A Severe Thunderstorm Watch has been issued for the entire DFW area including Frisco. There is a very high possibility of severe winds with these storms, the hail threat is low and tornado threat is very low. These storms are approximately 100 miles WNW of Frisco, moving our direction about 30mph. Currently looks like these storms are expected to maintain their severity through the night as they approach the area. I place the ETA for these storms to be at or around 5am, give or take 30 minutes.
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 638
NWS STORM PREDICTION CENTER NORMAN OK
1255 AM CDT THU JUL 30 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WEST CENTRAL TO NORTH CENTRAL TEXAS
EFFECTIVE THIS THURSDAY MORNING FROM 1255 AM UNTIL 800 AM CDT.
HAIL TO 1 INCH IN DIAMETER…THUNDERSTORM WIND GUSTS TO 80
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 90 MILES WEST OF
ABILENE TEXAS TO 55 MILES EAST NORTHEAST OF DALLAS TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).
REMEMBER…A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION…CONTINUE…WW 636…WW 637…
DISCUSSION…TWO STRONG/SVR FORWARD-PROPAGATING MCSS…ONE NEARING
KSPS AND THE OTHER E OF KLBB EXPECTED TO CONTINUE ESE AND
SE…RESPECTIVELY… THROUGH THE NEXT FEW HOURS. AREA VWPS SHOW 30+
KT SE AND SLY MOIST LLJS AVAILABLE TO FEED BOTH SYSTEMS…AND DEEP
NNWLY SHEAR APPEARS STRONG ENOUGH AND FAVORABLY ORIENTED TO SUPPORT
MAINTENANCE OF THE SYSTEMS. BOTH DMGG WET MICROBURSTS AND
MARGINALLY SVR HAIL MAY OCCUR.
AVIATION…A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION