Severe Thunderstorm Watch 69

Issued

Mar 31, 2016, 2:05 PM CDT (19:05 UTC)

Expired

Mar 31, 2016, 10:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Shreveport radar (KSHV), 122 km from the middle of the area, began a volume at 19:08 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

70%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 302Mar 31, 10:26 AM CDT
• Mesoscale Discussion 306Mar 31, 1:30 PM CDT
• Mesoscale Discussion 313Mar 31, 5:22 PM CDT
• Mesoscale Discussion 318Mar 31, 9:09 PM CDT

461 
WWUS20 KWNS 311903
SEL9  
SPC WW 311903
ARZ000-LAZ000-010300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 69
NWS STORM PREDICTION CENTER NORMAN OK
205 PM CDT THU MAR 31 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  SOUTHEAST ARKANSAS
  CENTRAL AND NORTHEAST LOUISIANA

* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 205 PM UNTIL
  1000 PM CDT.

* PRIMARY THREATS INCLUDE...
  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS
    TO 2.5 INCHES IN DIAMETER POSSIBLE
  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...THUNDERSTORMS ARE BEGINNING TO DEVELOP ACROSS
LOUISIANA/SOUTHEAST ARKANSAS...AND THE TREND FOR INCREASING STORM
COVERAGE/INTENSITY IS EXPECTED THROUGH THE AFTERNOON AND EVENING. 
SUPERCELLS WITH LARGE HAIL SHOULD BE THE MAIN THREAT...THOUGH
EVENTUAL GROWTH INTO A FEW CLUSTERS IS POSSIBLE...WITH AN ATTENDANT
DAMAGING WIND RISK.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST
OF NATCHITOCHES LOUISIANA TO 60 MILES EAST NORTHEAST OF MONROE
LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 67...WW 68...

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 25035.


...THOMPSON

Severe Thunderstorm Watches in Louisiana, 2016Severe Thunderstorm Watches in Arkansas, 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.