Climatological Report (Monthly)
Issued by NWS Marquette, MI

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CXUS53 KMQT 182312 AAC
CLMMQT

CLIMATE REPORT...FINAL
NATIONAL WEATHER SERVICE MARQUETTE MI
715 PM EDT WED JUN 18 2014

...................................

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF MAY 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1961 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/28/1969
 LOW               17   05/09/1983
HIGHEST            87   05/31        62      25       86  05/30
LOWEST             25   05/06        39     -14       25  05/13
AVG. MAXIMUM     62.5              61.8     0.7     59.2
AVG. MINIMUM     40.2              39.9     0.3     38.0
MEAN             51.3              50.9     0.4     48.6
DAYS MAX >= 90      0               0.1    -0.1        0
DAYS MAX <= 32      0               0.1    -0.1        0
DAYS MIN <= 32      6               6.8    -0.8       11
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.91   1973
 MINIMUM         0.06   1986
TOTALS           2.53              3.05   -0.52     3.74
DAILY AVG.       0.08              0.10   -0.02     0.12
DAYS >= .01        12              11.5     0.5       12
DAYS >= .10         6               6.4    -0.4        9
DAYS >= .50         3               1.6     1.4        3
DAYS >= 1.00        0               0.6    -0.6        0
GREATEST
 24 HR. TOTAL    0.57   05/12 TO 05/12

SNOWFALL (INCHES)
RECORDS
 TOTAL           22.6   1990
TOTALS            3.6               1.5     2.1      4.5
SINCE 7/1       198.9             203.3    -4.4    214.7
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         1               0.3     0.7        3
GREATEST
 SNOW DEPTH         2   05/16                          3  05/01
 24 HR TOTAL      3.6   05/15 TO 05/16

DEGREE_DAYS
HEATING TOTAL     440               450     -10      512
 SINCE 7/1      10236              9152    1084     9143
COOLING TOTAL      20                11       9       13
 SINCE 1/1         20                12       8       13
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    33/270    DATE  05/09
                                                05/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER             MM
NUMBER OF DAYS FAIR          MM
NUMBER OF DAYS PC            MM
NUMBER OF DAYS CLOUDY        MM

AVERAGE RH (PERCENT)     MM

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       2
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                4     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      2
HAZE                      0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

...MAY 2014 MONTHLY CLIMATE SUMMARY FOR UPPER MICHIGAN...
(THIS DISCUSSION DOES NOT INCLUDE CHIPPEWA AND MACKINAC COUNTIES)

...NEAR TO BELOW AVERAGE MONTHLY MEAN TEMPERATURE...

...GENERALLY NEAR NORMAL PRECIPITATION EXCEPT WET OVER THE WEST...


MAY CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         51.3     50.9   PLUS    0.4
AVERAGE HIGH TEMPERATURE    62.5     61.8   PLUS    0.7
AVERAGE LOW TEMPERATURE     40.2     39.9   PLUS    0.3
HEATING DEGREE DAYS          440      450  MINUS     10
COOLING DEGREE DAYS           20       11   PLUS      9
TOTAL PRECIPITATION         2.53     3.05  MINUS   0.52
TOTAL SNOWFALL               3.6      1.5   PLUS    2.1

HIGHEST TEMPERATURE:                    87 ON 5/31
LOWEST TEMPERATURE:                     25 ON 5/6
GREATEST CALENDAR DAY PRECIPITATION:  0.57 ON 5/12
GREATEST 24 HOUR PRECIPITATION:       0.57 ON 5/12
GREATEST CALENDAR DAY SNOWFALL:        2.8 ON 5/15
GREATEST 24 HOUR SNOWFALL:             3.6 ON 5/15-5/16
GREATEST SNOW DEPTH:                     2 ON 5/16
PEAK WIND SPEED:      33 MPH FROM THE WEST ON 5/9 AND 5/10

DAILY RECORD SNOWFALL ON 5/15...2.8 /OLD RECORD 1.0...1997/
DAILY RECORD LOW MAXIMUM TEMPERATURE TIED ON 5/15...38 /38...2005/
DAILY RECORD LOW MAXIMUM TEMPERATURE ON 5/16...41 /42...1997/
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                            LAKE SUPERIOR  LAKE MICHIGAN-HURON
05/01/14 DAILY MEAN         601.54/183.35     578.00/176.18
05/31/14 DAILY MEAN         602.13/183.53     578.51/176.33
AVG APR 2014 DAILY MEAN     601.28/183.27     577.62/176.06
AVG MAY 2013 DAILY MEAN     600.77/183.11     577.21/175.93
LONG TERM MAY DAILY MEAN    601.54/183.35     578.97/176.47
MAXIMUM MAY DAILY MEAN      602.82/183.74     581.63/177.28
                                (1986)           (1986)
MINIMUM MAY DAILY MEAN      599.61/182.76     576.57/175.74
                                (1926)           (1964)

...GREAT LAKES WATER LEVELS CONTINUE STEADY RISE IN MAY...

THE COMBINATION OF RUNOFF FROM RECENT SNOWMELT AND HEAVY
PRECIPITATION AS WELL AS REDUCED EVAPORATION DUE TO CHILLY WATER
TEMPERATURES AND LINGERING ICE COVER MAINLY ON LAKE SUPERIOR CAUSED
GREAT LAKES WATER LEVELS TO RISE STEADILY IN MAY. BY THE END OF THE
MONTH...THE LAKE SUPERIOR WATER LEVEL WAS OVER 16 INCHES HIGHER THAN
IN MAY 2013 ABOUT 7 INCHES ABOVE THE LONG TERM NORMAL. THE LEVEL OF
LAKES MICHIGAN/HURON ON 5/31 WAS ALMOST 16 INCHES HIGHER THAN DURING
LAST MAY BUT STILL 5 TO 6 INCHES BELOW AVERAGE.

OBTAIN GREAT LAKES WATER LEVEL DATA AS REPORTED BY THE U.S. ARMY
CORPS OF ENGINEERS AT

HTTP://WWW.LRE.USACE.ARMY.MIL/MISSIONS/GREATLAKESINFORMATION/
       GREATLAKESWATERLEVELS/CURRENTCONDITIONS.ASPX (ALL LOWER CASE).
---------------------------------------------------------------------
                        MAY CLIMATE HIGHLIGHTS

HIGHEST REPORTED TEMPERATURE...90 AT KENTON IN SOUTHERN HOUGHTON
                                COUNTY ON 5/31

LOWEST REPORTED TEMPERATURE...22 AT A SITE 5 MILES INLAND FROM
                               MUNISING ON 5/6 AND 5/17...AND A SITE
                               10 MILES NORTHWEST OF NEWBERRY ON 5/6

HIGHEST AVERAGE TEMPERATURE...53.9 DEGREES AT IRON MOUNTAIN

LOWEST AVERAGE TEMPERATURE...46.5 DEGREES AT MARQUETTE CITY

HIGHEST MONTHLY PRECIPITATION...4.23 INCHES 6 MILES INLAND FROM
                                 ONTONAGON

LOWEST MONTHLY PRECIPITATION...2.13 INCHES AT CLARKSBURG/CHAMPION IN
                                MARQUETTE COUNTY

HIGHEST MONTHLY SNOWFALL...3.6 INCHES AT NEGAUNEE IN MARQUETTE
                            COUNTY


THE WEATHER PATTERN IN MAY FEATURED A MAJOR CHANGE SOON AFTER THE
MIDDLE OF THE MONTH FROM THE DEEP UPPER TROUGH OVER EASTERN NORTH
AMERICA AND THE GREAT LAKES THAT HAD DOMINATED SINCE THANKSGIVING TO
A HIGH AMPLITUDE RIDGE. THE RESULT FOR UPPER MICHIGAN WEATHER WAS A
SHIFT FROM A COOL...WET REGIME THROUGH ABOUT 5/17 TO A WARM AND DRY
ONE THE LAST TWO WEEKS OF MAY. MEAN DAILY TEMPERATURES AVERAGED 5 TO
10 DEGREES BELOW NORMAL THE FIRST 17 DAYS OF MAY AND THEN 5 TO 10
DEGREES ABOVE NORMAL AFTER 5/18. THE RESULT WAS A NEAR TO SOMEWHAT
BELOW NORMAL MONTHLY MEAN TEMPERATURE BETWEEN 46 AND 54 DEGREES AT
MOST LOCATIONS. THESE READINGS RANGED FROM ABOUT 0.5 DEGREE ABOVE
AVERAGE TO 2 DEGREES BELOW NORMAL...COOLEST OVER THE EAST HALF OF
THE U.P. LOCATIONS NEAR THE INFLUENCE OF THE CHILLY GREAT LAKES WERE
COOLEST...ESPECIALLY ALONG THE EAST HALF OF LAKE SUPERIOR WHERE ICE
THAT HAD FORMED IN THE INTENSE WINTER COLD PERSISTED THROUGH THE
MONTH. AT LEAST SOME ICE LINGERED THROUGH THE END OF MAY IN THE LAKE
SUPERIOR WATERS NEAR MARQUETTE...DRIVING THE MONTHLY AVERAGE
TEMPERATURE AT THAT LOCATION TO 4.5 DEGREES BELOW NORMAL. THE MAY
MEAN TEMPERATURES WERE 14 TO 18 DEGREES HIGHER THAN THE AVERAGE
APRIL READINGS.

THE COOLEST WEATHER RELATIVE TO NORMAL OCCURRED DURING THE MIDDLE OF
THE FIRST WEEK OF MAY AND AT THE START OF THE THIRD WEEK. THE
THERMOMETER READ NEAR 10 DEGREES BELOW NORMAL ON 5/4 THROUGH 5/6
AND THEN AROUND 15 DEGREES BELOW AVERAGE ON 5/15 AN 5/16. PLENTIFUL
CLOUD COVER...A CHILLY NORTH WIND AND EVEN SOME SNOW OVER PORTIONS
OF UPPER MICHIGAN TO THE WEST OF A LOW PRESSURE SYSTEM MOVING
THROUGH LOWER MICHIGAN RESULTED IN SOME DAILY RECORD LOW MAXIMUM
TEMPERATURES IN THE 30S ON 5/15 AND 5/16. THE MERCURY TOPPED OUT IN
THE SUMMER-LIKE 80S ON SEVERAL OF THE DAYS DURING THE LAST WEEK OF
MAY...LIFTING MEAN DAILY TEMPERATURES ON 5/25...5/26...5/30 AND 5/31
TO AROUND 15 DEGREES ABOVE NORMAL. THERE WAS EVEN A 90-DEGREE
MAXIMUM TEMPERATURE AT KENTON IN FAR SOUTHERN HOUGHTON COUNTY ON
5/31.

MOST OF THE PRECIPITATION THAT OCCURRED IN MAY FELL DURING THE FIRST
HALF OF THE MONTH WHEN SEVERAL IMPORTANT DISTURBANCES PASSED THROUGH
THE DOMINATING UPPER TROUGH. EXCEPT FOR SOME RAIN ON 5/19 INTO
5/20...THERE WAS LITTLE PRECIPITATION ACROSS UPPER MICHIGAN AFTER
5/16. TOTAL MAY PRECIPITATION RANGED FROM 2 TO 3 INCHES OVER MOST OF
THE CENTRAL AND EAST TO 4 INCHES OR MORE OVER THE WEST...AMOUNTS
RANGING FROM ABOUT 75 PERCENT OF NORMAL AT THE DRIER LOCATIONS TO
ALMOST 150 PERCENT OF AVERAGE NEAR ONTONAGON...WHICH LED REPORTING
STATIONS WITH 4.23 INCHES. THE MOST SIGNIFICANT RAIN EVENT OF THE
MONTH OCCURRED OVER THE WEST FROM LATE ON 5/7 INTO THE EARLY MORNING
HOURS ON 5/9...WHEN A LOW PRESSURE SYSTEM MOVED NORTHEAST FROM THE
CENTRAL PLAINS THROUGH WESTERN LAKE SUPERIOR. MANY LOCATIONS OVER
THE WEST FROM THE KEWEENAW THROUGH IRONWOOD REPORTED 1 TO 2 INCHES
OF RAIN AND AS MUCH AS 2.14 INCHES AT THE SITE NEAR ONTONAGON.
DURING THE 5/19 INTO 5/20 EVENT...AN INCH OR MORE OF RAIN FELL OVER
THE SOUTH CENTRAL TO THE NORTH OF AN APPROACHING WARM FRONT. A
LOCATION NEAR IRON RIVER LOGGED 1.41 INCHES OF RAIN.

ALTHOUGH SOME LIGHT SNOW WAS MIXED WITH THE RAIN SHOWERS WHICH
ACCOMPANIED THE PASSAGE OF A PAIR OF DISTURBANCES ON 5/4 INTO 5/5 IN
THE NORTHWEST FLOW ALOFT...ANY SNOW ACCUMULATION WAS NEGLIGIBLE.
MORE SIGNIFICANT SNOW OCCURRED LATE ON 5/15 OVER MAINLY THE HIGHER
TERRAIN OF THE NORTH CENTRAL ON THE WESTERN FLANK OF THE LOW MOVING
NORTH OVER LOWER MICHIGAN. SOME LOCATIONS PICKED UP 1 TO 3 INCHES OF
WET SNOW...WITH AS MUCH AS 3.6 INCHES FALLING AT NEGAUNEE IN
MARQUETTE COUNTY FROM LATE IN THE DAY ON 5/15 INTO EARLY 5/16.
---------------------------------------------------------------------
     ...TOP 5 COLDEST SPRING AT MOST PLACES IN UPPER MICHIGAN...

                ...MARCH-MAY 2014 MEAN TEMPERATURE...

                                          /OR PREVIOUS/
              OBSERVED  NORMAL  DEPARTURE     RECORD       2014 RANK

MUNISING        32.0     38.9      -6.9    32.0 /1920/     NEW RECORD

MANISTIQUE      32.1     38.4      -6.3    33.0 /1996/     NEW RECORD

NEWBERRY        33.6     37.9      -4.3    33.9 /1926/     NEW RECORD

IRONWOOD        33.3     38.8      -5.5    31.8 /1996/    2ND COLDEST

MARQUETTE NWS   33.4     37.7      -4.3    32.5 /1996/    3RD COLDEST

IRON MOUNTAIN   36.1     41.0      -4.9    35.4 /1950/    4TH COLDEST

MARQUETTE CITY  33.0     40.0      -7.0    30.4 /1888/    5TH COLDEST

HOUGHTON        32.8     37.8      -5.0    29.4 /1888/    7TH COLDEST
---------------------------------------------------------------------
...TOP 10 HIGHEST SPRING SNOWFALL AT SOME PLACES IN UPPER MICHIGAN...

                    ...MARCH-MAY 2014 SNOWFALL...

              OBSERVED  NORMAL  DEPARTURE     RECORD       2014 RANK

MUNISING        46.8     26.7     +20.1    69.5 /2007/    7TH HIGHEST

IRONWOOD        61.1     38.2     +22.9    91.0 /2013/    8TH HIGHEST

MARQUETTE NWS   69.4     50.9     +18.5   102.3 /2002/    8TH HIGHEST

MANISTIQUE      22.0     13.4      +8.6    47.5 /1939/   11TH HIGHEST

NEWBERRY        30.1     25.1      +5.0    88.5 /2002/   14TH HIGHEST

HOUGHTON        48.9     28.0     +20.9    74.8 /2013/   15TH HIGHEST

MARQUETTE CITY  43.0     29.8     +13.2    58.8 /1893/   19TH HIGHEST

IRON MOUNTAIN   23.6     15.9      +7.7    44.5 /1972/   21ST HIGHEST
---------------------------------------------------------------------
                  ...MARCH-MAY 2014 PRECIPITATION...

              OBSERVED  NORMAL  DEPARTURE     RECORD       2014 RANK

MUNISING       10.17     7.27     +2.90   12.61 /1960/    9TH HIGHEST

NEWBERRY        8.25     7.10     +1.15   17.12 /2002/   21ST HIGHEST

IRONWOOD        9.84     7.75     +2.09   15.67 /2013/   23RD HIGHEST

HOUGHTON        7.28     5.90     +1.38   13.02 /1954/       ****

MANISTIQUE      7.17     6.23     +0.94   14.30 /1960/       ****

MARQUETTE CITY  7.71     6.98     +0.73   15.01 /1960/       ****

IRON MOUNTAIN   7.31     7.05     +0.26   12.56 /2002/       ****

MARQUETTE NWS   8.94     9.09     -0.15   15.43 /1973/       ****

*** NOT IN TOP 25
---------------------------------------------------------------------
SOME OTHER TEMPERATURE AND PRECIPITATION OBSERVATIONS ACROSS UPPER
MICHIGAN IN MAY 2014 INCLUDE:

IRONWOOD...AVERAGE TEMPERATURE 52.2 (0.3 DEGREE ABOVE NORMAL)
           PRECIPITATION 3.85 INCHES (0.72 INCH ABOVE NORMAL)
           SNOWFALL 0.0 INCH (1.9 INCHES BELOW NORMAL)

WATERSMEET (GOGEBIC COUNTY)...PRECIPITATION 4.62 INCHES

ONTONAGON...AVERAGE TEMPERATURE 53.3 (0.2 DEGREE BELOW NORMAL)
 (6 MILES   PRECIPITATION 4.23 INCHES (1.26 INCHES ABOVE NORMAL)
  INLAND)   SNOWFALL 0.0 INCH (1.0 INCH BELOW NORMAL)

GREENLAND (ONTONAGON COUNTY)...PRECIPITATION 4.62 INCHES

BERGLAND DAM (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 51.1 DEGREES
                                  PRECIPITATION 4.16 INCHES

HOUGHTON COUNTY...AVERAGE TEMPERATURE 50.2 (NORMAL)
 AIRPORT          PRECIPITATION 2.56 INCHES (0.06 INCH ABOVE NORMAL)
                  SNOWFALL 0.5 INCH (0.5 INCH BELOW NORMAL)

ATLANTIC MINE (HOUGHTON COUNTY)...PRECIPITATION 4.12 INCHES
                                  SNOWFALL 0.5 INCH

COPPER HARBOR...AVERAGE TEMPERATURE 48.1 DEGREES
                PRECIPITATION 2.83 INCHES

JACOBSVILLE (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 47.3 DEGREES
                                PRECIPITATION 3.38 INCHES
                                SNOWFALL TRACE

BARAGA...AVERAGE TEMPERATURE 50.1 DEGREES
         PRECIPITATION 2.23 INCHES
         SNOWFALL TRACE

WATTON (BARAGA COUNTY)...AVERAGE TEMPERATURE 50.8 DEGREES
                         PRECIPITATION 2.67 INCHES
                         SNOWFALL 0.4 INCH

HERMAN (BARAGA COUNTY)...AVERAGE TEMPERATURE 48.4 DEGREES
                         PRECIPITATION 2.59 INCHES
                         SNOWFALL 2.2 INCHES

CLARKSBURG (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 49.0 DEGREES
                                PRECIPITATION 2.13 INCHES
                                SNOWFALL 0.5 INCH

BIG BAY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 49.7 DEGREES
                             PRECIPITATION 2.66 INCHES
                             SNOWFALL 2.8 INCHES

MARQUETTE CITY...AVERAGE TEMPERATURE 46.5 (4.5 DEGREES BELOW NORMAL)
                 PRECIPITATION 2.60 INCHES (0.15 INCH ABOVE NORMAL)
                 SNOWFALL TRACE (0.6 INCH BELOW NORMAL)

HARVEY (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 51.7 DEGREES
                            PRECIPITATION 2.51 INCHES
                            SNOWFALL TRACE

GWINN (MARQUETTE COUNTY)...PRECIPITATION 2.70 INCHES
                           SNOWFALL 0.3 INCH

CHATHAM (ALGER COUNTY)...AVERAGE TEMPERATURE 50.4 DEGREES
                         PRECIPITATION 3.36 INCHES
                         SNOWFALL 1.0 INCH

MUNISING...AVERAGE TEMPERATURE 47.7 (2.3 DEGREES BELOW NORMAL)
           PRECIPITATION 3.86 INCHES (0.88 INCH ABOVE NORMAL)
           SNOWFALL 3.0 INCHES (2.7 INCHES ABOVE NORMAL)

NEWBERRY...AVERAGE TEMPERATURE 49.7 (1.9 DEGREES BELOW NORMAL)
           PRECIPITATION 2.98 INCHES (0.37 INCH ABOVE NORMAL)
           SNOWFALL TRACE (0.1 INCH BELOW NORMAL)

STAMBAUGH (IRON COUNTY)...AVERAGE TEMPERATURE 50.9 DEGREES
                          PRECIPITATION 2.22 INCHES
                          SNOWFALL 0.5 INCH

AMASA (IRON COUNTY)...PRECIPITATION 2.53 INCHES
                      SNOWFALL 0.2 INCH

IRON MOUNTAIN...AVERAGE TEMPERATURE 53.9 (0.2 DEGREE ABOVE NORMAL)
                PRECIPITATION 2.85 INCHES (0.19 INCH BELOW NORMAL)
                SNOWFALL 0.0 INCH (0.7 INCH BELOW NORMAL)

NORWAY (DICKINSON COUNTY)...AVERAGE TEMPERATURE 53.5 DEGREES
                            PRECIPITATION 2.46 INCHES
                            SNOWFALL TRACE

DAGGETT (MENOMINEE COUNTY)...PRECIPITATION 3.57 INCHES

ESCANABA...AVERAGE TEMPERATURE 53.3 DEGREES
           PRECIPITATION 2.73 INCHES

GLADSTONE (DELTA COUNTY)...PRECIPITATION 3.17 INCHES
                           SNOWFALL TRACE

GARDEN CORNERS (DELTA COUNTY)...AVERAGE TEMPERATURE 50.9 DEGREES
                                PRECIPITATION 2.45 INCHES
                                SNOWFALL TRACE

COOKS (SCHOOLCRAFT COUNTY)...PRECIPITATION 2.59 INCHES
                             SNOWFALL TRACE

MANISTIQUE...AVERAGE TEMPERATURE 46.9 (2.4 DEGREES BELOW NORMAL)
             PRECIPITATION 2.38 INCHES (0.35 INCH BELOW NORMAL)
             SNOWFALL 0.0 INCH (NORMAL)

                        MAY WEATHER SUMMARY

A DEEP UPPER TROUGH WAS IN PLACE OVER THE GREAT LAKES MOST OF THE
FIRST WEEK OF MAY...CAUSING MEAN DAILY TEMPERATURES ON 5/1 THROUGH
5/6 TO RUN 5 TO 10 DEGREES BELOW AVERAGE. A SERIES OF DISTURBANCES
MOVING THROUGH THIS TROUGH BROUGHT SOME STEADY RAINS TO AT LEAST
PORTIONS OF THE U.P. ON 5/1 AND THEN AGAIN ON 5/2 INTO 5/3. DURING
THE 5/1 EVENT...A LOW PRESSURE SYSTEM TRACKING NORTHEAST THROUGH THE
CENTRAL GREAT LAKES DROPPED AS MUCH AS 0.50 INCH OF RAIN ON PORTIONS
OF CENTRAL AND EASTERN UPPER MICHIGAN AND AS MUCH AS 0.64 INCH AT
MUNISING. ONLY SCATTERED SHOWERS FELL ACROSS THE WEST. AREAS OF
DENSE FOG ALSO PLAGUED PORTIONS OF THE U.P. ON 5/1...MAINLY IN THE
MORNING WHERE THE MELTING WINTER SNOWPACK LINGERED. OVER THE HIGHER
TERRAIN OF THE HURON MOUNTAINS IN BARAGA COUNTY...HERMAN STILL HAD
18 INCHES OF SLOPPY SNOW ON THE GROUND ON 5/1. ANOTHER LOW PRESSURE
SYSTEM SLID ACROSS LAKE SUPERIOR ON 5/3...BRINGING 0.10 TO 0.25 INCH
OF RAIN TO MOST LOCATIONS AND UP TO 0.41 INCH AT GARDEN CORNERS IN
DELTA COUNTY. A TRAILING WEAKER DISTURBANCE CROSSED THE UPPER GREAT
LAKES ON 5/4 INTO 5/5 AND WAS ACCOMPANIED BY SOME LIGHT RAIN SHOWERS
THAT WERE MIXED WITH SNOW OVER THE HIGHER TERRAIN. UP TO 0.4 INCH OF
WET SNOW ACCUMULATED ON 5/4 INTO 5/5 AT HERMAN...WHERE 9 INCHES
STILL REMAINED ON THE GROUND ON 5/5.

A BUILDING UPPER RIDGE OVER THE GREAT LAKES AND EASTERN NORTH
AMERICA BROUGHT A WELCOME WARMING TREND ON 5/7 THROUGH 5/11. NEAR
NORMAL DAILY AVERAGE TEMPERATURES ON 5/7 ROSE TO 5 OR MORE DEGREES
ABOVE THE MEAN ON 5/8 THROUGH 5/11. THE WARMEST DAY WAS ON 5/9...
WHEN THE THERMOMETER RAN 10 TO 15 DEGREES ABOVE NORMAL AND READINGS
PEAKED IN THE 70S IN THE AFTERNOON FOR THE FIRST TIME SINCE OCTOBER
2013 AT MANY LOCATIONS AWAY FROM THE COOLING INFLUENCE OF THE CHILLY
GREAT LAKES WATERS.

DESPITE THE BUILDING RIDGE...SOME MODERATE TO HEAVY RAIN SHOWERS AND
THUNDERSTORMS FELL ON 5/7 THROUGH 5/8 TO THE NORTH OF A WARM FRONT
ASSOCIATED WITH A STRONG UPPER DISTURBANCE LIFTING NORTH THROUGH THE
UPPER MISSISSIPPI RIVER VALLEY ON THE WESTERN FLANK OF THE UPPER
RIDGE. AT LEAST 0.25 TO 0.75 INCH OF RAIN FELL DURING THIS EVENT
WITH AN INCH OR MORE OF PRECIPITATION RECORDED AT A NUMBER OF
LOCATIONS...ESPECIALLY OVER THE WEST. A LOCATION NEAR ONTONAGON...
WATERSMEET IN GOGEBIC COUNTY AND IRONWOOD LED REPORTING STATIONS
WITH 2.14 INCHES...2.10 INCHES AND 2.01 INCHES OF RAIN RESPECTIVELY
BEFORE THE PASSAGE OF A COLD FRONT ASSOCIATED WITH THE UPPER
DISTURBANCE AND SURFACE LOW PRESSURE MOVING INTO NORTHWEST ONTARIO
ENDED ANY LINGERING SHOWERS ON 5/9. AREAS OF DENSE FOG IN THE
MORNING ON 5/9 GAVE WAY TO MORE SUNSHINE THAT BOOSTED AFTERNOON
TEMPERATURES INTO THE 70S BEFORE WEST WINDS GUSTING UP TO 30 TO 40
MPH DROVE SOMEWHAT COOLER...BUT STILL WARMER THAN NORMAL AIR INTO
THE AREA. THE FOG AND LOW CLOUDS LINGERED LONGEST OVER THE EAST
DOWNWIND OF LAKE MICHIGAN AND LIMITED THE WARMUP IN THAT AREA ON
5/9. THE GUSTY WEST WINDS...STRONGEST OVER THE KEWEENAW PENINSULA...
SUBSIDED ON 5/10 WITH THE CLOSER APPROACH OF A SURFACE HIGH PRESSURE
SYSTEM.

THE UPPER RIDGE SHIFTED TO THE EAST ON 5/12...ALLOWING ANOTHER
TROUGH TO DEVELOP OVER THE CENTRAL GREAT LAKES. THIS FEATURE
AMPLIFIED INTO THE GREAT LAKES THROUGH MID-MONTH...WHICH OPENED THE
DOOR FOR SOME COOLER CANADIAN AIR TO RUSH INTO UPPER MICHIGAN. MEAN
DAILY TEMPERATURES DROPPED FROM NEAR NORMAL ON 5/12 AND 5/13 TO AS
MUCH AS 10 TO 15 DEGREES BELOW AVERAGE ON 5/15 AND 5/16.

A LOW PRESSURE SYSTEM ON THE COLD FRONT THAT MARKED THE LEADING EDGE
OF THE COOLER AIR MARCHED NORTH THROUGH THE UPPER MISSISSIPPI RIVER
VALLEY AND OVER FAR WESTERN LAKE SUPERIOR ON 5/12 BEFORE MOVING INTO
NORTHWEST ONTARIO ON 5/13. SHOWERS ASSOCIATED WITH THIS LOW WERE
HEAVIEST OVER THE WEST...WHERE JACOBSVILLE IN HOUGHTON COUNTY
MEASURED AS MUCH AS 1.33 INCHES OF RAIN. BUT EVEN OVER THE EAST
FARTHER FROM THE PATH OF THE LOW...AT LEAST 0.25 TO 0.50 INCH OF
PRECIPITATION FELL BEFORE THE PRECIPITATION DIMINISHED TO NOTHING
MORE THAN DRIZZLE AND LIGHT SHOWERS BY LATER ON 5/12.

AREAS OF DENSE FOG DEVELOPED DURING THE NIGHT ON 5/12-5/13 IN THE
LINGERING LOW LEVEL MOISTURE AHEAD OF THE INCOMING COLD FRONT
ATTENDANT TO THE ONTARIO LOW. THIS FRONT PASSED ON 5/13 AND WAS
FOLLOWED BY WEST WINDS GUSTING AS HIGH AS 40 TO 45 MPH THAT ADVECTED
MUCH COOLER AIR INTO THE AREA. AFTER A MOSTLY SUNNY AND COOLER DAY
ON 5/14 WITH MEAN DAILY TEMPERATURES RUNNING 5 TO 10 DEGREES BELOW
NORMAL...A REINFORCING COLD FRONT TRACKED OVER UPPER MICHIGAN DURING
THE NIGHT ON 5/14-5/15 WITHOUT CAUSING ANY PRECIPITATION. AS THE
FRONT STALLED JUST TO THE SOUTHEAST...A WAVE OF LOW PRESSURE BEGAN
TO MOVE NORTH ALONG THIS BOUNDARY SEPARATING THE CHILLY AIR OVER THE
UPPER LAKES FROM WARMER CONDITIONS TO THE EAST. RAIN ASSOCIATED WITH
THIS LOW DEVELOPED OVER THE UPPER PENINSULA ON 5/15. BUT AS NORTH
WINDS GUSTING UP TO 30 MPH DREW COLDER AIR INTO THE AREA...THIS
PRECIPITATION CHANGED TO MAINLY SNOW. BY THE TIME THE LOW MOVED
FARTHER NORTH AND THE PRECIPITATION DIMINISHED IN THE EARLY MORNING
ON 5/16...SOME LOCATIONS OVER THE HIGHER TERRAIN OF THE NORTH
CENTRAL HAD PICKED UP 1 TO 3 INCHES OF WET SNOW. AS MUCH AS 3.6
INCHES OF THE WHITE STUFF ACCUMULATED NEAR NEGAUNEE IN MARQUETTE
COUNTY. WATER EQUIVALENT PRECIPITATION AVERAGED AROUND 0.25 INCH
OVER THE CENTRAL AND EAST BUT WAS AS MUCH AS 0.58 INCH AT MUNISING.
LITTLE IF ANY RAIN AND SNOW FELL OVER THE FAR WEST FARTHER FROM THE
SURFACE LOW TRACK. EVEN THOUGH ONLY LIGHT RAIN AND SNOW SHOWERS
LINGERED ON 5/16...PLENTY OF CLOUDS REMAINED. NEW RECORD LOW MAXIMUM
TEMPERATURES IN THE CHILLY 30S WERE ESTABLISHED AT MANY LOCATIONS ON
BOTH 5/15 AND 5/16.

THE DEEP UPPER TROUGH SLOWLY WEAKENED AND SHIFTED TO THE NORTHEAST
ON 5/17...ALLOWING FOR A GRADUAL DRYING AND WARMING TREND. BUT
DAYTIME HEATING AND LINGERING CHILLY AIR ALOFT RESULTED IN SOME
GENERALLY LIGHT INSTABILITY RAIN SHOWERS DURING MAINLY THE
AFTERNOONS AND EARLY EVENINGS ON 5/17 AND 5/18. MEAN DAILY
TEMPERATURES BETWEEN 5 AND 10 DEGREES BELOW NORMAL ON 5/17 ROSE TO
NEAR NORMAL ON 5/18.

THE UPPER AIR PATTERN BEGAN A TRANSITION TOWARD AN UPPER RIDGE IN
CENTRAL NORTH AMERICA AT THE END OF THE THIRD WEEK OF MAY. MEAN
DAILY TEMPERATURES ON 5/19 THROUGH 5/21 AVERAGED AROUND 5 DEGREES
ABOVE NORMAL. AN AREA OF RAIN NORTH OF AN APPROACHING WARM FRONT
THAT WAS THE EDGE OF THE RETREATING COOLER AIR ARRIVED NEAR THE
WISCONSIN BORDER LATE ON 5/19 AND LIFTED NORTHEAST ACROSS THE U.P.
BEFORE ENDING IN THE MORNING ON 5/20. MOST LOCATIONS PICKED UP AT
LEAST 0.25 TO 0.75 INCH OF RAIN. AN INCH OR MORE FELL OVER PORTIONS
OF THE SOUTH CENTRAL...INCLUDING 1.41 INCHES AT A SPOT NEAR IRON
RIVER. AREAS OF DENSE FOG FORMED DURING THE NIGHT ON 5/20-5/21 WITH
NOCTURNAL COOLING OVER THE RAIN-MOISTENED SURFACE. THERE WERE MORE
LIGHT SHOWERS ON 5/21 ACCOMPANYING THE PASSAGE OF AN UPPER
DISTURBANCE AND COOL FRONT...BUT MOST PLACES SAW LESS THAN 0.10 INCH
OF RAIN. DRIER AND A BIT COOLER AIR RETURNED FOR 5/22...WHEN MEAN
DAILY TEMPERATURES WERE A FEW DEGREES BELOW NORMAL UNDER A GOOD DEAL
OF LOW CLOUDS.

THE BUILDING UPPER RIDGE OVER CENTRAL NORTH AMERICA THAN BECAME THE
DOMINATING INFLUENCE ON U.P. WEATHER FROM 5/23 THROUGH THE END OF
THE MONTH...BRINGING A PERIOD OF DRY AND GENERALLY VERY WARM
WEATHER. ON 5/23 AND 5/24...NEARLY STATIONARY HIGH PRESSURE OVER THE
UPPER LAKES DELIVERED MOSTLY CLEAR SKIES AND MEAN DAILY TEMPERATURES
AROUND 5 DEGREES ABOVE AVERAGE. ONCE THE HIGH SHIFTED TO THE EAST
TOWARD THE MID ATLANTIC STATES ON 5/25...A WARMER SOUTHWEST FLOW
DOMINATED AND LIFTED MEAN DAILY TEMPERATURES ON 5/25 AND 5/26 TO 10
TO 20 DEGREES ABOVE NORMAL. THE MERCURY REACHED WELL INTO THE 80S AT
MANY LOCATIONS AWAY FROM THE COOLING INFLUENCE OF MAINLY LAKE
MICHIGAN DURING THE AFTERNOONS ON BOTH 5/25 AND 5/26. THE
COMBINATION OF THIS DAYTIME HEATING AND THE ARRIVAL OF MORE MOISTURE
ON 5/26 CAUSED SOME SHOWERS AND THUNDERSTORMS TO DEVELOP OVER MAINLY
THE SOUTH CENTRAL IN THE AFTERNOON. THE STRONGEST STORMS CAUSED
WINDS TO GUST AS HIGH AS 45 MPH AT IRON MOUNTAIN AND DROPPED PEA-
SIZED HAIL AT A FEW LOCATIONS IN MENOMINEE COUNTY.

THE PASSAGE OF A COOL FRONT DURING THE NIGHT ON 5/26-5/27 ENDED THE
SHOWERS AND BROUGHT A RETURN OF A MORE SEASONABLE AIRMASS ON THE
SOUTHERN FLANK OF HIGH PRESSURE IN ONTARIO ON 5/27 AND 5/28...WHEN
MEAN DAILY TEMPERATURES AVERAGED NEAR NORMAL. ONCE THE HIGH SHIFTED
TO THE SOUTHEAST ON 5/29 AND A SOUTHWEST FLOW DEVELOPED UNDER CLEAR
TO PARTLY CLOUDY SKIES...WARMER WEATHER RETURNED THROUGH THE END OF
MAY. MEAN DAILY TEMPERATURES RAN 5 TO 10 DEGREES ABOVE NORMAL ON
5/29...AROUND 10 DEGREES ABOVE AVERAGE ON 5/30 AND THEN 10 TO 20
DEGREES WARMER THAN NORMAL ON 5/31. THE THERMOMETER ROSE INTO THE
80S AWAY FROM THE COOLING INFLUENCE OF THE LAKES...PRIMARILY LAKE
MICHIGAN...ON ALL 3 DAYS...AND READINGS PEAKED AS HIGH AS A SUMMER-
LIKE 90 AT KENTON IN SOUTHERN HOUGHTON COUNTY DURING THE AFTERNOON
ON 5/31.

                           JUNE FORECAST

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING A GREATER THAN
CLIMATOLOGICAL CHANCE OF A BELOW NORMAL MONTHLY MEAN TEMPERATURE
OVER ALL OF UPPER MICHIGAN IN JUNE 2014. THE CPC FORECAST SHOWS A
GREATER THAN CLIMATOLOGICAL CHANCE OF ABOVE NORMAL MONTHLY
PRECIPITATION OVER THE WEST HALF OF UPPER MICHIGAN BUT EQUAL CHANCES
OF ABOVE AND BELOW NORMAL MONTHLY PRECIPITATION OVER THE EAST HALF
IN JUNE 2014.

                          JUNE CLIMATOLOGY

AVERAGE TEMPERATURES CONTINUE TO RISE DURING JUNE AS DAILY POSSIBLE
SUNSHINE PEAKS AT 950 MINUTES AROUND THE SUMMER SOLSTICE...WHICH
OCCURS THIS YEAR AT 6:51 AM EDT ON 6/21. AT THE MARQUETTE NWS...THE
AVERAGE TEMPERATURE OF 56 ON 6/1 INCREASES TO 64 BY 6/30. THE JUNE
AVERAGE TEMPERATURE AT MOST PLACES OVER UPPER MICHIGAN IS ABOUT NINE
DEGREES HIGHER THAN IN MAY. AN INCREASE IN CONVECTIVE ACTIVITY FROM
MAY TO JUNE ALSO PUSHES AVERAGE MONTHLY PRECIPITATION UP AT MOST
LOCATIONS. SLOW MOVING THUNDERSTORMS CAN DROP TORRENTIAL RAIN...AND
12.26 INCHES OF RAIN DELUGED THE MARQUETTE NWS IN JUNE 1968. THE
HIGHEST RECORD DAILY RAINFALL AMOUNT AT ALL STATIONS IN JUNE EXCEEDS
TWO INCHES.

EVEN THOUGH AVERAGE TEMPERATURES THROUGH THE MONTH SHOW A STEADY
WARMING TREND...FROST REMAINS A THREAT EVEN LATE IN JUNE. THE LATEST
OCCURRENCE OF FREEZING TEMPERATURES AT THE MARQUETTE NWS IS 6/22...
AND AS LATE AS 6/26 AT NEWBERRY. SHELTERED COLD SPOTS IN THE
INTERIOR CAN HAVE FROST THROUGH 6/30. ALTHOUGH ACCUMULATING SNOW IS
RARE...IT CAN OCCUR EARLY IN THE MONTH. ON 6/2/98...HIGHER TERRAIN
AREAS IN NORTH CENTRAL UPPER MICHIGAN RECORDED A SLUSHY INCH OF
SNOW.

THE COOLEST JUNE IN RECENT MEMORY WAS IN 2004...WHEN TEMPERATURES
AVERAGED 2 TO 4 DEGREES BELOW NORMAL. BUT JUNE 1982 SAW EVEN LOWER
TEMPERATURES...ABOUT SIX OR SEVEN DEGREES BELOW NORMAL. IN FACT...
JUNE 1982 IS THE COOLEST SIXTH MONTH ON RECORD AT MUNISING (MONTHLY
AVERAGE TEMPERATURE 52.9)...IRONWOOD (54.4)...MARQUETTE CITY
(54.4)...AND ONTONAGON (56.2). JUNE 1982 LANDED IN THE LIST OF TOP
TEN COOLEST AT MOST LOCATIONS.

ALTHOUGH EARLY SPRING CHILL CAN OCCUR IN JUNE...BLISTERING SUMMER
HOT SPELLS ARE ALSO POSSIBLE. RECORD HIGH TEMPERATURES AT ALL
REPORTING STATIONS ARE BETWEEN 94 AND 100. AT ALMOST EVERY
LOCATION...JUNE 2005 IS AMONG THE TOP TEN WARMEST ON RECORD. A
SWELTERING HEAT WAVE WITH DAYTIME HIGHS IN THE 90S AWAY FROM THE
COOLING INFLUENCE OF THE GREAT LAKES DURING PART OF THE FOURTH WEEK
OF THAT MONTH PUSHED AVERAGE MONTHLY TEMPERATURES 3 TO 6 DEGREES
ABOVE NORMAL. AT ONTONAGON (67.9) AND MANISTIQUE (64.0)...JUNE 2005
IS THE WARMEST ON RECORD. JUNE 1995 WAS ALSO VERY WARM...WITH MEAN
TEMPERATURES AVERAGING AS MUCH AS 6 TO 7 DEGREES ABOVE NORMAL. IN
FACT...THAT JUNE IS THE WARMEST ON RECORD AT THE MARQUETTE NWS
(66.3)...THE HOUGHTON COUNTY AIRPORT (66.1)...AND MUNISING (65.1).
ONLY AT IRONWOOD DID JUNE 1995 NOT END UP IN THE TOP TEN WARMEST. A
TORRID HEATWAVE AROUND MID MONTH PUSHED THE MERCURY UP TO THE
CENTURY MARK AT IRON MOUNTAIN ON 6/19/95. THE 78.6-DEGREE AVERAGE
TEMPERATURE AT IRON MOUNTAIN BETWEEN 6/18 AND 6/25 IN 1995 PUTS THAT
EIGHT-DAY STRETCH IN THE RECORD BOOK AS THE WARMEST WEEK IN JUNE
EVER OBSERVED THERE. THE HIGH TEMPERATURE EXCEEDED 90 ON SEVEN OF
THOSE EIGHT DAYS.

                 OUTLOOK FOR SUMMER INTO EARLY FALL

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING A GREATER THAN
CLIMATOLOGICAL CHANCE OF A BELOW NORMAL 3-MONTH MEAN TEMPERATURE BUT
EQUAL CHANCES OF ABOVE AND BELOW NORMAL 3-MONTH PRECIPITATION OVER
ALL OF UPPER MICHIGAN IN JULY THROUGH SEPTEMBER 2014.

GO TO HTTP://WWW.WEATHER.GOV/CLIMATE/L3MTO.PHP TO ACCESS DETAILED
LOCAL THREE-MONTH AVERAGE TEMPERATURE OUTLOOKS FOR A NUMBER OF SITES
IN UPPER MICHIGAN.

CHECK OUT HTTP://WWW.CPC.NCEP.NOAA.GOV FOR MORE INFORMATION ABOUT
THE CLIMATE PREDICTION CENTER AND MORE LONG RANGE PREDICTIONS.

NOTE THAT STATISTICS FOR THE NATIONAL WEATHER SERVICE OFFICE IN
NEGAUNEE TOWNSHIP ARE BASED ON RECORDS WHICH BEGAN IN OCTOBER 1961.
THIRTY YEAR NORMALS USED ARE FOR THE PERIOD OF 1981 THROUGH 2010.
NOTE ALL TEMPERATURES ARE IN FAHRENHEIT AND PRECIPITATION IS IN
INCHES. ALL CLIMATE DATA LISTED IN THIS PRODUCT ARE UNOFFICIAL. FOR
OFFICIAL DATA...PLEASE REFER TO THE NATIONAL CLIMATIC DATA CENTER.
ALSO NOTE THIS DISCUSSION DOES NOT INCLUDE DATA FROM CHIPPEWA AND
MACKINAC COUNTIES.

NWS MARQUETTE WEB PAGE IS AT HTTP://WWW.WEATHER.GOV/MQT (ALL LOWER
CASE). CONTACT THE NATIONAL CLIMATIC DATA CENTER AT (828) 271-4800
OR WWW.NCDC.NOAA.GOV.

$$

KC





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