Fog/Freezing Fog Advisories Posted

Freezing Line Bisects West TN

(Tuesday, December 16, 2008) – At 4 PM, using ASOS, AWOS and MESONET reports, the freezing line is analyzed from Clarksville to Humboldt to just south of Covington.  (See graphic below for rough placement of 32º isotherm).  The frontal boundary is still quite distinctive across north-central Alabama to a weak low over western AL then south to near New Orleans.  Using the NAM temperature forecast as it has handled this cold air the best and this afternoon has done fairly decent job with the temperatures, both the 12z and 18z runs generally keep the freezing line right where it is currently.  This is almost parallel to highway 70/79.  So lows should range from around 27 at Union City/Dyersburg to 29 at Paris to 34 at Jackson and 36 at Savannah.

4 pm Mesonet Reports and 32º Isotherm

Guidance is only suggesting a 20-30 percent chance of any precipitation and anything should be light and be more on the order of drizzle…keeping in mind it will be freezing drizzle north of the freezing line.

Latest Warnings/Advisories from NWS

WINTER WEATHER ADVISORY UNTIL NOON CST TODAY FOR CROCKETT-DYER-GIBSON-HENRY-LAKE-LAUDERDALE-OBION-WEAKLEY. 

 
FREEZING RAIN ADVISORY UNTIL NOON CST TODAY FOR CARROLL-CHESTER-DECATUR-FAYETTE-HARDEMAN-HARDIN-HAYWOOD-HENDERSON-MADISON-MCNAIRY-SHELBY-TIPTON.

Forecast for Jackson & Madison County

(Tuesday, December 16, 2008) – I am posting a forecast for the Jackson-Madison County area. After considering radar trends I feel the NAM model is doing a little better than GFS. It certainly is superior on temperatures. I am following 6 hourly MOS POPs after considering the radar trends and the 3-hourly MOS and raw NAM model generated numbers.

JACKSON-MADISON COUNTY FORECAST
WEST TENNESSEE WEATHER ONLINE JACKSON TN
417 AM CST TUE DEC 16 2008

 

.TODAY…CLOUDY WITH A 40 PERCENT CHANCE OF LIGHT FREEZING RAIN AND SLEET. ANY ICE ACCUMULATION ONE-TENTH OF AN INCH OR LESS. NO SLEET ACCUMULATION. HIGH 34.

.TONIGHT…CLOUDY WITH A 40 PERCENT CHANCE OF RAIN OR FREEZING RAIN. LOW 31.

.WEDNESDAY…MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF LIGHT RAIN. HIGH 41.

HOLMES

SPECIAL WEATHER STATEMENT – Update

SPECIAL WEATHER STATEMENT
WEST TENNESSEE WEATHER ONLINE JACKSON TN
1156 PM CST MON DEC 15 2008

 

…WINTER STORM WARNING UNTIL NOON TUESDAY FOR DYER, LAKE, OBION,CROCKETT, GIBSON, HENRY, LAUDERDALE, AND WEAKLEY COUNTIES…

 
…FREEZING RAIN ADVISORY UNTIL NOON TUESDAY FOR CARROLL, CHESTER,DECATUR, FAYETTE, HARDEMAN, HAYWOOD, HENDERSON, MADISON, SHELBY,TIPTION, HARDIN, AND MCNAIRY COUNTIES…

 
MAJOR FREEZING RAIN AND SLEET EVENT IS CONTINUING ACROSS NORTHERN WEST

TENNESEE.  THE AREAS UNDER A WINTER STORM WARNING WILL SEE FREEZING

RAIN AND SLEET OVERNIGHT WITH DANGEROUS CONDITIONS

EXPECTED…ESPECIALLY IN LAKE AND OBION COUNTIES. TOTAL ICE

ACCUMULATIONS IN THE WARNING AREA ARE EXPECTED TO BE ON THE ORDER OF

1/4 TO 1/2 INCH AND SLEET ACCUMULATIONS OF 1 TO 2 INCHES WILL BE

POSSIBLE. PRECIPITATION IS EXPECTED TO TAPER OFF AFTER SUNRISE AND END

BY NOON.

IN THE ADVISORY AREAS, ICE ACCUMULATIONS ARE EXPECTED TO BE ONE-TENTH

OF AN INCH OR LESS. EVEN THIS SMALL AMOUNT OF ICE CAN CAUSE MAJOR

PROBLEMS ON AREA ROADWAYS AND BRIDGES.

HOLMES/NWS