Tornado Watch 178

Issued

Apr 9, 2008, 1:20 PM CDT (18:20 UTC)

Expired

Apr 9, 2008, 8:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Particularly dangerous situation

Yes

Largest hail expected

3 in

Strongest gust expected

70 kt

The San Angelo radar (KSJT), 76 km from the middle of the area, began a volume at 18:25 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

70%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 598Apr 9, 12:24 PM CDT
• Mesoscale Discussion 599Apr 9, 12:46 PM CDT
• Mesoscale Discussion 604Apr 9, 5:12 PM CDT
• Mesoscale Discussion 607Apr 9, 6:59 PM CDT

000
WWUS20 KWNS 091822
SEL8  
SPC WW 091822
TXZ000-100100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 178
NWS STORM PREDICTION CENTER NORMAN OK
120 PM CDT WED APR 9 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       PARTS OF WEST CENTRAL AND NORTHWEST TEXAS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 120 PM UNTIL
800 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 3 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST SOUTHWEST OF
SAN ANGELO TEXAS TO 35 MILES EAST SOUTHEAST OF MINERAL WELLS
TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 176...WW 177...

DISCUSSION...POTENT SHEAR PROFILES ARE NOW IN PLACE TO SUPPORT RAPID
SUPERCELL DEVELOPMENT VICINITY WARM FRONT THAT EXTENDS FROM NEAR MAF
ENEWD TO DFW.  MDT/STG WARM SECTOR INSTABILITY WITH LITTLE REMAINING
INHIBITION WRN PORTION OF WATCH WILL LEAD TO RAPID SEVERE
THUNDERSTORM DEVELOPMENT.  POTENTIAL FOR VERY LARGE HAIL AND
TORNADOES WITH ANY SUPERCELL.  ADDITIONALLY LATER IN AFTERNOON
CONCERN INCREASES FOR STRONG TORNADOES AS SHEAR CONTINUES TO
INCREASE. ADDITIONAL MORE ISOLATED INITIATION IS POSSIBLE DOWN THE
DRY LINE WHICH EXTENDS TO RIO GRANDE BIG BEND.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24030.


...HALES

Tornado Watches in Texas, 2008Every tornado watch in 2008

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.