Tornado Watch 887

Issued

Nov 16, 2011, 2:20 AM CST (08:20 UTC)

In effect from

Nov 16, 2011, 2:25 AM CST

Expired

Nov 16, 2011, 10:00 AM CST

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Jackson/Brandon,MS radar (KDGX), 100 km from the middle of the area, began a volume at 08:19 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

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

20%

One or more gusts of 65 knots or more

5%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

50%

• Mesoscale Discussion 2328Nov 16, 1:35 AM CST
• Mesoscale Discussion 2329Nov 16, 5:33 AM CST
• Mesoscale Discussion 2330Nov 16, 7:25 AM CST
• Mesoscale Discussion 2331Nov 16, 9:59 AM CST

822 
WWUS20 KWNS 160826
SEL7
SPC WW 160826
ALZ000-LAZ000-MSZ000-161600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 887
NWS STORM PREDICTION CENTER NORMAN OK
225 AM CST WED NOV 16 2011

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

       WESTERN AND CENTRAL ALABAMA
       SOUTHEASTERN LOUISIANA
       EASTERN AND SOUTHERN MISSISSIPPI

EFFECTIVE THIS WEDNESDAY MORNING FROM 225 AM UNTIL 1000 AM CST.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTHEAST OF MC COMB
MISSISSIPPI TO 40 MILES NORTH NORTHWEST OF BIRMINGHAM ALABAMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU7).

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.

DISCUSSION...SHORT BANDS/SMALL CLUSTERS OF SHOWERS/TSTMS EXPECTED TO
PERSIST OVER WW...IN STRONG...SLIGHTLY CONFLUENT LOW LVL SWLY FLOW
BENEATH AND JUST DOWNSTREAM FROM EJECTING UPR IMPULSE.  SOME
STRENGTHENING OF THE LOW TO MID LVL WIND FIELD IS EXPECTED ACROSS AL
LATER THIS MORNING /WITH SPEEDS INCREASING TO AOA 50 KTS IN THE
850-700 MB LAYER/...ALONG WITH A MODEST INCREASE IN LOW LVL MOISTURE
AND POSSIBLY ASCENT.  GIVEN DEGREE OF LOW LVL SHEAR...POTENTIAL WILL
EXIST FOR INTERMITTENT LOW LVL MESOCYCLONES AND POSSIBLE TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
400. MEAN STORM MOTION VECTOR 22040.


...CORFIDI

Tornado Watches in Alabama, 2011Tornado Watches in Mississippi, 2011Tornado Watches in Louisiana, 2011Every tornado watch in 2011

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.