Alert archive / Mississippi / Tornado Watches in 2001
Tornado Watch 839
The Storm Prediction Center issued this tornado watch at Nov 29, 2001, 10:00 AM CST for Baldwin County, Mobile County, Alabama; Saint Bernard Parish, Louisiana; 6 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 29, 2001, 10:00 AM CST (16:00 UTC)
- Expired
- Nov 29, 2001, 3:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Baldwin County, AL, Mobile County, AL, Saint Bernard Parish, LA, George County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Stone County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 4.0 hours before the alert went out and 128 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1609 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 492 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 286 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 10.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 291556 SEL9 SEL9 SPC WW 291549 ALZ000-LAZ000-MSZ000-CWZ000-292100- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 839 STORM PREDICTION CENTER NORMAN OK 949 AM CST THU NOV 29 2001 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHWEST ALABAMA EXTREME SOUTHEAST LOUISIANA SOUTHEAST MISSISSIPPI COASTAL WATERS EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 1000 AM UNTIL 300 PM CST. TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH NORTHEAST OF GULFPORT MISSISSIPPI TO 60 MILES EAST OF BOOTHVILLE LOUISIANA. 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... CONTINUE...WW 838... DISCUSSION...NWRN GULF OF MEXICO UPPER TROUGH IS BEGINNING TO EJECT NE ACROSS THE LWR MS VLY. STRENGTHENING LARGE SCALE ASCENT/ PRESSURE FALLS AHEAD OF ASSOCIATED COLD FRONT...ALONG WITH DAYTIME HEATING...WILL CREATE INCREASINGLY FAVORABLE ENVIRONMENT FOR SUPERCELL DEVELOPMENT OVER WW AREA. COUPLED WITH RICH BOUNDARY LAYER MOISTURE INFLOW...SETUP APPEARS FAVORBALE FOR A COUPLE TORNADOES IN ADDITION TO DAMAGING WINDS AND POSSIBLY HAIL. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 22045. ...CORFIDI 310,0873 291,0870 291,0893 310,0900
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 29, 12:00 PM CST | Tornado Watch | SPC | Autauga, Bibb, Blount, Butler, Chilton, Choctaw and 36 more | 5 hr |
| Nov 29, 4:15 AM CST | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 21 more | 5 hr |
| Nov 29, 8:15 AM CST | Tornado Watch | SPC | East Carroll, East Feliciana, Madison, Saint Helena, Tensas, Washington and 1 more | 5 hr |
Nearby
Tornado Watches in Mississippi, 2001Tornado Watches in Alabama, 2001Tornado Watches in Louisiana, 2001Every tornado watch in 2001
Sources
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.