FREEZE WARNING

[Thundersnow]

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE NASHVILLE TN
804 PM CDT THU OCT 12 2006

...COLDEST TEMPERATURES OF THE SEASON FOR THE MID STATE TONIGHT...

.COLD AND DRY AIR CONTINUES TO POUR INTO THE MID STATE FROM THE
CENTRAL PLAINS. THE CLOUD COVER WILL DISSIPATE AS WINDS DIMINISH...
ALLOWING TEMPERATURES TO DROP INTO THE LOW TO MID 30S FOR MOST OF
THE AREA. THE COLDEST READINGS WILL OCCUR IN SHELTERED AREAS ALONG
AND NORTH OF INTERSTATE 40 AND OVER PARTS OF THE CUMBERLAND
PLATEAU. SOME RURAL LOCATIONS WILL FALL TO FREEZING OR EVEN A
COUPLE OF DEGREES COLDER.

TNZ005>011-022>034-056-057-059-062>066-078>080-130915-
/O.UPG.KOHX.FR.Y.0001.061013T0600Z-061013T1200Z/
/O.NEW.KOHX.FZ.W.0001.061013T0600Z-061013T1200Z/
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-WILLIAMSON-
RUTHERFORD-CANNON-DEKALB-WHITE-CUMBERLAND-WARREN-GRUNDY-VAN BUREN-
804 PM CDT THU OCT 12 2006

...FREEZE WARNING IN EFFECT FROM 1 AM TO 7 AM CDT FRIDAY...

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM 1 AM TO 7 AM CDT FRIDAY.

VERY COLD AIR WILL CONTINUE TO MOVE INTO THE AREA TONIGHT. CLEARING
SKIES AND DIMINISHING WINDS WILL ALLOW TEMPERATURES TO DROP BELOW
FREEZING IN SOME RURAL AREAS AND VALLEYS. ALSO...FROST WILL
DEVELOP OVER MUCH OF THE AREA.

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS COULD DAMAGE OR KILL SENSITIVE
VEGETATION.

[Thundersnow]

URGENT - WEATHER MESSAGE
 NATIONAL WEATHER SERVICE NASHVILLE TN
 153 PM CST THU NOV 2 2006
 
 ...COLDER AIR MOVING INTO MIDDLE TENNESSEE...
 
 .A LARGE COLD CANADIAN HIGH PRESSURE SYSTEM HAS MOVED INTO THE
 CENTRAL PLAINS... PROVIDING MIDDLE TENNESSEE WITH A DEEP
 NORTHERLY FLOW. SKIES WILL REMAIN CLEAR OVERNIGHT... AND AS
 SURFACE WINDS DIMINISH... TEMPERATURES WILL DROP SHARPLY. A
 WIDESPREAD HARD FREEZE IS THEREFORE EXPECTED TONIGHT.
 
 TNZ056>058-060-061-075-093>095-030400-
 /O.UPG.KOHX.FZ.A.0001.061103T0900Z-061103T1400Z/
 /O.NEW.KOHX.FZ.W.0006.061103T0900Z-061103T1400Z/
 PERRY-HICKMAN-LEWIS-MAURY-MARSHALL-BEDFORD-WAYNE-LAWRENCE-GILES-
 153 PM CST THU NOV 2 2006
 
 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 8 AM CST FRIDAY...
 
 THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A FREEZE
 WARNING...WHICH IS IN EFFECT FROM 3 AM TO 8 AM CST FRIDAY. A
 FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
 HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
 SENSITIVE VEGETATION.

This will make about the third time that some of these places have been under a Freeze Warning.  :roll:

I suppose the NWS feels that it has been so borderline in some of these areas so far that they are playing it safe... just in case someone doesn't realize that the garden season is really, really over now and that it's not generally a good idea to leave out any sensitive plants that you care about saving in November.

[Thundersnow]

Here is an interesting little tidbit from the News 2 blog this morning:

Hard freeze in progress this morning, the coldest morning yet this season for the basin and southern counties. Our area is divided into 5 zones divided by topography and latitude; our southern zone hadn't yet recorded 4 sites reaching 27 degrees for three hours (the NWS definition of a hard freeze).

So, the NWS does apparently have criteria it uses to determine when to no longer issue a Freeze Warning for the season for any given zone.