Alert archive / Louisiana / Tornado Watches in 2001
Tornado Watch 830
The Storm Prediction Center issued this tornado watch at Nov 26, 2001, 11:00 PM CST for Ashley County, Chicot County, Arkansas; 20 parishes in Louisiana; 17 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 26, 2001, 11:00 PM CST (05:00 UTC)
- Expired
- Nov 27, 2001, 4:00 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Ashley County, AR, Chicot County, AR, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Montgomery County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Yazoo County, MS
The radar
The Ft Polk radar (KPOE), 157 km from the middle of the area, began a volume at 05:01 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.
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 26, 11:30 PM CST | Flash Flood Warning | JAN | Ashley | 3 hr |
| Nov 26, 11:58 PM CST | Tornado Warning | SHV | Natchitoches | 32 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 5.0 hours before the alert went out and 154 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
- 701 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 270457 SEL0 SEL0 SPC WW 270432 ARZ000-LAZ000-MSZ000-271000- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 830 STORM PREDICTION CENTER NORMAN OK 1032 PM CST MON NOV 26 2001 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EXTREME SOUTHEAST ARKANSAS NORTHEAST LOUISIANA NORTH CENTRAL MISSISSIPPI EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1100 PM UNTIL 400 AM 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 70 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES WEST OF ALEXANDRIA LOUISIANA TO 30 MILES NORTHEAST OF GREENWOOD MISSISSIPPI. 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 828. WATCH NUMBER 828 WILL NOT BE IN EFFECT AFTER 1100 PM CST. CONTINUE...WW 827...WW 829... DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS CONTINUE OVER PARTS OF NORTHERN LA AND SOUTHEAST AR. THESE STORMS ARE EXPECTED TO MAINTAIN THEIR INTENSITY AND TRACK NORTHEASTWARD INTO CENTRAL MS DURING THE NEXT FEW HOURS. STRONG LOW LEVEL VERTICAL SHEAR AND AMPLE INSTABILITY WILL CONTINUE THE THREAT OF ISOLATED TORNADOES... DAMAGING WINDS...AND LARGE HAIL IN STRONGER CELLS. 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 24035. ...HART 312,0943 334,0905 334,0882 312,0920 WWUS20 KWNS 270457 SEL0 SPC WW 270432 ARZ000-LAZ000-MSZ000-271000- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 830 STORM PREDICTION CENTER NORMAN OK 1032 PM CST MON NOV 26 2001 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EXTREME SOUTHEAST ARKANSAS NORTHEAST LOUISIANA NORTH CENTRAL MISSISSIPPI EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1100 PM UNTIL 400 AM 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 70 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES WEST OF ALEXANDRIA LOUISIANA TO 30 MILES NORTHEAST OF GREENWOOD MISSISSIPPI. 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 828. WATCH NUMBER 828 WILL NOT BE IN EFFECT AFTER 1100 PM CST. CONTINUE...WW 827...WW 829... DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS CONTINUE OVER PARTS OF NORTHERN LA AND SOUTHEAST AR. THESE STORMS ARE EXPECTED TO MAINTAIN THEIR INTENSITY AND TRACK NORTHEASTWARD INTO CENTRAL MS DURING THE NEXT FEW HOURS. STRONG LOW LEVEL VERTICAL SHEAR AND AMPLE INSTABILITY WILL CONTINUE THE THREAT OF ISOLATED TORNADOES... DAMAGING WINDS...AND LARGE HAIL IN STRONGER CELLS. 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 24035. ...HART 312,0943 334,0905 334,0882 312,0920
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 26, 6:00 PM CST | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 9 more | 5 hr |
| Nov 26, 8:00 PM CST | Severe Thunderstorm Watch | SPC | Beauregard, Vernon | 5 hr |
| Nov 27, 12:00 AM CST | Tornado Watch | SPC | Allen, Beauregard, Calcasieu, Rapides, Vernon | 5 hr |
| Nov 26, 11:00 PM CST | Tornado Watch | SPC | Alcorn, Benton, Calhoun, Chickasaw, Itawamba, Lafayette and 12 more | 5 hr |
Nearby
Tornado Watches in Louisiana, 2001Tornado Watches in Mississippi, 2001Tornado Watches in Arkansas, 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; radar from the NEXRAD Level II archive.