Tornado Watch 550

Issued

Nov 17, 2015, 7:45 PM CST (01:45 UTC)

Expired

Nov 18, 2015, 3:00 AM CST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Jackson/Brandon,MS radar (KDGX), 96 km from the middle of the area, began a volume at 01:47 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

30%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

5%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1974Nov 17, 5:54 PM CST
• Mesoscale Discussion 1975Nov 17, 6:53 PM CST
• Mesoscale Discussion 1976Nov 17, 11:11 PM CST
• Mesoscale Discussion 1977Nov 18, 1:14 AM CST

807 
WWUS20 KWNS 180142
SEL0  
SPC WW 180142
LAZ000-MSZ000-CWZ000-180900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 550
NWS STORM PREDICTION CENTER NORMAN OK
740 PM CST TUE NOV 17 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHERN AND EASTERN LOUISIANA
  SOUTHERN AND CENTRAL MISSISSIPPI
  COASTAL WATERS

* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 740 PM
  UNTIL 300 AM CST.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...SQUALL LINE NOW EXTENDING FROM THE NORTHWESTERN GULF OF
MEXICO NORTH-NORTHEAST INTO WESTERN MISSISSIPPI EXPECTED TO CONTINUE
SLOWLY EWD THROUGH EARLY WEDNESDAY...WHILE INDIVIDUAL STORMS MOVE
RAPIDLY NORTH-NORTHEAST WITHIN IT. SETUP WILL REMAIN FAVORABLE FOR
THE DEVELOPMENT OF EMBEDDED SUSTAINED STORMS...SMALL BOWING
SEGMENTS...AND POSSIBLE SUPERCELLS WITH AN ATTENDANT RISK FOR
DAMAGING WIND AND AN OCCASIONAL TORNADO.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF
JACKSON MISSISSIPPI TO 50 MILES SOUTHWEST OF HOUMA LOUISIANA. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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.

&&

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 547...TORNADO WATCH NUMBER 549. WATCH NUMBER 547 549
WILL NOT BE IN EFFECT AFTER 740 PM CST. 

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
450. MEAN STORM MOTION VECTOR 21050.


...CORFIDI

Tornado Watches in Mississippi, 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.