721
NOUS42 KCHS 270838
PNSCHS
GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>051-280000-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
338 AM EST FRI NOV 27 2009
...A REVIEW OF THE NATIONAL WEATHER SERVICE FROST/FREEZE
PROGRAM...
FORECASTERS AT THE NATIONAL WEATHER SERVICE IN CHARLESTON ARE
RESPONSIBLE FOR THE TIMELY ISSUANCE OF WATCHES...WARNINGS AND
ADVISORIES FOR FROST AND FREEZE CONDITIONS FOR ALL OF SOUTHEAST
SOUTH CAROLINA AND MUCH OF SOUTHEAST GEORGIA.
THE FOLLOWING CRITERIA ARE USED TO DETERMINE WHEN THESE PRODUCTS
ARE ISSUED...
..FREEZE WATCH
A FREEZE WATCH IS ISSUED WHEN THERE IS A 50 PERCENT OR GREATER
PROBABILITY THAT LOW TEMPERATURES WILL DROP TO 32 DEGREES OR
LOWER FOR ANY DURATION...USUALLY WITHIN 12 TO 48 HOURS.
..FREEZE WARNING
A FREEZE WARNING IS ISSUED WHEN THERE IS AN 80 PERCENT OR GREATER
PROBABILITY THAT LOW TEMPERATURES WILL DROP TO 32 DEGREES OR
LOWER FOR ANY DURATION...USUALLY WITHIN 12 TO 24 HOURS.
..FROST ADVISORY
A FROST ADVISORY IS ISSUED WHEN THERE IS AN 80 PERCENT OR GREATER
PROBABILITY THAT CONDITIONS WILL SUPPORT THE DEVELOPMENT OF
SCATTERED OR WIDESPREAD FROST. PATCHY FROST DOES NOT NECESSITATE
THE ISSUANCE OF A FROST ADVISORY.
THE NATIONAL WEATHER SERVICE WILL DECLARE AN END TO THE GROWING
SEASON FOR A PARTICULAR FORECAST ZONE WHEN AT LEAST 1/2 OF THAT
ZONE EXPERIENCES FREEZING TEMPERATURES OF 3 HOURS OR MORE. ONCE
THE END OF THE GROWING SEASON IS DECLARED...FREEZE WATCHES...
FREEZE WARNINGS AND FROST ADVISORIES WILL NO LONGER BE ISSUED
UNTIL THE FOLLOWING SPRING...USUALLY AROUND MARCH 15TH.
A COLORED MAP SHOWING THE AVERAGE FIRST FREEZE DATES FOR
SOUTHEAST SOUTH CAROLINA AND SOUTHEAST GEORGIA CAN BE FOUND
ONLINE AT...
WWW.WEATHER.GOV/CHS/IMAGES/FIRSTFREEZE.PNG
/ALL LOWER CASE LETTERS/
BELOW ARE SOME AVERAGE FIRST FREEZE DATES FOR A FEW COMMUNITIES
ACROSS SOUTHEAST SOUTH CAROLINA AND SOUTHEAST GEORGIA...
..SOUTHEAST SOUTH CAROLINA
ALLENDALE.................. NOVEMBER 7
WALTERBORO................. NOVEMBER 7
YEMASSEE................... NOVEMBER 10
SUMMERVILLE................ NOVEMBER 11
HAMPTON.................... NOVEMBER 12
RIDGELAND.................. NOVEMBER 13
PINOPOLIS DAM.............. NOVEMBER 15
NORTH CHARLESTON /KCHS/.... NOVEMBER 27
BEAUFORT................... DECEMBER 1
DOWNTOWN CHARLESTON........ DECEMBER 18
..SOUTHEAST GEORGIA
MILLEN..................... NOVEMBER 4
NEWINGTON.................. NOVEMBER 7
SYLVANIA................... NOVEMBER 11
CLAXTON.................... NOVEMBER 13
BROOKLET................... NOVEMBER 19
FORT STEWART............... NOVEMBER 22
GLENNVILLE................. NOVEMBER 22
SAVANNAH /KSAV/............ DECEMBER 2
SAPELO ISLAND.............. DECEMBER 7
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