August 2009 Recap

                     ...COOL AND DAMP AUGUST...

KEEPING WITH THE THEME SET FORTH DURING THE START OF SUMMER...AUGUST
ONCE AGAIN CAME IN A TOUCH ON THE COOL SIDE. HOWEVER...MORE
PERSISTENT "WARM" SPELLS DURING THE MONTH ALLOWED AVERAGE
TEMPERATURES AT ALL LOCATIONS TO ACTUALLY AVERAGE WARMER THAN DURING
THE RECORD COOL MONTH OF JULY. SCANNING BACK THROUGH THE RECORDS...
ALTHOUGH NOT A RARE EVENT...IT IS SOMEWHAT ATYPICAL...ESPECIALLY
WHEN CONSIDERING THAT JULYS AVERAGE TEMPERATURE IS NORMALLY ABOUT 2
DEGREES WARMER THAN AUGUSTS. STILL...DESPITE THE WARMER CONDITIONS
...MOST LOCATIONS CAME IN SLIGHTLY BELOW NORMAL FOR AVERAGE
TEMPERATURES...BUT NOWHERE NEAR THE RECORD COOL CONDITIONS SET
DURING JULY. WHEN COMBINING THE PERSISTENT BELOW NORMAL TEMPERATURES
DURING JUNE AND JULY...THIS SUMMER (JUNE THROUGH AUGUST IS
CONSIDERED METEOROLOGICAL SUMMER) EASILY WAS ONE OF THE COOLEST ON
RECORD FOR ALL SITES LISTED BELOW. MORE DETAIL WILL FOLLOW ON THIS
WITH THE SOON TO BE ISSUED SUMMER SUMMARY.

THE COMBINATION OF THE WARMER TEMPERATURES AND MORE AVAILABLE
MOISTURE FROM OUR TYPICAL SUMMER MOISTURE SOURCE...THE GULF OF
MEXICO...ALLOWED RAINFALL AMOUNTS TO EXCEED NORMAL FOR MOST
LOCATIONS...ESPECIALLY ACROSS THE NORTHERN HALF OF THE AREA. THIS
WAS PROBABLY A WELCOME REPRIEVE AS MOST OF THE SUMMER HAD BEEN
RELATIVELY DRY FOR THESE LOCATIONS.
                      
HERE IS A LOOK AT HOW SOME LOCATIONS FARED WITH RESPECT TO THEIR
AVERAGE TEMPERATURES DURING AUGUST 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

AUG MAX 2009    71.6    74.3    75.0    74.6    72.6    73.6
MAX DEPARTURE   -2.5    -2.8    -1.1    -4.0    -4.7    -3.0

AUG MEAN 2009   62.9    63.3    64.6    65.5    62.8    63.8
MEAN DEPARTURE  -0.4    -1.3    +0.1    -2.3    -2.8    -1.3

AUG MIN 2009    54.2    52.3    54.1    56.5    52.9    54.0
MIN DEPARTURE   +1.8    +0.1    +1.2    -0.5    -1.0    +0.3

*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 HAIL) DURING AUGUST 2009 (NORMAL
VALUES USED TO CALCULATE DEPARTURES ARE FROM THE 30 YEAR PERIOD OF
1971-2000):

                           SSM     HTL     APN    TVC*    GLR**

TOTAL PRECIPITATION (IN)  3.69    3.35    6.08   5.67     6.07
DEPARTURE FROM NORMAL    +0.22   -0.37   +2.58  +2.28    +2.24

*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 6.08 INCHES OF RAIN AT ALPENA DURING AUGUST...THIS WAS THE
SECOND WETTEST AUGUST SINCE RELIABLE RECORDS BEGAN IN 1917. THE
RECORD STILL IS 6.26 INCHES SET BACK IN 1994. 
___________________________________________________________________

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

-AUGUST 1ST THROUGH THE 8TH...THE MONTH BEGAN MUCH LIKE JULY
ENDED...WITH PERSISTENT COOL NORTHWEST FLOW CONTINUING THE BELOW
NORMAL TEMPERATURE THEME. HIGHS THROUGH THIS PERIOD GENERALLY
REMAINED IN THE 60S AND 70S...WITH OVERNIGHT LOWS DROPPING BACK INTO
THE 40S AND 50S. BY THE 8TH...AVERAGE AUGUST READINGS WERE ALREADY
SEVERAL DEGREES BELOW NORMAL.

-AUGUST 9TH THROUGH THE 17TH...PROBABLY WHAT MOST NORTHERN
MICHIGANDERS HAD BEEN WAITING FOR ALL SUMMER LONG AS A TEMPORARY
BREAK IN THE PATTERN BROUGHT SUSTAINED WARMTH THROUGH THIS PERIOD.
DAILY HIGH TEMPERATURES OFTEN PUSHED THE MID TO UPPER 80S...AND WITH
INCREASED HUMIDITY...OVERNIGHT LOWS SEVERAL NIGHTS STRUGGLED TO FALL
OUT OF THE 60S. THIS WARM SPELL HELPED OFFSET THE COOL BEGINNING TO
THE MONTH...WITH OVERALL AUGUST TEMPERATURE AVERAGES APPROACHING
NEAR NORMAL BY THE END OF THIS PERIOD. MORE GOOD NEWS...AFTER A
RELATIVELY DRY SUMMER...SHOWERS AND STORMS BECAME MUCH MORE NUMEROUS
(A BY-PRODUCT OF THE HEAT AND HUMIDITY). SOME LOCALLY HEAVY RAIN WAS
REPORTED AT TIMES. THE HEAVIEST RAIN OCCURRED DURING THE NIGHT OF
AUGUST 15TH...WHEN A SLOW MOVING DISTURBANCE BROUGHT WIDESPREAD
THUNDERSTORMS TO THE TIP OF THE MITT. SOME OF THE HEAVIER TOTALS
THAT NIGHT INCLUDED 2.50 INCHES AT PELLSTON...AND 2.60 INCHES NEAR
INDIAN RIVER. HOWEVER...DOPPLER PRECIPITATION ESTIMATES SHOWED
AMOUNTS IN EXCESS OF 6 INCHES OVER PARTS OF EMMET AND CHEBOYGAN
COUNTIES. MORE THUNDERSTORM ACTIVITY ON THE 16TH BROUGHT LOCALIZED
HEAVY RAIN AND EVEN A FEW SEVERE WIND GUSTS...WITH TREES REPORTED
DOWN JUST NORTH OF GAYLORD AND NEAR CADILLAC (A BOAT WAS ALSO
REPORTED FLIPPED OVER ON LAKE CADILLAC).

-AUGUST 21ST THROUGH THE 23RD...BACK TO MORE TYPICAL CONDITIONS SEEN
AROUND THESE PARTS THIS SUMMER AS UNSEASONABLY STRONG LOW PRESSURE
BROUGHT A RENEWED SURGE OF COOL CANADIAN AIR TO THE NORTHWOODS. ONCE
AGAIN...HIGHS STRUGGLED TO GET MUCH OUT OF THE LOW TO MID 60S...WITH
EVEN A FEW UPPER 50 HIGHS REPORTED OVER INTERIOR ELEVATED REGIONS OF
NORTHERN LOWER MICHIGAN ON THE 22ND. TO ADD INSULT TO INJURY...OUR
OLD NEMESIS LAKE EFFECT RETURNED AS COOL AIR CROSSING THE RELATIVELY
(AND I DO MEAN "RELATIVELY") WARM WATERS OF NORTHERN LAKE MICHIGAN
BROUGHT WELL DEFINED LAKE EFFECT RAIN BANDS TO PARTS OF NORTHWEST
LOWER MICHIGAN. ALTHOUGH NOT UNPRECEDENTED...LAKE EFFECT RAIN SHOWERS
ARE UNUSUAL DURING AUGUST...WHICH IS STILL CONSIDERED PART OF THE
STABLE SEASON OVER THE GREAT LAKES.

-AUGUST 28TH THROUGH THE 31ST...ANOTHER UNSEASONABLY STRONG LOW
PRESSURE SYSTEM SLOWLY CROSSING THE NORTHERN LAKES BROUGHT
WIDESPREAD MODERATE TO HEAVY RAINFALL AND ANOTHER ROUND OF COOL
CONDITIONS TO THE AREA. THE HEAVY RAIN FELL DURING THE EVENING OF
THE 28TH...THROUGH MUCH OF THE 29TH...ESPECIALLY ACROSS THE NORTH
HALF OF THE AREA. BY THE END OF THE 29TH...MANY LOCATIONS ALONG AND
NORTH OF THE M-72 CORRIDOR RECEIVED WELL OVER AN INCH OF RAIN...WITH
SOME SITES APPROACHING 2 INCHES. THIS PUSHED SEVERAL LOCATIONS ABOVE
NORMAL RAINFALL FOR THE MONTH OF AUGUST...A WELCOME REPRIEVE TO THE
RELATIVELY DRY START TO SUMMER. ONCE THE STORM BEGAN TO PUSH OFF TO
THE EAST...COOL NORTHWEST WINDS ONCE AGAIN VISITED THE NORTHWOODS...
FORCING HIGHS TO STAY IN THE THE 50S FOR SEVERAL LOCATIONS BOTH ON
THE 29TH AND 30TH. AS SKIES CLEARED DURING THE EVENING OF THE 30TH
INTO THE MORNING OF THE 31ST...TEMPERATURE PLUMMETED...ESPECIALLY
INLAND FROM THE IMMEDIATE GREAT LAKES SHORELINES. SEVERAL LOCATIONS
DROPPED WELL INTO THE FROST-PRODUCING 30S...WITH EVEN A FEW
UNOFFICIAL UPPER 20 DEGREE READINGS REPORTED.
___________________________________________________________________

HERE ARE DAILY TEMPERATURE AND PRECIPITATION RECORDS THAT OCCURRED
DURING AUGUST 2009:

-A RECORD RAINFALL OF 0.81 INCHES WAS SET AT THE ROSCOMMON COUNTY
AIRPORT IN HOUGHTON LAKE ON AUGUST 1ST. THIS BROKE THE OLD RECORD OF
0.58 INCHES SET IN 1973.

-A RECORD LOW MAXIMUM TEMPERATURE OF 64 DEGREES WAS SET AT THE
ROSCOMMON COUNTY AIRPORT IN HOUGHTON LAKE ON AUGUST 22ND. THIS BROKE
THE RECORD OF 65 DEGREES SET IN 1975.

-A RECORD RAINFALL OF 1.31 INCHES WAS SET AT ALPENA ON AUGUST 9TH.
THIS BROKE THE OLD RECORD OF 1.06 INCHES SET IN 1943.

-A RECORD RAINFALL OF 1.71 INCHES WAS SET AT ALPENA ON AUGUST 29TH.
THIS BROKE THE OLD RECORD OF 0.94 INCHES SET IN 1975.

-A RECORD LOW MAXIMUM TEMPERATURE OF 61 DEGREES WAS TIED AT THE
GAYLORD REGIONAL AIRPORT IN GAYLORD ON AUGUST 22ND. THIS RECORD WAS
ORIGINALLY SET IN 1923.

-A RECORD RAINFALL OF 1.01 INCHES WAS TIED AT THE GAYLORD REGIONAL
AIRPORT IN GAYLORD ON AUGUST 28TH. THIS RECORD WAS ORIGINALLY SET
BACK IN 1961.

-A RECORD LOW TEMPERATURE OF 34 DEGREES WAS TIED AT THE GAYLORD
REGIONAL AIRPORT IN GAYLORD ON AUGUST 31ST. THIS RECORD WAS
ORIGINALLY SET IN 1978.

-A RECORD LOW MAXIMUM TEMPERATURE OF 62 DEGREES WAS TIED AT THE
CHERRY CAPITAL AIRPORT IN TRAVERSE CITY ON AUGUST 22ND. THIS RECORD
WAS ORIGINALLY SET IN 1926.                                     
                      
                       **********************

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.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=APX

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

EL NINO AND LA NINA INFORMATION
  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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