Record Warm Winter-Spring Lead To Near Record Warm Lake Temps

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
553 AM CDT SUN MAY 27 2012 /653 AM EDT SUN MAY 27 2012/

...RECORD WARM WINTER AND SPRING LEADING TO RECORD WARM LAKE
TEMPERATURES...

THE RUN OF UNSEASONABLY TO OCCASIONALLY RECORD WARM TEMPERATURES
ARE POISED TO THREATEN...IF NOT BREAK...MORE RECORDS. THROUGH MAY
26TH...THIS SPRING IN CHICAGO IS ON PACE TO BE THE WARMEST SPRING
ON RECORD IN CHICAGO. AS OF THE 26TH THIS SPRING WAS RUNNING ABOUT
0.7 DEGREES WARMER THAN THE CURRENT RECORD WARM SPRING IN CHICAGO
(1977). BASED ON OUR CURRENT FORECAST THROUGH THE END OF THE
MONTH...IT APPEARS LIKELY THAT THE 2012 SPRING WILL BREAK THE
RECORD FOR THE WARMEST SPRING EVER IN CHICAGO. THE WINTER/SPRING 6
MONTH PERIOD THAT WILL WRAP UP AT THE END OF THIS MONTH ALSO LOOKS
AS THOUGH IT WILL BE THE WARMEST WINTER-SPRING PERIOD ON RECORD IN
CHICAGO.

THIS PROLONGED PERIOD OF RECORD WARM TEMPERATURES ACROSS THE
REGION IS RESULTING IN RECORD AND NEAR RECORD WARM WATER
TEMPERATURES FOR SOUTHERN LAKE MICHIGAN. THE FOLLOWING TEMPERATURE
INFORMATION IS BASED ON THE WATER TEMPERATURES AS RECORDED AT THE
MID-LAKE SOUTH BUOY...WHICH IS LOCATED ABOUT 50 MILES EAST OF
MILWAUKEE WISCONSIN. WATER TEMPERATURES ALONG THE NEARSHORE ARE
OFTEN CONSIDERABLY MILDER THIS TIME OF YEAR...HOWEVER THERE IS NO
READILY AVAILABLE LONG PERIOD OF RECORD OF ARCHIVED WATER
TEMPERATURES NEAR THE SHORE.

AT THE SOUTH BUOY...WATER TEMPERATURES THIS PAST WEEK HAVE BEEN
CONSISTENTLY IN THE 50S...PEAKING AT 59.2 DEGREES LAST WEDNESDAY.
BASED ON DATA GOING BACK TO 1982...THE AVERAGE WATER TEMPERATURE
AT THE SOUTH BUOY FOR MAY 21ST THROUGH 25TH IS 41.0F...SO THE
SOUTHERN PORTIONS OF THE LAKE ARE RUNNING 10F TO ALMOST 20F ABOVE
THE 30 YEAR AVERAGES. ONLY ONCE BEFORE ON RECORD HAVE WATER
TEMPERATURES BEEN THIS WARM ANY EARLIER IN THE SEASON AND THAT WAS
BACK ON MAY 16 1991 WHEN WATER TEMPERATURES BRIEFLY REACHED 60F.

ALSO...ROCKFORD IS ON PACE TO SHATTER THEIR CURRENT RECORD FOR
WARMEST WINTER-SPRING PERIOD ON RECORD...LIKELY BY MORE THAN 2F!
THIS SPRING IS ALSO ON PACE AND VERY LIKELY WILL BREAK THE RECORD
FOR THE WARMEST ON RECORD IN ROCKFORD.

$$

IZZI



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