October Cold Snap Finally Over

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
812 PM CDT SAT OCT 17 2009

...OCTOBER COLD SNAP FINALLY OVER...

IT LOOKS LIKE THE COLD SNAP SINCE THE NIGHT OF OCTOBER 9TH IS
FINALLY OVER. THIS AFTERNOON...THE 17TH OF OCTOBER...WAS THE FIRST
DAY THAT WARMED INTO THE UPPER 40S AND LOWER 50S NEAR AND EAST OF
INTERSTATE 29 SINCE SIMILAR READINGS ON THE 9TH. THAT MEANS THAT THE
AREA EXPERIENCED 9 DAYS OF BELOW NORMAL TEMPERATURES. FURTHER EAST
THIS AFTERNOON...IT WAS A LITTLE COOLER...BUT AT LEAST IT MADE IT
INTO THE LOW AND MID 40S. TOMORROW...SUNDAY...PROMISES TO BE
WARMER...BUT BREEZY...WITH HIGH TEMPERATURES MAINLY IN THE 60S. THIS
CHILLY 9 DAY PERIOD WAS ALSO ABNORMALLY WET AT MANY...BUT NOT ALL...
LOCATIONS. IN ADDITION...THERE WAS BETWEEN A HALF AND 4 INCHES OF
UNSEASONALLY EARLY SNOWFALL. THE FOLLOWING 4 PARAGRAPHS HIGHLIGHT
SOME OF THE CLIMATOLOGICAL DATA AT SIOUX FALLS SOUTH DAKOTA...HURON
SOUTH DAKOTA...MITCHELL SOUTH DAKOTA...AND SIOUX CITY IOWA.

DURING THE 9 DAY PERIOD FROM OCTOBER 9TH THROUGH 17TH...THE AVERAGE
TEMPERATURE IN SIOUX FALLS WAS 36.0 DEGREES. THIS WAS 19.9 BELOW THE
NORMAL AVERAGE OF 55.9. THE WARMEST AFTERNOON WAS THE 9TH...WITH A
HIGH OF 50 DEGREES. THE COLDEST READING WAS 21...ON THE 11TH. THE
AVERAGE HIGH TEMPERATURE WAS 42.1 DEGREES...WHICH WAS 21.1 BELOW THE
NORMAL MAXIMUM OF 63.2. THE AVERAGE LOW TEMPERATURE WAS 29.9
DEGREES...WHICH WAS 6.3 BELOW THE NORMAL MINIMUM OF 36.2. THERE WAS
0.85 INCH OF PRECIPITATION...WHICH IS 0.30 ABOVE THE NORMAL OF 0.55
INCH. THERE WAS ALSO 3.5 INCHES OF RECORD BREAKING SNOWFALL.

FOR HURON SOUTH DAKOTA...THE AVERAGE TEMPERATURE WAS 35.0 DEGREES.
THIS WAS 19.9 BELOW THE NORMAL AVERAGE OF 55.9. THE TWO WARMEST
AFTERNOONS WERE THE 9TH AND THE 17...BOTH WITH HIGHS OF 50 DEGREES.
THE COLDEST READING WAS 19...ON THE 11TH. THE AVERAGE HIGH
TEMPERATURE WAS 41.2 DEGREES...WHICH WAS 21.8 BELOW THE NORMAL
MAXIMUM OF 63.0. THE AVERAGE LOW TEMPERATURE WAS 28.8 DEGREES...
WHICH WAS 7.5 BELOW THE NORMAL MINIMUM OF 36.3. THERE WAS 0.63 INCH
OF PRECIPITATION...WHICH IS 0.17 ABOVE THE NORMAL OF 0.46 INCH.
THERE WAS ALSO 2.6 INCHES OF RECORD BREAKING SNOWFALL.

FOR MITCHELL SOUTH DAKOTA...THE AVERAGE TEMPERATURE WAS 36.6
DEGREES. THIS WAS 13.9 BELOW THE NORMAL AVERAGE OF 55.5. THE
WARMEST AFTERNOON WAS THE 9TH...WITH A HIGH OF 52 DEGREES. THE
COLDEST READING WAS 22...ON THE 11TH. THE AVERAGE HIGH TEMPERATURE
WAS 43.0 DEGREES...WHICH WAS 21.1 BELOW THE NORMAL MAXIMUM OF 64.1.
THE AVERAGE LOW TEMPERATURE WAS 30.2 DEGREES...WHICH WAS 6.7 BELOW
THE NORMAL MINIMUM OF 36.9. THERE WAS 0.21 INCH OF PRECIPITATION...
WHICH IS 0.24 BELOW THE NORMAL OF 0.45 INCH. THERE WAS ALSO 0.9
INCH OF RECORD BREAKING SNOWFALL.

FOR SIOUX CITY IOWA...THE AVERAGE TEMPERATURE WAS 38.8 DEGREES. THIS
WAS 13.8 BELOW THE NORMAL AVERAGE OF 52.6. THE WARMEST AFTERNOON WAS
THE 9TH...WITH A HIGH OF 53 DEGREES. THE COLDEST READING WAS 22...ON
THE 11TH. THE AVERAGE HIGH TEMPERATURE WAS 45.3 DEGREES...WHICH WAS
20.5 BELOW THE NORMAL MAXIMUM OF 65.8. THE AVERAGE LOW TEMPERATURE
WAS 32.3 DEGREES...WHICH WAS 7.0 BELOW THE NORMAL MINIMUM OF 39.3.
THERE WAS 0.44 INCH OF PRECIPITATION...WHICH IS 0.15 BELOW THE
NORMAL OF 0.59 INCH. THERE WAS ALSO 1.8 INCHES OF RECORD BREAKING
SNOWFALL.

$$

TRM



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