April 2009 Recap

...APRIL...A MONTH OF VARIABILITY...

IN TYPICAL NORTHERN MICHIGAN FASHION...APRIL BROUGHT ABOUT THE FULL
GAMUT OF WEATHER...WITH EARLY MONTH WINTER-LIKE CONDITIONS GIVING
WAY TO TEMPERATURES MORE TYPICAL OF SPRING...WITH EVEN A FEW
SUMMER-LIKE READING BY THE END OF THE MONTH. OVERALL...THE GENERAL
THEME FOR THE MONTH WAS SLIGHTLY WARMER THAN NORMAL
TEMPERATURES...WITH JUST A FEW EXCEPTIONS.

THE BIGGER STORY WAS THE EXCEEDINGLY DRY CONDITIONS TO BEGIN THE
MONTH...WHICH EXACERBATED THE TYPICAL SPRING FIRE WEATHER CONCERNS.
FORTUNATELY...NO SIGNIFICANT WILD FIRES WERE REPORTED DURING THE
MONTH. TOWARDS THE END OF THE MONTH...CONDITIONS TURNED DECIDEDLY
WETTER...WHICH ACTUALLY PUSHED A COUPLE LOCATIONS TO ABOVE NORMAL
PRECIPITATION. STILL...OVERALL...IT WAS A DRY MONTH...WITH MOST
LOCATIONS EXPERIENCING BELOW NORMAL PRECIPITATION. IN ADDITION...THE
THEME OF BELOW NORMAL SNOWFALL THAT DEVELOPED LATE IN THE WINTER
KEPT ON UNABATED...WITH ALL LOCATIONS COMING IN SEVERAL INCHES BELOW
NORMAL.

HERE IS A LOOK AT HOW SOME LOCATIONS FARED WITH RESPECT TO THEIR
AVERAGE TEMPERATURES DURING APRIL 2009 (MAX...MIN...AND MEAN
VALUES REPRESENT AVERAGE VALUES DURING THE MONTH. NORMAL VALUES USED
TO CALCULATE DEPARTURES ARE FROM THE 30 YEAR PERIOD OF 1971-2000):

                                               SSM       HTL       APN       TVC       GLR*      ALL

APR MAX 2009                    48.1       53.6       51.3       52.9       50.6       51.3
MAX DEPARTURE              +0.1       +0.6       +1.0        -0.3        -2.8        -0.3

APR MEAN 2009                 40.1       42.8       41.2       42.8       40.8       41.5
MEAN DEPARTURE           +1.7       +1.0       +0.9       +0.1        -0.7       +0.6

APR MIN 2009                     32.2        32.0       31.0       32.6      31.1        31.8
MIN DEPARTURE               +3.4        +1.4       +0.8       +0.5      +1.6        +1.5

*UNOFFICIAL DATA (OBSERVED TEMPERATURE DATA IS FROM AUTOMATED
SURFACE OBSERVING SYSTEM (ASOS) AND NORMAL DATA IS COMPILED FROM
COOPERATIVE OBSERVER SITES IN VICINITY OF ASOS SITES)
___________________________________________________________________

HERE IS A LOOK AT HOW SOME LOCATIONS FARED WITH RESPECT TO LIQUID
PRECIPITATION (RAIN AND MELTED FROZEN PRECIPITATION) DURING APRIL
2009 (NORMAL VALUES USED TO CALCULATE DEPARTURES ARE FROM THE 30
YEAR PERIOD OF 1971-2000):

                                                                  SSM       HTL       APN      TVC*      GLR**

TOTAL PRECIPITATION (IN)               1.31       4.25       2.95      2.12        2.43
DEPARTURE FROM NORMAL          -1.26     +1.96     +0.64    -0.60       -0.03

*UNOFFICIAL DATA (OBSERVED PRECIPITATION IS FROM THE COOPERATIVE
OBSERVER SITE IN THE VICINITY OF THE ASOS SITE AND NORMAL
PRECIPITATION DATA IS COMPILED FROM THE ASOS SITE)

**UNOFFICIAL DATA (OBSERVED AND NORMAL PRECIPITATION IS FROM THE
COOPERATIVE OBSERVER IN THE VICINITY OF THE ASOS SITE)

-WITH 4.25 INCHES OF PRECIPITATION RECORDED AT HOUGHTON LAKE DURING
APRIL...THIS WAS THE 10TH WETTEST APRIL ON RECORD SINCE 1913.
___________________________________________________________________

HERE IS A LOOK AT HOW SOME LOCATIONS FARED WITH RESPECT TO SNOWFALL
DURING APRIL 2009 (NORMAL VALUES USED TO CALCULATE DEPARTURES ARE
FROM THE 30 YEAR PERIOD OF 1971-2000):

                                                            SSM       HTL       APN      TVC*     GLR**

TOTAL SNOWFALL (IN)                    1.3         0.2         0.1        1.2         3.2
DEPARTURE FROM NORMAL       -6.3       -4.1        -4.2       -1.6       -3.7

*UNOFFICIAL DATA (OBSERVED SNOWFALL IS FROM THE COOPERATIVE OBSERVER
SITE IN THE VICINITY OF THE ASOS SITE AND NORMAL SNOWFALL DATA IS
COMPILED FROM THE ASOS SITE)

**UNOFFICIAL DATA (OBSERVED AND NORMAL SNOWFALL DATA IS COMPILED
FROM THE COOPERATIVE OBSERVER SITE IN THE VICINITY OF THE ASOS SITE)
___________________________________________________________________

HERE ARE SOME OF THE MORE NOTABLE WEATHER EVENTS DURING APRIL
2009:

-ON APRIL 3RD...A LATE WINTER STORM BROUGHT A COUPLE INCHES OF HEAVY
WET SNOW TO NORTHERN MICHIGAN...ESPECIALLY ACROSS THE INTERIOR
HIGHLANDS. THE HIGHEST AMOUNT...3.6 INCHES...WAS RECORDED RIGHT HERE
AT THE OFFICE.

-ON APRIL 7TH...COLD AIR CROSSING THE INCREASINGLY ICE FREE GREAT
LAKES BROUGHT A ROUND OF LATE SEASON LAKE EFFECT SNOW TO PARTS OF
NORTHWEST LOWER MICHIGAN. THE SNOWFALL WAS CONCENTRATED JUST SOUTH
AND EAST OF TRAVERSE CITY...WHERE 1 TO 3 INCH TOTALS WERE FOUND.

-EASTER SUNDAY (APRIL 12TH)...A NEAR PERFECT EASTER ACROSS NORTHERN
MICHIGAN WITH ABUNDANT SUNSHINE AND TEMPERATURES WARMING WELL INTO
THE 40S AND LOWER 50S.

-APRIL 24TH...WARMEST AIR OF THE SPRING SEASON OVERSPREAD THE
NORTHERN LAKES ON SOUTHERLY WINDS. MOST AREAS REACHED WELL INTO THE
MID TO UPPER 70S...WITH EVEN THE FIRST 80 DEGREE READING OF THE
SEASON REPORTED AT TRAVERSE CITY...WHICH MADE IT ALL THE WAY TO 82
DEGREES.

-EARLY ON APRIL 25TH...AFTER THE WARM AIR OF THE 24TH...THE SEASONS
FIRST THUNDERSTORMS WERE OBSERVED ACROSS EASTERN UPPER AND NORTHWEST
LOWER MICHIGAN. SOME OF THE STORMS PRODUCED LOCALLY HEAVY RAIN...
WITH RADAR ESTIMATES SHOWING UP TO A HALF AN INCH OF MUCH NEEDED
RAINFALL IN SOME LOCATIONS.

-APRIL 25TH THRU THE 27TH...AFTER A EXCEEDINGLY DRY PERIOD TO START
THE MONTH (UNFORTUNATELY...IN A PERIOD KNOWN AS THE NORTHERN
MICHIGAN FIRE WEATHER SEASON)...MUCH NEEDED RAINFALL WAS OBSERVED
THROUGHOUT THIS PERIOD. THREE DAY RAINFALL TOTALS RANGED FROM A HALF
AN INCH TO NEARLY AN INCH AND THREE QUARTERS. THE GREATEST AMOUNT
WAS OBSERVED AT HOUGHTON LAKE...WHICH CAME IN WITH 1.78 INCHES FOR
THE PERIOD.
___________________________________________________________________

HERE ARE DAILY TEMPERATURE...PRECIPITATION...AND SNOWFALL RECORDS
THAT OCCURRED DURING APRIL 2009:

-A RECORD RAINFALL OF 0.94 INCHES WAS SET AT ALPENA ON APRIL 3RD.
THIS BROKE THE OLD RECORD OF 0.85 INCHES SET IN 2006.

-A RECORD RAINFALL OF 0.90 INCHES WAS SET AT ALPENA ON APRIL 20TH.
THIS BROKE THE OLD RECORD OF 0.85 INCHES SET IN 1970.

                     **********************

FOR ADDITIONAL CLIMATE INFORMATION INCLUDING UP TO DATE LOCAL
CLIMATE GRAPHICS...SEASONAL OUTLOOKS...AND EL NINO INFORMATION...
PLEASE VISIT THE FOLLOWING WEBSITES:

GAYLORD NATIONAL WEATHER SERVICE
  WWW.CRH.NOAA.GOV/APX/CLIMATE.PHP

CLIMATE PREDICTION CENTER
  HTTP://WWW.CPC.NOAA.GOV/PRODUCTS/PREDICTIONS/

EL NINO AND LA NINA INFORMATION
  HTTP://WWW.CPC.NOAA.GOV/PRODUCTS/ANALYSIS_MONITORING/ENSO_ADVISORY/

FOR MORE INFORMATION...CONTACT THE GAYLORD NATIONAL WEATHER SERVICE
AT (989) 731-3384...EXTENSION 726 OR 766.

$$

MSB



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