Climatological Report (Monthly)
Issued by NWS Marquette, MI

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CLMMQT

CLIMATE REPORT...FINAL
NATIONAL WEATHER SERVICE MARQUETTE MI
330 PM EDT WED MAY 24 2017

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

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF APRIL 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1961 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              92   04/22/1980
 LOW               -9   04/06/2003
HIGHEST            71   04/25        46      25       78  04/17
LOWEST             14   04/12        27     -13       -7  04/05
AVG. MAXIMUM     49.8              47.8     2.0     43.5
AVG. MINIMUM     29.8              28.0     1.8     24.2
MEAN             39.8              37.9     1.9     33.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      2               2.6    -0.6        8
DAYS MIN <= 32     24              21.1     2.9       26
DAYS MIN <= 0       0               0.1    -0.1        1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.56   1985
 MINIMUM         0.90   1998
TOTALS           5.40              3.01    2.39     3.83
DAILY AVG.       0.18              0.10    0.08     0.13
DAYS >= .01        14              12.2     1.8       17
DAYS >= .10         9               6.9     2.1        8
DAYS >= .50         6               1.7     4.3        2
DAYS >= 1.00        1               0.6     0.4        1
GREATEST
 24 HR. TOTAL    1.15   04/09 TO 04/10

SNOWFALL (INCHES)
RECORDS
 TOTAL           55.2   2007
                        0
                        0
TOTALS           12.1              14.5    -2.4     40.9
SINCE 7/1       153.1             201.8   -48.7    159.8
SNOWDEPTH AVG.      1                11     -10        7
DAYS >= 1.0         2               3.3    -1.3       10
GREATEST
 SNOW DEPTH         7   04/12                         20  04/10
                        04/11                             04/09
 24 HR TOTAL      9.0   04/11 TO 04/11

DEGREE_DAYS
HEATING TOTAL     748               815     -67      927
 SINCE 7/1       7684              8702   -1018     7790
COOLING TOTAL       0                 1      -1        0
 SINCE 1/1          0                 1      -1        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    71/225    DATE  04/10

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              0     MIXED PRECIP               1
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN               16     FREEZING RAIN              1
LT FREEZING RAIN          3     HAIL                       1
HEAVY SNOW                1     SNOW                       1
LIGHT SNOW                9     SLEET                      2
FOG                       8     FOG W/VIS <= 1/4 MILE      5
HAZE                      0

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

&&

...APRIL 2017 MONTHLY CLIMATE SUMMARY FOR UPPER MICHIGAN...
/THIS DISCUSSION DOES NOT INCLUDE CHIPPEWA AND MACKINAC COUNTIES/

...ABOVE NORMAL PRECIPITATION AT MOST PLACES...
...RECORD WETTEST APRIL AT MUNISING...
...SECOND WETTEST APRIL AT IRON MOUNTAIN...
...FOURTH WETTEST APRIL AT THE MARQUETTE NWS...
...SEVENTH WETTEST APRIL AT MARQUETTE CITY...
...NINTH WETTEST APRIL AT IRONWOOD...
...TENTH WETTEST APRIL AT HOUGHTON...

...ABOVE NORMAL MONTHLY AVERAGE TEMPERATURE...

...GENERALLY BELOW NORMAL SNOWFALL...

APRIL CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         39.8     37.9   PLUS    1.9
AVERAGE HIGH TEMPERATURE    49.8     47.8   PLUS    2.0
AVERAGE LOW TEMPERATURE     29.8     28.0   PLUS    1.8
HEATING DEGREE DAYS          748      815  MINUS     67
COOLING DEGREE DAYS            0        1  MINUS      1
TOTAL PRECIPITATION         5.40     3.01   PLUS   2.39
TOTAL SNOWFALL              12.1     14.5  MINUS    2.4

HIGHEST TEMPERATURE:                    71 ON 4/25
LOWEST TEMPERATURE:                     14 ON 4/12
GREATEST CALENDAR DAY PRECIPITATION:  1.00 ON 4/10
GREATEST 24 HOUR PRECIPITATION:       1.15 ON 4/9-4/10
GREATEST CALENDAR DAY SNOWFALL:        9.0 ON 4/11
GREATEST 24 HOUR SNOWFALL:             9.0 ON 4/11
GREATEST SNOW DEPTH:                     7 ON 4/11 AND 4/12
PEAK WIND SPEED: 71 MPH FROM THE SOUTHWEST ON 4/10

FOURTH HIGHEST APRIL PRECIPITATION...5.40 (RECORD 6.56...1985)
---------------------------------------------------------------------
      ...AUGUST THROUGH APRIL VERY WARM AT THE MARQUETTE NWS...

                         AVERAGE TEMPERATURE

              OBSERVED NORMAL DEPARTURE     RECORD          RANK
MARQUETTE NWS   37.1    33.8    +3.3    38.5 /2011-12/   2ND WARMEST
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                             LAKE SUPERIOR  LAKE MICHIGAN-HURON
04/01/17 DAILY MEAN          601.59/183.37     579.29/176.57
04/30/17 DAILY MEAN          602.03/183.50     579.86/176.74
AVG MAR 2017 DAILY MEAN      601.66/183.39     579.17/176.53
AVG APR 2016 DAILY MEAN      601.96/183.48     579.94/176.77
LONG TERM APR DAILY MEAN     601.25/183.26     578.67/176.38
MAXIMUM APR DAILY MEAN       602.62/183.68     581.46/177.23
                                 (1986)           (1986)
MINIMUM APR DAILY MEAN       599.48/182.72     576.15/175.61
                                 (1926)           (1964)

...WATER LEVELS RISE AND REMAIN ABOVE NORMAL IN APRIL...

RUNOFF FROM MELTING SNOW AND MODERATE TO HEAVY PRECIPITATION DURING
THE MONTH RESULTED IN RISING WATER LEVELS IN APRIL. AT THE END OF
APRIL, WATER LEVELS ON LAKE SUPERIOR WERE 2 TO 3 INCHES ABOVE NORMAL
AND NEAR THE SAME LEVEL OBSERVED IN APRIL 2016. THE LEVEL ON LAKES
MICHIGAN AND HURON WERE 4 TO 5 INCHES ABOVE NORMAL AND ALSO NEAR THE
LEVEL OBSERVED THE PREVIOUS APRIL.

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.
---------------------------------------------------------------------
                       APRIL CLIMATE HIGHLIGHTS

HIGHEST REPORTED TEMPERATURE...76 AT KENTON IN HOUGHTON COUNTY
                                ON 4/25

LOWEST REPORTED TEMPERATURE...12 AT CLARKSBURG IN MARQUETTE COUNTY,
                               STAMBAUGH IN IRON COUNTY, AND NEAR
                               COVINGTON IN BARAGA COUNTY ON 4/12

HIGHEST AVERAGE TEMPERATURE...43.8 DEGREES AT NORWAY IN DICKINSON
                               COUNTY

LOWEST AVERAGE TEMPERATURE...37.5 DEGREES AT HERMAN IN BARAGA COUNTY

HIGHEST MONTHLY PRECIPITATION...6.27 INCHES AT IRON MOUNTAIN

LOWEST MONTHLY PRECIPITATION...2.10 INCHES AT NEWBERRY

HIGHEST MONTHLY SNOWFALL...15.5 INCHES AT ATLANTIC MINE IN HOUGHTON
                            COUNTY

LOWEST MONTHLY SNOWFALL...TRACE AT SEVERAL SITES NEAR THE BAY OF
                           GREEN BAY AND LAKE MICHIGAN

GREATEST MONTHLY SNOW DEPTH...21 INCHES AT GRAND MARAIS IN ALGER
                               COUNTY ON 4/1


WHILE THE THE WEATHER DURING THE FIRST WEEK OF APRIL TENDED TO BE
RELATIVELY UNEVENTFUL AND DRY OVER UPPER MICHIGAN, A MORE WET,
ACTIVE PATTERN DOMINATED THE LAST THREE WEEKS OF THE MONTH AS
NUMEROUS DISTURBANCES EMBEDDED IN A FAST WEST-TO-SOUTHWEST FLOW
ALOFT BETWEEN AN UPPER TROUGH OVER THE WEST AND SOME RIDGING OVER
THE SOUTHEAST STATES IMPACTED THE UPPER GREAT LAKES. AS A RESULT,
MONTHLY PRECIPITATION ENDED UP ABOVE TO WELL ABOVE NORMAL AT MOST
PLACES, ESPECIALLY OVER THE CENTRAL U.P. PRECIPITATION TOTALS OF 5
INCHES OR MORE WERE COMMON IN A SWATH FROM WATERSMEET IN GOGEBIC
COUNTY AND NORWAY IN DICKINSON COUNTY TO NEAR MARQUETTE AND
MUNISING. IRON MOUNTAIN LED REPORTING STATIONS WITH 6.27 INCHES OF
WATER EQUIVALENT PRECIPITATION, THE SECOND HIGHEST APRIL TOTAL ON
RECORD AND ABOUT 265 PERCENT OF THE MONTHLY NORMAL FOR THAT SITE.
THE 6.18 INCHES THAT FELL ON MUNISING WAS AN APRIL RECORD AND 280
PERCENT OF NORMAL. MOST PLACES EXPERIENCED A TOP TEN WETTEST APRIL
IN 2017. THE ONLY AREA THAT TENDED TO MISS OUT ON THE HEAVIER
PRECIPITATION WAS OVER THE EAST. NEWBERRY MEASURED ONLY 2.10 INCHES,
JUST A BIT BELOW THEIR APRIL MEAN.

AS HAS BEEN THE CASE FOR THE PAST COUPLE OF MONTHS, THE APRIL 2017
WEATHER PATTERN ACROSS THE UPPER GREAT LAKES WAS A CHANGEABLE ONE IN
TERMS OF TEMPERATURES. MOST OF THE FIRST HALF OF THE MONTH WAS
WARMER THAN NORMAL, BUT THE SECOND HALF OF APRIL THEN TURNED COOLER
THAN AVERAGE MOST OF THE TIME. SINCE THE WARMER TEMPERATURE
ANOMALIES WERE MORE EXTREME, THE OBSERVED MEAN APRIL AVERAGE
TEMPERATURE BETWEEN 37 AND 44 DEGREES ENDED UP 1 TO 3 DEGREES ABOVE
NORMAL ACROSS THE UPPER PENINSULA. APRIL ON AVERAGE ENDED UP 13 TO
17 DEGREES WARMER THAN MARCH 2017.

AT LEAST ONE SPOT IN UPPER MICHIGAN SAW THE THERMOMETER DIP INTO THE
TEENS DURING THE EARLY MORNINGS ON 4/7, 4/8 AND 4/12. READINGS
PEAKED IN THE 70S ON 4/8, 4/9, 4/22 AND 4/25. DURING THE COLDER
TIMES WHEN SKIES WERE CLOUDY AND SNOW WAS FALLING OVER MAINLY THE
NORTHWEST HALF OF THE UPPER PENINSULA, A FEW PLACES REPORTED A
MAXIMUM TEMPERATURE NO HIGHER THAN THE 20S ON 4/11 AND 4/27.
---------------------------------------------------------------------
 ...AUGUST THROUGH APRIL VERY WARM AND WET ACROSS UPPER MICHIGAN...

         ...TOP 5 WARMEST AND 20 WETTEST AT MOST PLACES...

                         AVERAGE TEMPERATURE

              OBSERVED NORMAL DEPARTURE    RECORD           RANK
MANISTIQUE      40.0    36.5    +3.5   39.8 /2011-12/ RECORD WARMEST

HOUGHTON        38.8    34.5    +4.3   39.3 /2011-12/    2ND WARMEST

IRON MOUNTAIN   39.4    35.8    +3.6   40.3 /2011-12/    2ND WARMEST

NEWBERRY        39.8    36.3    +3.5   41.0 /2011-12/    2ND WARMEST

MARQUETTE NWS   37.1    33.8    +3.3   38.5 /2011-12/    2ND WARMEST

MUNISING        39.1    36.6    +2.5   40.0 /2011-12/    3RD WARMEST

MARQUETTE CITY  40.7    37.9    +2.8   43.2 /1877-88/    5TH WARMEST

IRONWOOD        36.8    33.5    +3.3   38.5 /2011-12/    7TH WARMEST

                            PRECIPITATION

              OBSERVED NORMAL DEPARTURE     RECORD          RANK
MANISTIQUE     28.00   21.45    +6.55  32.59 /1978-79/   4TH HIGHEST

IRON MOUNTAIN  25.74   19.75    +5.99  29.75 /1995-96/   4TH HIGHEST

MARQUETTE CITY 26.76   21.10    +5.66  34.76 /1988-89/  12TH HIGHEST

HOUGHTON       30.69   20.22   +10.47  38.16 /1985-86/  15TH HIGHEST

IRONWOOD       28.41   24.04    +4.37  33.05 /2015-16/  15TH HIGHEST

MARQUETTE NWS  28.85   26.95    +1.90  36.97 /1985-86/  16TH HIGHEST

NEWBERRY       27.54   25.52    +2.02  42.42 /2001-02/  17TH HIGHEST

**** RANK NOT IN TOP 25
---------------------------------------------------------------------
SOME OTHER TEMPERATURE AND PRECIPITATION OBSERVATIONS ACROSS UPPER
MICHIGAN IN APRIL 2017 INCLUDE:

IRONWOOD...AVERAGE TEMPERATURE 40.3 /1.0 DEGREE ABOVE NORMAL/
           PRECIPITATION 4.67 INCHES /2.03 INCHES ABOVE NORMAL/
           SNOWFALL 5.6 INCHES /5.8 INCHES BELOW NORMAL/

WATERSMEET (GOGEBIC COUNTY)...PRECIPITATION 5.11 INCHES
                              SNOWFALL 5.6 INCHES

GREENLAND (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 40.0 DEGREES
                               PRECIPITATION 4.37 INCHES
                               SNOWFALL 5.8 INCHES

BERGLAND DAM (ONTONAGON COUNTY)...AVERAGE TEMPERATURE 39.7 DEGREES
                                  PRECIPITATION 5.16 INCHES
                                  SNOWFALL 6.8 INCHES

HOUGHTON COUNTY...AVERAGE TEMPERATURE 40.6 (2.6 DEGREES ABOVE NORMAL)
AIRPORT           PRECIPITATION 4.20 INCHES (2.36 INCHES ABOVE
NORMAL)                   SNOWFALL 8.6 INCHES (0.8 INCH ABOVE NORMAL)

ATLANTIC MINE (HOUGHTON COUNTY)...PRECIPITATION 4.90 INCHES
                                  SNOWFALL 15.5 INCHES

PAINESDALE (HOUGHTON COUNTY)...SNOWFALL 11.3 INCHES

COPPER HARBOR...AVERAGE TEMPERATURE 39.8 DEGREES
                PRECIPITATION 3.76 INCHES
                SNOWFALL 1.0 INCH

JACOBSVILLE (HOUGHTON COUNTY)...AVERAGE TEMPERATURE 38.5 DEGREES
                                PRECIPITATION 4.91 INCHES
                                SNOWFALL 3.9 INCHES

BARAGA...AVERAGE TEMPERATURE 41.3 DEGREES
         PRECIPITATION 4.00 INCHES
         SNOWFALL 2.5 INCHES

HERMAN (BARAGA COUNTY)...AVERAGE TEMPERATURE 37.5 DEGREES
                         PRECIPITATION 4.27 INCHES
                         SNOWFALL 12.0 INCHES

CLARKSBURG (MARQUETTE COUNTY)...AVERAGE TEMPERATURE 38.8 DEGREES
                                PRECIPITATION 3.55 INCHES
                                SNOWFALL 5.3 INCHES

BIG BAY (MARQUETTE COUNTY)...PRECIPITATION 4.97 INCHES
                             SNOWFALL 8.5 INCHES

MARQUETTE CITY...AVERAGE TEMPERATURE 41.0 (0.9 DEGREE ABOVE NORMAL)
                 PRECIPITATION 4.54 INCHES (2.09 INCHES ABOVE NORMAL)
                 SNOWFALL 7.3 INCHES (0.2 INCH BELOW NORMAL)

CHATHAM (ALGER COUNTY)...AVERAGE TEMPERATURE 40.6 DEGREES
                         PRECIPITATION 5.25 INCHES
                         SNOWFALL 2.5 INCHES

MUNISING...AVERAGE TEMPERATURE 40.0 (1.0 DEGREE ABOVE NORMAL)
           PRECIPITATION 6.18 INCHES (3.98 INCHES ABOVE NORMAL)
           SNOWFALL 4.1 INCHES /3.5 INCHES BELOW NORMAL/

NEWBERRY...AVERAGE TEMPERATURE 41.8 (1.9 DEGREES ABOVE NORMAL)
           PRECIPITATION 2.10 INCHES (0.12 INCH BELOW NORMAL)
           SNOWFALL 0.5 INCH (6.6 INCHES BELOW NORMAL)

STAMBAUGH (IRON COUNTY)...AVERAGE TEMPERATURE 39.8 DEGREES
                          PRECIPITATION 6.25 INCHES
                          SNOWFALL 8.8 INCHES

AMASA (IRON COUNTY)...PRECIPITATION 5.90 INCHES
                      SNOWFALL 13.0 INCHES

FORD AIRPORT...AVERAGE TEMPERATURE 43.3 DEGREES
 NEAR IRON MOUNTAIN

IRON MOUNTAIN...AVERAGE TEMPERATURE 43.4 (1.9 DEGREES ABOVE NORMAL/
                PRECIPITATION 6.27 INCHES /3.91 INCHES ABOVE NORMAL/
                SNOWFALL 1.0 INCH /3.6 INCHES BELOW NORMAL/

NORWAY (DICKINSON COUNTY)...AVERAGE TEMPERATURE 43.8 DEGREES
                    PRECIPITATION 6.19 INCHES
                    SNOWFALL 1.0 INCH

DAGGETT (MENOMINEE COUNTY)...PRECIPITATION 4.68 INCHES

ESCANABA...PRECIPITATION 3.17 INCHES
           SNOWFALL TRACE

GLADSTONE (DELTA COUNTY)...PRECIPITATION 4.42 INCHES
                           SNOWFALL 0.4 INCH

GARDEN CORNERS (DELTA COUNTY)...AVERAGE TEMPERATURE 41.0 DEGREES
                                PRECIPITATION 3.97 INCHES
                                SNOWFALL TRACE

COOKS (SCHOOLCRAFT COUNTY)...PRECIPITATION 3.56 INCHES
                             SNOWFALL 0.4 INCH

MANISTIQUE...AVERAGE TEMPERATURE 40.3 /1.5 DEGREES ABOVE NORMAL/
             PRECIPITATION 3.04 INCHES /0.65 INCH ABOVE NORMAL/
             SNOWFALL TRACE /2.6 INCHES BELOW NORMAL/

                        APRIL WEATHER SUMMARY

THE WEATHER THE FIRST FEW DAYS OF APRIL WAS RELATIVELY UNEVENTFUL AS
A WEAK HIGH PRESSURE DOMINATED. WEAK DISTURBANCES PASSED THROUGH THE
UPPER GREAT LAKES ON 4/1 AND DURING THE NIGHT ON 4/2-4/3. LITTLE IF
ANY RAIN FELL ON 4/1, BUT BERGLAND DAM IN ONTONAGON COUNTY REPORTED
0.14 INCH ON 4/2-4/3 ACCOMPANYING THE PASSAGE OF THE SECOND
DISTURBANCE.

A DEEPER LOW PRESSURE PASSING TO THE SOUTHEAST ON 4/3 INTO 4/4
DROPPED UP TO 0.23 INCH OF RAIN AT COOKS IN SCHOOLCRAFT COUNTY AND
ALSO CAUSED SOME PATCHY DENSE FOG OVER THE HIGHER TERRAIN OF THE
NORTH CENTRAL. LOCATIONS ACROSS THE NORTHWEST HALF OF THE U.P. SAW
NO MORE THAN ABOUT 0.10 INCH, AND MANY PLACES OVER THE KEWEENAW HAD
NO RAIN AT ALL DURING THIS EVENT. TRAILING HIGH PRESSURE BROUGHT DRY
WEATHER ON 4/5, BUT THERE WAS A GOOD DEAL OF HIGH CLOUD COVER ON THE
NORTHERN FLANK OF A LOW PRESSURE MOVING FROM THE PLAINS TOWARD THE
LOWER GREAT LAKES. ALTHOUGH THIS LOW PRESSURE SYSTEM PASSING THROUGH
THE SOUTHEAST GREAT LAKES ON 4/6 STAYED FAR ENOUGH AWAY SO THAT THE
ENTIRE UPPER PENINSULA MISSED ANY ACCOMPANYING RAIN, NORTH WINDS
GUSTED AS HIGH AS 40 TO 45 MPH ON 4/6 UNDER THE SHARP PRESSURE
GRADIENT BETWEEN THIS DEEPENING LOW AND HIGH PRESSURE STRETCHING
FROM NORTHWEST ONTARIO INTO THE PLAINS. THESE STRONG WINDS SLOWLY
DIMINISHED WITH THE CLOSER APPROACH OF THE RIDGE DURING THE NIGHT ON
4/6-4/7.

MEAN DAILY TEMPERATURES ON 4/1 THROUGH 4/3 AVERAGED 10 TO 15 DEGREES
ABOVE NORMAL. THE STEADY TO GUSTY NORTH TO NORTHWEST WINDS THAT DREW
COOLER AIR INTO THE UPPER LAKES FOLLOWING THE TWO LOW PRESSURE
SYSTEMS ON 4/3 INTO 4/4 AND 4/6 DROPPED THE AVERAGE TEMPERATURES ON
4/4 THROUGH 4/7 TO ABOUT 5 DEGREES ABOVE THE MEAN. AFTER THE
TRAILING HIGH PRESSURE RIDGE PASSED TO THE EAST ON 4/8, GUSTY SOUTH
WINDS UP TO 30 MPH ADVECTED MUCH WARMER AIR INTO THE UPPER LAKES,
RAISING MEAN DAILY TEMPERATURES TO AROUND 15 DEGREES ABOVE NORMAL
ON 4/8 AND 20 TO 25 DEGREES ABOVE AVERAGE ON 4/9.

THE FIRST SIGNIFICANT WEATHER EVENT OF THE MONTH OCCURRED FROM THE
EVENING ON 4/9 INTO THE EARLY MORNING HOURS OF 4/10. AS A COLD FRONT
STALLED OVER THE UPPER GREAT LAKES, AN APPROACHING DISTURBANCE
EMBEDDED IN THAT WEST-TO-SOUTHWEST FLOW ALOFT INTERACTED WITH THE
WARM AND RATHER MOIST AIRMASS IN PLACE TO TRIGGER AN AREA OF SHOWERS
AND SOME THUNDERSTORMS. SOME OF THE THUNDERSTORMS TURNED SEVERE OVER
THE CENTRAL COUNTIES, PRODUCING SOME DAMAGING WINDS AND LARGE HAIL.
THE NATIONAL WEATHER SERVICE OFFICE IN NEGAUNEE TOWNSHIP IN
MARQUETTE COUNTY REPORTED A PEAK WIND OF 71 MPH. TREES DOWNED BY
THESE DAMAGING WINDS FELLED POWER LINES, RESULTING IN POWER OUTAGES
THAT LASTED FOR A FEW DAYS AT SOME LOCATIONS. HAIL AS LARGE AS GOLF
BALLS FELL NEAR LITTLE LAKE IN MARQUETTE COUNTY. THERE WAS ALSO SOME
HEAVY RAIN, WITH OVER AN INCH OF PRECIPITATION FALLING AT SOME
LOCATIONS. STAMBAUGH IN IRON COUNTY LOGGED THE MOST RAIN WITH 1.57
INCHES.

IN THE WAKE OF THE DISTURBANCE RESPONSIBLE FOR THE STORMS, THE
STALLED FRONT SLIPPED JUST TO THE SOUTH INTO THE CENTRAL GREAT LAKES
LATER ON 4/10. AS ANOTHER DISTURBANCE AND WAVE OF LOW PRESSURE MOVED
NORTHEAST ALONG THIS BOUNDARY, A WINTRY MIX OF SNOW, SLEET, FREEZING
RAIN AND RAIN OVERSPREAD ALL BUT NORTHWEST UPPER MICHIGAN DURING THE
EARLY MORNING ON 4/11. BY THE TIME THE PRECIPITATION ENDED AROUND
MID-DAY ON 4/11, OVER 6 INCHES OF WET SNOW HAD FALLEN AT MANY PLACES
ACROSS THE CENTRAL FROM NEAR IRON RIVER TO NEGAUNEE. AMASA IN IRON
COUNTY AS WELL AS NEGAUNEE AND ISHPEMING IN MARQUETTE COUNTY WERE
BURIED UNDER 10 INCHES OF THE WHITE STUFF. MOST PLACES PICKED UP
0.50 TO 1.00 INCH OF WATER EQUIVALENT PRECIPITATION. THE ONLY
EXCEPTION WAS OVER THE NORTHWEST, WHERE LESS THAN 0.10 INCH OF
PRECIPITATION AND LITTLE IF ANY SNOW FELL ACROSS THE KEWEENAW.
FOLLOWING THE COOL PUSH BEHIND THE EXITING COLD FRONT ON 4/10, MEAN
DAILY TEMPERATURES ON THAT DAY FELL WITHIN A FEW DEGREES OF NORMAL.
THE MERCURY AVERAGED 5 TO 10 DEGREES BELOW NORMAL ON 4/11 DURING THE
LATE SEASON MIXED PRECIPITATION EVENT.

A HIGH PRESSURE RIDGE THAT DOMINATED ON 4/12 INTO 4/14 BROUGHT A
RETURN OF GENERALLY DRY WEATHER. AS SKIES CLEARED FOLLOWING THE EXIT
OF THE LOW PRESSURE RESPONSIBLE FOR THE WINTRY PRECIPITATION ON
4/11, TEMPERATURES DURING THE NIGHT OF 4/11-4/12 FELL SHARPLY WELL
INTO THE TEENS AT THE INTERIOR COLD SPOTS AND AS LOW AS THE MONTHLY
MINIMUM OF 12 AT CLARKSBURG IN MARQUETTE COUNTY, STAMBAUGH IN IRON
COUNTY, AND NEAR COVINGTON IN BARAGA COUNTY ON 4/12. THERE WERE SOME
CLOUDS AND EVEN A FEW SPRINKLES OVER THE SOUTH CENTRAL DURING THE
NIGHT ON 4/12-4/13 AS A DISTURBANCE PASSED ACROSS WISCONSIN, BUT THE
SURFACE HIGH PRESSURE LIMITED THE COVERAGE AND INTENSITY OF THE
PRECIPITATION. MEAN DAILY TEMPERATURES THAT AVERAGED UP TO 5 DEGREES
BELOW NORMAL ON 4/12 REBOUNDED TO 5 TO 10 DEGREES ABOVE AVERAGE ON
4/13 AND 4/14.

AN AREA OF SHOWERS AHEAD OF A LOW PRESSURE SYSTEM AND WARM FRONT
APPROACHING FROM THE SOUTHWEST ARRIVED DURING THE NIGHT ON 4/14-4/15
AND THEN OVERSPREAD THE REST OF UPPER MICHIGAN DURING THE DAY ON
4/15. BY THE TIME THE SHOWERS AND EVEN A FEW THUNDERSTORMS
DIMINISHED IN THE EVENING, MOST PLACES HAD PICKED UP AT LEAST 0.25
TO 0.50 INCH OF RAIN. IRONWOOD REPORTED THE MOST WITH 1.11 INCHES.
ONCE AGAIN, THE KEWEENAW MISSED OUT ON THE HEAVIER PRECIPITATION AND
SAW UNDER 0.25 INCH. AFTER THE RAIN DIMINISHED, SOME LOCALLY DENSE
FOG FORMED AND PERSISTED INTO THE MORNING ON 4/16, EASTER SUNDAY.
THE THERMOMETER AVERAGED 10 TO 15 DEGREES ABOVE NORMAL ON 4/15
BEFORE READINGS DIPPED TO BETWEEN AVERAGE AND 5 DEGREES ABOVE NORMAL
ON 4/16.

THE WEATHER TURNED EVEN COOLER ON 4/17 FOLLOWING THE PASSAGE OF A
STRONG COLD FRONT DURING THE NIGHT ON 4/16-4/17 THAT RESULTED IN
SOME DENSE FOG AS WELL AS A FEW RAIN AND SNOW SHOWERS NEAR LAKE
SUPERIOR. ALTHOUGH THE FOG DISSIPATED BY SUNRISE ON 4/17, AN
APPROACHING UPPER DISTURBANCE CONTINUED SOME LIGHT RAIN AND SNOW
SHOWERS ON THAT DAY. OVER THE HIGHER TERRAIN OF THE NORTH CENTRAL,
HIGH TEMPERATURES ON 4/17 WERE HARD PRESSED TO RISE ABOVE FREEZING,
WHICH RESULTED IN AN AVERAGE DAILY TEMPERATURE BETWEEN 5 AND 10
DEGREES BELOW NORMAL. A STRONG UPPER DISTURBANCE AND ACCOMPANYING
SURFACE LOW PRESSURE APPROACHING FROM THE WEST TRACKED ACROSS UPPER
MICHIGAN ON 4/18, BRINGING A PERIOD OF SHOWERS THAT DROPPED UP TO
0.25 TO 0.50 INCH OF RAIN ACROSS THE NORTHWEST HALF OF THE U.P.
COPPER HARBOR AND A SITE NEAR CALUMET REPORTED THE MOST RAIN WITH
0.52 INCH. MUCH LESS PRECIPITATION WITH TOTALS UNDER 0.10 INCH FELL
OVER THE SOUTHEAST FROM MENOMINEE TO NEWBERRY. AFTER THE
PRECIPITATION DIMINISHED DURING THE NIGHT ON 4/18-4/19, MOSTLY
CLOUDY SKIES LINGERED THROUGH 4/19. THE WEATHER ON 4/18 AND 4/19 WAS
SEASONABLY CHILLY WITH AVERAGE TEMPERATURES RANGING FROM NEAR NORMAL
TO 5 DEGREES BELOW AVERAGE.

DURING THE NIGHT ON 4/19-4/20, RAIN, MIXED WITH SNOW OVER THE HIGHER
TERRAIN OF THE NORTHWEST HALF, DEVELOPED OVER THE U.P. IN ADVANCE OF
THE NEXT LOW PRESSURE MOVING FROM THE PLAINS TOWARD THE WESTERN
GREAT LAKES. THIS PRECIPITATION DIMINISHED BY THE MORNING HOURS ON
4/21, TENDING TO LINGER LONGEST OVER THE HIGHER TERRAIN OF THE NORTH
CENTRAL. A NUMBER OF LOCATIONS PICKED UP AN INCH OR MORE OF LIQUID
EQUIVALENT PRECIPITATION, WITH AS MUCH AS 1.65 INCHES FALLING AT
IRON MOUNTAIN. WHERE THERE WAS ACCUMULATING WET SNOW OVER THE HIGHER
TERRAIN OF THE NORTHWEST HALF, ATLANTIC MINE IN HOUGHTON COUNTY
REPORTED 5.0 INCHES ACCUMULATION. TRAILING HIGH PRESSURE BROUGHT
CLEARING ON 4/21. THE THERMOMETER READ ABOUT 5 DEGREES BELOW NORMAL
ON 4/20 AND THEN NEAR AVERAGE ON 4/21 WITH THE RETURN OF SOME
SUNSHINE.

DRY WEATHER PREVAILED ACROSS UPPER MICHIGAN ON 4/22 AS THE HIGH
PRESSURE RIDGE CROSSED THE AREA. A SHARP COLD FRONT THEN CROSSED THE
UPPER LAKES DURING THE EARLY MORNING ON 4/23, ACCOMPANIED BY SOME
RAIN AND SNOW SHOWERS OVER MAINLY THE NORTH HALF. AS MUCH AS 1 TO 2
INCHES OF SNOW ACCUMULATED ACROSS THE HIGHER TERRAIN OF THE KEWEENAW
INTO THE DAY ON 4/23, WHEN DRY AIR SPREADING INTO THE UPPER LAKES
AHEAD OF HIGH PRESSURE BUILDING ACROSS SOUTH CENTRAL CANADA CAUSED
SOME CLEARING. TEMPERATURES AVERAGED AROUND 5 DEGREES ABOVE NORMAL
ON 4/22 BUT THEN DROPPED TO ABOUT 5 DEGREES BELOW AVERAGE ON 4/23.

GUSTY SOUTHEAST WINDS UP TO 25 TO 30 MPH ON THE WESTERN FLANK OF THE
HIGH PRESSURE DEPARTING TO THE EAST ADVECTED WARMER AIR BACK INTO
THE AREA ON 4/24, LIFTING THE MEAN DAILY TEMPERATURE BACK TO NEAR 5
DEGREES ABOVE NORMAL DESPITE THE ARRIVAL OF SOME CLOUDS AHEAD OF A
LOW PRESSURE MOVING THROUGH THE NORTHERN PLAINS. A FEW LIGHT SHOWERS
FELL OVER WESTERN UPPER MICHIGAN DURING THE NIGHT ON 4/24-4/25 AHEAD
OF THIS LOW. DRY AND EVEN WARMER WEATHER THEN PREVAILED ON 4/25
UNDER THE PERSISTENT SOUTH TO SOUTHEAST FLOW BETWEEN THE DEPARTING
SURFACE HIGH AND AN APPROACHING COLD FRONT THAT ARRIVED OVER THE
WEST LATER IN THE DAY BUT THEN STALLED ACROSS THE CENTRAL DURING THE
NIGHT ON 4/25-4/26. THE MERCURY AVERAGED 10 TO 15 DEGREES ABOVE
NORMAL ON 4/25, WHEN TEMPERATURES PEAKED IN THE 70S AWAY FROM THE
COOLING INFLUENCE OF THE GREAT LAKES AND AS HIGH AS THE APRIL
MAXIMUM OF 76 AT KENTON IN SOUTHERN HOUGHTON COUNTY.

THERE WAS ANOTHER ROUND OF HEAVY PRECIPITATION FROM EARLY ON 4/26
INTO 4/28 AS A PAIR OF LOW PRESSURE SYSTEMS, ASSOCIATED WITH
DISTURBANCES MOVING THROUGH THE SOUTHWEST FLOW ALOFT BETWEEN A
DEEPENING TROUGH OVER THE WEST AND UPPER RIDGING ACROSS THE EAST,
MOVED ALONG THE STALLED FRONT ALIGNED SOUTH TO NORTH OVER THE WEST
CENTRAL GREAT LAKES. THE PRECIPITATION WAS A WINTRY MIX OF SNOW,
SLEET, FREEZING RAIN AND RAIN OVER THE WEST THAT TENDED TO CHANGE TO
ALL SNOW ON 4/27 AS COLDER AIR SURGED INTO THE AREA. BY THE TIME
LINGERING SNOW SHOWERS ENDED ON 4/28, MANY LOCATIONS ACROSS THE WEST
HAD PICKED UP OVER 2 INCHES OF WATER EQUIVALENT PRECIPITATION.
GREENLAND IN ONTONAGON COUNTY HAD THE HIGHEST TOTAL AT 2.43 INCHES.
ATLANTIC MINE HAD THE MOST SNOW AGAIN WITH 7.0 INCHES. GREENLAND AND
HOUGHTON WERE CLOSE BEHIND WITH 5.3 INCHES AND 5.0 INCHES
RESPECTIVELY DURING THIS EVENT. THE MEAN DAILY TEMPERATURE AVERAGED
5 TO 10 DEGREES ABOVE NORMAL ON 4/26. ON 4/27, THERE WAS A SHARP
DIFFERENCE OF AVERAGE TEMPERATURE BETWEEN ABOUT 15 DEGREES BELOW
NORMAL ON 4/27 TO AROUND 5 DEGREES ABOVE AVERAGE OVER THE EAST ON
THE WARM SIDE OF THE STALLED FRONT. THE MERCURY WAS UP TO 20 DEGREES
BELOW NORMAL OVER THE WEST ON 4/28 TO 5 TO 10 DEGREES BELOW AVERAGE
ACROSS THE EAST. THE HIGH TEMPERATURE AT IRONWOOD ON 4/28 WAS A
DAILY RECORD LOW 26 DEGREES WITH CLOUDS AND A CHILLY NORTHWEST FLOW
BEHIND THE SLOWLY DEPARTING LOW PRESSURE SYSTEM.

CANADIAN HIGH PRESSURE BUILDING TOWARD THE UPPER GREAT LAKES
DELIVERED DRY BUT CHILLY WEATHER ON 4/29 INTO 4/30. THERE WAS A GOOD
DEAL OF HIGH CLOUD SPILLING OVER UPPER MICHIGAN TO THE NORTH OF A
DEVELOPING LOW PRESSURE IN THE CENTRAL PLAINS. THICKER CLOUDS AHEAD
OF THIS SLOWLY ADVANCING LOW PRESSURE OVERSPREAD THE U.P. LATER ON
4/30, AND THERE EVEN A FEW SHOWERS OVER THE SOUTHERN TIER COUNTIES
LATER IN THE DAY. MEAN DAILY TEMPERATURES ON 4/29 AND 4/30 WERE 5 TO
10 DEGREES BELOW NORMAL.
---------------------------------------------------------------------
                            JUNE FORECAST

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING EQUAL CHANCES OF
AN ABOVE AND BELOW NORMAL MONTHLY MEAN TEMPERATURE AND PRECIPITATION
ACROSS ALL OF UPPER MICHIGAN IN JUNE 2017.

                           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 12:24 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 AN ABOVE NORMAL 3-MONTH AVERAGE TEMPERATURE
BUT EQUAL CHANCES OF ABOVE AND BELOW NORMAL 3-MONTH PRECIPITATION
ACROSS ALL OF UPPER MICHIGAN IN JULY THROUGH SEPTEMBER 2017.
---------------------------------------------------------------------

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.

THE 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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