Climatological Report (Monthly)
Issued by NWS Marquette, MI

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000
CXUS53 KMQT 040953
CLMMQT

CLIMATE REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE MARQUETTE MI
555 AM EDT SAT MAY 4 2013

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

...THE MARQUETTE MI CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1961 TO 2013

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            67   04/30        46      21       72  04/14
                        04/27
LOWEST              2   04/02        27     -25       19  04/28
                                                          04/06
AVG. MAXIMUM     40.7              47.8    -7.1     49.8
AVG. MINIMUM     24.1              28.0    -3.9     28.1
MEAN             32.4              37.9    -5.5     39.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      8               2.6     5.4        0
DAYS MIN <= 32     27              21.1     5.9       25
DAYS MIN <= 0       0               0.1    -0.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.56   1985
 MINIMUM         0.90   1998
TOTALS           4.76              3.01    1.75     2.27
DAILY AVG.       0.16              0.10    0.06     0.08
DAYS >= .01        18              12.2     5.8       11
DAYS >= .10        10               6.9     3.1        4
DAYS >= .50         3               1.7     1.3        2
DAYS >= 1.00        0               0.6    -0.6        1
GREATEST
 24 HR. TOTAL    1.02   04/11 TO 04/12

SNOWFALL (INCHES)
RECORDS
 TOTAL           55.2   2007
TOTALS           27.6              14.5    13.1      1.7
SINCE 7/1       210.2             201.8     8.4    152.8
SNOWDEPTH AVG.     31                11      20        0
DAYS >= 1.0         7               3.3     3.7        0
GREATEST
 SNOW DEPTH        39   04/15                          1  04/17
                        04/13
 24 HR TOTAL      9.5   04/11 TO 04/12

DEGREE_DAYS
HEATING TOTAL     971               815     156      772
 SINCE 7/1       8631              8702     -71     7333
COOLING TOTAL       0                 1      -1        0
 SINCE 1/1          0                 1      -1        4
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              MM
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    34/180    DATE  04/21

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                0     RAIN                       0
LIGHT RAIN                9     FREEZING RAIN              1
LT FREEZING RAIN          9     HAIL                       0
HEAVY SNOW                0     SNOW                       4
LIGHT SNOW               19     SLEET                      4
FOG                       9     FOG W/VIS <= 1/4 MILE      6
HAZE                      0

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

&&

...APRIL 2013 MONTHLY CLIMATE SUMMARY FOR UPPER MICHIGAN...
(THIS DISCUSSION DOES NOT INCLUDE CHIPPEWA AND MACKINAC COUNTIES)

...VERY CHILLY...
...FIFTH COLDEST APRIL AT THE MARQUETTE NWS...

...WELL ABOVE NORMAL PRECIPITATION AND SNOWFALL AT MOST
PLACES...
...SIXTH HIGHEST APRIL PRECIPITATION AT THE MARQUETTE NWS...
...SEVENTH HIGHEST APRIL SNOWFALL AT THE MARQUETTE NWS...

APRIL CLIMATE STATISTICS FOR THE MARQUETTE NWS IN NEGAUNEE TOWNSHIP

                                    NORMAL   DEPARTURE
AVERAGE TEMPERATURE         32.4     37.9  MINUS    5.5
AVERAGE HIGH TEMPERATURE    40.7     47.8  MINUS    7.1
AVERAGE LOW TEMPERATURE     24.1     28.0  MINUS    3.9
HEATING DEGREE DAYS          971      815   PLUS    156
COOLING DEGREE DAYS            0        1  MINUS      1
TOTAL PRECIPITATION         4.76     3.01   PLUS   1.75
TOTAL SNOWFALL              27.6     14.5   PLUS   13.1

HIGHEST TEMPERATURE:                    67 ON 4/27 AND 4/30
LOWEST TEMPERATURE:                      2 ON 4/2
GREATEST CALENDAR DAY PRECIPITATION:  0.97 ON 4/12
GREATEST 24 HOUR PRECIPITATION:       1.02 ON 4/11-4/12
GREATEST CALENDAR DAY SNOWFALL:        9.4 ON 4/12
GREATEST 24 HOUR SNOWFALL:             9.5 ON 4/11-4/12
PEAK WIND SPEED:     34 MPH FROM THE SOUTH ON 4/21
MAXIMUM SNOW DEPTH:                     39 ON 4/13 AND 4/15

DAILY RECORD LOW MAXIMUM TEMPERATURE ON 4/1...22 (OLD RECORD
                                                  23...1992)
DAILY RECORD LOW MINIMUM TEMPERATURE ON 4/2...2 (3...2008)
DAILY RECORD LOW MAXIMUM TEMPERATURE TIED ON 4/12...28
                                             (28...1992/2007)
DAILY RECORD SNOWFALL TIED ON 4/12...9.4 (9.4...1972)
DAILY RECORD SNOWFALL ON 4/14...2.3 (0.6...1974/88)
DAILY RECORD SNOWFALL ON 4/19...6.3 (3.4...1982)
DAILY RECORD LOW MINIMUM TEMPERATURE ON 4/20...10 (13...1983)
DAILY RECORD LOW MAXIMUM TEMPERATURE TIED ON 4/20...29 (29...1982)
DAILY RECORD LOW MINIMUM TEMPERATURE ON 4/24...18 (20...1972)
DAILY RECORD SNOWFALL ON 4/25...1.5 (0.3...2002)
FIFTH HIGHEST APRIL PRECIPITATION...4.76 (RECORD 6.56...1985)
SEVENTH HIGHEST APRIL SNOWFALL...27.6 (RECORD 55.2...2007)
---------------------------------------------------------------------
GREAT LAKES WATER LEVELS (FEET/METERS ABOVE MEAN SEA LEVEL)

                            LAKE SUPERIOR  LAKE MICHIGAN-HURON
4/01/13 DAILY MEAN          600.08/182.91     576.22/175.63
4/30/13 DAILY MEAN          600.30/182.97     577.04/175.88
AVG MAR 2013 DAILY MEAN     600.09/182.91     576.23/175.63
AVG APR 2012 DAILY MEAN     600.40/183.00     577.51/176.03
LONG TERM APR DAILY MEAN    601.20/183.26     578.70/176.39
MAXIMUM APR DAILY MEAN      602.60/183.68     581.50/177.23
                                (1986)           (1986)
MINIMUM APR DAILY MEAN      599.50/182.72     576.10/175.61
                                (1926)           (1964)

...GREAT LAKES WATER LEVELS ON THE REBOUND IN APRIL...

THANKS TO SOME HEAVY LATE WINTER AND EARLY SPRING PRECIPITATION IN
THE LAKE MICHIGAN/HURON DRAINAGE BASIN...THE WATER LEVEL ON THOSE
LAKES ROSE 9 TO 10 INCHES DURING APRIL 2013. BUT SINCE INCREASED
EVAPORATION DUE TO VERY WARM LAKE WATERS AND A LACK OF SIGNIFICANT
WINTER ICE HAS RESULTED IN WELL BELOW NORMAL GREAT LAKES WATER
LEVELS FOR THE PAST SEVERAL YEARS...THE WATER LEVEL ON 4/30 WAS
STILL 22 INCHES BELOW THE LONG TERM AVERAGE. HEAVY PRECIPITATION
ALSO FELL IN THE LAKE SUPERIOR DRAINAGE BASIN IN APRIL. BUT SINCE
MUCH OF THIS PRECIPITATION WAS IN THE FORM OF SNOW...RUNOFF WAS
LIMITED AND RAISED THE LAKE LEVEL ONLY 2 TO 3 INCHES. ON 4/30...
LAKE SUPERIOR AVERAGED ALMOST 11 INCHES BELOW THE LONG TERM NORMAL.

ALTHOUGH TEMPERATURES REMAINED WELL BELOW NORMAL THROUGH MOST OF
APRIL...LINGERING LAKE ICE OVER THE BAY OF GREEN BAY AND IN THE LAKE
SUPERIOR NEARSHORE WATERS SLOWLY MELTED THROUGH THE MONTH AND WAS
GONE BY THE END OF 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 (ALL LOWER CASE).
---------------------------------------------------------------------
                       APRIL CLIMATE HIGHLIGHTS

MORE TO COME LATER.

                        APRIL WEATHER SUMMARY

MORE TO COME LATER.

                            MAY FORECAST

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING AN EQUAL CHANCE
OF AN ABOVE AND BELOW NORMAL MONTHLY MEAN TEMPERATURE AND ABOVE AND
BELOW NORMAL MONTHLY PRECIPITATION OVER ALL OF UPPER MICHIGAN IN MAY
2013.

                           MAY CLIMATOLOGY

MAY BRINGS A CONTINUED MODERATION IN TEMPERATURE AS DAYLIGHT
CONTINUES TO LENGTHEN. POSSIBLE SUNSHINE INCREASES FROM 863 MINUTES
ON 5/1 TO 932 MINUTES ON 5/31. THE AVERAGE TEMPERATURE IN MAY IS 12
TO 13 DEGREES HIGHER THAN IN APRIL. ALTHOUGH AVERAGE HIGH
TEMPERATURES REACH AROUND 70 BY MEMORIAL DAY OVER INLAND AREAS...
THE RELATIVELY COLD WATERS OF THE GREAT LAKES OFTEN KEEP SHORE
COMMUNITIES UP TO 20 DEGREES COOLER IN THE AFTERNOON. MORNING
TEMPERATURES FREQUENTLY SLIP BELOW FREEZING AT THE BEGINNING OF
MAY...BUT AVERAGE LOW TEMPERATURES RISE ABOVE 40 AFTER MID MONTH.

THE INCREASE IN AVERAGE TEMPERATURE RESULTS IN A GREATER THREAT OF
SHOWERS AND THUNDERSTORMS. AVERAGE PRECIPITATION IS 10 TO 40 PERCENT
HIGHER THAN IN APRIL...WITH THE GREATEST AMOUNTS MOST LIKELY NEAR
THE WISCONSIN BORDER WHERE THE STABILIZING INFLUENCE OF THE GREAT
LAKES IS LESS.

MAY IS GENERALLY A TEMPERATE MONTH...BUT WINTER CHILL IS STILL
POSSIBLE. ALTHOUGH AVERAGE TEMPERATURES RISE SHARPLY...FROST OFTEN
OCCURS AT THE END OF MAY AS RECORD LOW TEMPERATURES REMAIN BELOW
FREEZING THE ENTIRE MONTH AT MANY LOCATIONS. NEWBERRY SAW THE
MERCURY PLUNGE ALL THE WAY TO 19 AS LATE AS 5/24...IN 1925. MAY 1997
GOES DOWN IN THE RECORD BOOKS AS ONE OF THE COLDEST EVER AT ALL
REPORTING STATIONS WITH MONTHLY TEMPERATURES AS MUCH AS SEVEN TO
EIGHT DEGREES BELOW NORMAL. IN FACT...THIS MONTH IS THE COLDEST
FIFTH MONTH EVER AT MANISTIQUE (AVERAGE TEMPERATURE 44.4)...IRON
MOUNTAIN (45.9) AND ONTONAGON (46.6) AS WELL AS IN THE TOP TEN
COLDEST AT MOST OTHER UPPER MICHIGAN LOCATIONS. EVEN MORE
RECENTLY...MAY 2002 LANDED IN THE LIST OF TOP TEN COLDEST. MONTHLY
TEMPERATURES IN MAY 2002 AVERAGED 5 TO 7 DEGREES BELOW NORMAL AT
MOST SITES. AT MUNISING...THE MERCURY AVERAGED 9 DEGREES BELOW
NORMAL (41.5) AND THE MONTH GOES DOWN IN THE RECORD BOOKS AS THE
COLDEST MAY EVER. AT STATIONS WITH A LONGER TERM RECORD...MAY 1954
STANDS OUT AS VERY CHILLY...IN FACT THE COLDEST EVER AT THE HOUGHTON
COUNTY AIRPORT (41.8)...WHEN MONTHLY TEMPERATURES FELL OVER EIGHT
DEGREES BELOW NORMAL.

SNOW CAN STILL PLAGUE UPPER MICHIGAN DURING MAY. A LATE SEASON
SNOWSTORM OCCURRED IN CENTRAL UPPER MICHIGAN ON 5/9-5/10/90...WHEN
AN IMPRESSIVE 22.4 INCHES OF HEAVY WET SNOW FELL AT THE MARQUETTE
NWS...11 INCHES BLANKETED IRON MOUNTAIN...AND 7 INCHES FELL ON
MUNISING. DURING THE CHILLY MAY 1997...13 INCHES OF THE WHITE STUFF
ACCUMULATED AT ONTONAGON ON 5/12 AND 11.3 INCHES SMOTHERED IRONWOOD.
NEWBERRY WAS STRUCK BY AN EVEN LATER MAY SNOWSTORM...10 INCHES
ACCUMULATED THERE ON 5/23 AND 5/24 BACK IN 1917. MEASURABLE SNOW AS
LATE AS MEMORIAL DAY IS NOT UNPRECEDENTED...IRONWOOD RECORDED 3.7
INCHES OF SNOW ON 5/28/65.

ALTHOUGH SNOW CAN STILL FALL IN MAY...SPRING HEAT WAVES CAN ALSO
BRING MID SUMMER HEAT TO UPPER MICHIGAN. ON 5/31 IN 1934...BOTH IRON
MOUNTAIN AND IRONWOOD RECORDED MONTHLY RECORD 100 DEGREE HIGH
TEMPERATURES. RECORD HIGH TEMPERATURES ARE IN THE 90S EVERYWHERE BY
MONTHS` END...EXCEPT AT MANISTIQUE WHERE A SOUTHERLY FLOW OFF LAKE
MICHIGAN OFTEN KEEPS AFTERNOON MAXIMUM TEMPERATURES FROM GETTING AS
HIGH AS FARTHER INLAND. MAY 1977 AND 1998 ARE THE WARMEST MAYS IN
RECENT MEMORY. MAY 1977 IS THE WARMEST ON RECORD AT IRON MOUNTAIN
(62.4)...THE MARQUETTE NWS (59.4)...THE HOUGHTON COUNTY AIRPORT
(58.1) AND MUNISING (57.5). MAY 1998 GOES DOWN IN THE RECORD BOOKS
AS THE WARMEST ON RECORD AT NEWBERRY (59.1) AND IN THE TOP FIVE
WARMEST AT MANY OTHER PLACES. MAY 2000 SAW A VERY SUMMERLIKE WEEK IN
THE EARLY PART OF THE MONTH...AND TEMPERATURES AVERAGED 20 DEGREES
ABOVE NORMAL AT MANY LOCATIONS BETWEEN 5/3 AND 5/8. BARAGA SAW THE
MERCURY REACH 90 ON 5/5/2000...AND THE MARQUETTE NWS BROKE FOUR
DAILY RECORD HIGH TEMPERATURES DURING THAT 6-DAY STRETCH. IN FACT...
THE WEEK BETWEEN 5/3/00 AND 5/8/00 IS THE WARMEST 6-DAY PERIOD ON
RECORD IN EARLY MAY AT THE MARQUETTE NWS. MORE RECENTLY...MAY 2010
FEATURED A MEAN MONTHLY AVERAGE TEMPERATURE 3 TO 5 DEGREES ABOVE
NORMAL.

                          OUTLOOK FOR SUMMER

THE CLIMATE PREDICTION CENTER (CPC) IS FORECASTING A GREATER THAN
CLIMATOLOGICAL CHANCE OF AN ABOVE NORMAL 3-MONTH AVERAGE TEMPERATURE
OVER THE SOUTHEAST HALF OF UPPER MICHIGAN IN JUNE THROUGH AUGUST
2013 BUT EQUAL CHANCES OF AN ABOVE AND BELOW NORMAL 3-MONTH MEAN
TEMPERATURE OVER THE NORTHWEST HALF. THE CPC IS FORECASTING AN EQUAL
CHANCE OF ABOVE AND BELOW NORMAL 3-MONTH PRECIPITATION OVER ALL OF
UPPER MICHIGAN IN JUNE THROUGH AUGUST.

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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