Saturday, June 30, 2007

Severe Thunderstorm Watch



The SPC has issued watch 465 for North Alabama until 7 p.m.

Here is the text of the mesoscale discussion from the SPC that preceded the watch.

MESOSCALE DISCUSSION 1328
NWS STORM PREDICTION CENTER NORMAN OK
1147 AM CDT SAT JUN 30 2007

AREAS AFFECTED...NORTHERN MS...CENTRAL AL...SOUTHWEST GA

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 301647Z - 301815Z

SCATTERED THUNDERSTORMS ARE EXPECTED TO INTENSIFY SOON ALONG
A BROAD AXIS FROM NORTHERN MS INTO SOUTHWEST GA. A SEVERE
THUNDERSTORM WATCH MAY BE ISSUED FOR THIS REGION.

VISIBLE SATELLITE IMAGERY SHOWS SCATTERED CU/TCU BEGINNING
TO DEVELOP IN A ZONE FROM NORTHERN MS...ACROSS AL...INTO
SOUTHWEST AL. FULL MORNING SUNSHINE HAS ALLOWED TEMPERATURES
IN THIS REGION TO RISE INTO THE 90S. DEWPOINTS IN THE LOWER
70S AND CONTINUED DIURNAL HEATING WILL YIELD MLCAPE VALUES
OVER 1500 J/KG AND STEEP LOW LEVEL LAPSE RATES. WATER VAPOR
IMAGERY SHOWS WEAK RESIDUAL FEATURES FROM YESTERDAYS
CONVECTION...BUT OVERALL LARGE SCALE FORCING IS NEGLIGIBLE.
VERTICAL SHEAR PROFILES ARE ALSO QUITE WEAK. HOWEVER...PW
VALUES OF NEARLY 2 INCHES ON 12Z JAN/BHM SOUNDINGS AND
DEGREE OF INSTABILITY INDICATE A RISK OF SLOW MOVING INTENSE
THUNDERSTORMS WITH LOCALLY DAMAGING WINDS AND HEAVY RAINFALL.

..HART.. 06/30/2007

2 comments:

Cookeville Weather Guy said...

how's the weather in 'bama?

Mike said...

We finally had some rain this weekend in many areas. I recorded .14" Sat and .26" Sunday.