Tornado Watch 571

Issued

Dec 27, 2015, 8:56 AM CST (14:56 UTC)

Expired

Dec 27, 2015, 7:00 PM CST

In force

10 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Shreveport radar (KSHV), 195 km from the middle of the area, began a volume at 14:56 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 2079Dec 27, 5:44 AM CST
• Mesoscale Discussion 2084Dec 27, 12:45 PM CST
• Mesoscale Discussion 2086Dec 27, 2:27 PM CST
• Mesoscale Discussion 2088Dec 27, 3:19 PM CST
• Mesoscale Discussion 2090Dec 27, 4:55 PM CST

824 
WWUS20 KWNS 271452
SEL1  
SPC WW 271452
ARZ000-LAZ000-TXZ000-272200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 571
NWS STORM PREDICTION CENTER NORMAN OK
850 AM CST SUN DEC 27 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  EXTREME SOUTHWEST ARKANSAS
  NORTHWEST LOUISIANA
  EAST TEXAS

* EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 850 AM UNTIL
  400 PM CST.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES POSSIBLE
  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

SUMMARY...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY TODAY WHILE SPREADING NORTH ACROSS THE WATCH AREA. 
CONDITIONS ARE FAVORABLE FOR SUPERCELLS CAPABLE OF A FEW
TORNADOES...DAMAGING WINDS AND MARGINALLY SEVERE HAIL.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES WEST OF HOUSTON TEXAS
TO 20 MILES NORTH OF TEXARKANA ARKANSAS.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 22040.


...MEAD

Tornado Watches in Texas, 2015Tornado Watches in Arkansas, 2015Tornado Watches in Louisiana, 2015Every tornado watch in 2015

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.