Severe Thunderstorm Watch 87

Issued

Apr 12, 2016, 7:45 PM CDT (00:45 UTC)

Expired

Apr 13, 2016, 1:00 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Laughlin AFB radar (KDFX), 111 km from the middle of the area, began a volume at 00:46 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

10%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

50%

• Mesoscale Discussion 372Apr 12, 3:54 PM CDT
• Mesoscale Discussion 374Apr 12, 7:26 PM CDT
• Mesoscale Discussion 375Apr 12, 9:43 PM CDT
• Mesoscale Discussion 376Apr 12, 11:06 PM CDT

547 
WWUS20 KWNS 130042
SEL7  
SPC WW 130042
TXZ000-130600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 87
NWS STORM PREDICTION CENTER NORMAN OK
745 PM CDT TUE APR 12 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  SOUTH CENTRAL TEXAS

* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 745 PM
  UNTIL 100 AM CDT.

* PRIMARY THREATS INCLUDE...
  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

SUMMARY...THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER THE SOUTHERN
EDWARDS PLATEAU AND MIDDLE RIO GRANDE VALLEY...WITH STORMS SPREADING
EASTWARD OVERNIGHT THROUGH SOUTH CENTRAL TEXAS.  THE STORM
ENVIRONMENT WILL BE SUPPORTIVE OF OCCASIONAL LARGE HAIL THE NEXT FEW
HOURS WITH EMBEDDED SUPERCELLS...AND EVENTUALLY TRANSITION TO MORE
OF AN ISOLATED DAMAGING WIND RISK AS STORMS GROW INTO CLUSTERS AND
LINE SEGMENTS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 90 MILES WEST OF
HONDO TEXAS TO 70 MILES NORTHEAST OF BEEVILLE TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 27030.


...THOMPSON

Severe Thunderstorm Watches in Texas, 2016Every severe thunderstorm watch in 2016

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.