Alert archive / Tennessee / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 40
The Storm Prediction Center issued this severe thunderstorm watch at Mar 25, 2002, 10:00 PM CST for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 25, 2002, 10:00 PM CST (04:00 UTC)
- Expired
- Mar 26, 2002, 3:00 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 67 counties
Arkansas County, AR, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Greene County, AR, Lee County, AR, Lincoln County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 71 km from the middle of the area, began a volume at 03:59 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
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 10:40 PM CST | Flash Flood Warning | MEG | Dunklin, Pemiscot | 3 hr |
The nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 4.0 hours before the alert went out and 20 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
- 306 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 699 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 343 m²/s²
- 0-3 km storm-relative helicity
- 457 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 260354 SEL0 SPC WW 260346 ARZ000-MOZ000-MSZ000-TNZ000-260900- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 40 STORM PREDICTION CENTER NORMAN OK 946 PM CST MON MAR 25 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EASTERN ARKANSAS THE MISSOURI BOOTHEEL NORTHERN MISSISSIPPI WEST AND MIDDLE TENNESSEE EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1000 PM UNTIL 300 AM CST. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 90 STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES SOUTHWEST OF OXFORD MISSISSIPPI TO 50 MILES NORTHEAST OF DYERSBURG TENNESSEE. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 37. WATCH NUMBER 37 WILL NOT BE IN EFFECT AFTER 1000 PM CST. CONTINUE...WW 38...WW 39... DISCUSSION...THUNDERSTORMS EXPECTED TO MOVE/INTENSIFY NEWD ACROSS WATCH AREA THROUGH EARLY TUESDAY AS REGION IS GLANCED BY 70 KT MID LEVEL SPEED MAX/ASCENT ZONE ASSOCIATED WITH SE KS/ERN OK UPPER TROUGH. MUCH OF THE ACTIVITY MAY BE ELEVATED...POST-FRONTAL HAIL- PRODUCING SUPERCELLS...ALTHOUGH POSSIBLITY WILL ALSO EXIST FOR DEVELOPMENT OF A SQUALL LINE WITH BOWING SEGMENTS. AVIATION...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 450. MEAN STORM MOTION VECTOR 24045. ...CORFIDI 363,0870 333,0885 333,0920 363,0902 WWUS20 KWNS 260354 SEL0 SPC WW 260346 ARZ000-MOZ000-MSZ000-TNZ000-260900- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 40 STORM PREDICTION CENTER NORMAN OK 946 PM CST MON MAR 25 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EASTERN ARKANSAS THE MISSOURI BOOTHEEL NORTHERN MISSISSIPPI WEST AND MIDDLE TENNESSEE EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1000 PM UNTIL 300 AM CST. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 90 STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES SOUTHWEST OF OXFORD MISSISSIPPI TO 50 MILES NORTHEAST OF DYERSBURG TENNESSEE. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 37. WATCH NUMBER 37 WILL NOT BE IN EFFECT AFTER 1000 PM CST. CONTINUE...WW 38...WW 39... DISCUSSION...THUNDERSTORMS EXPECTED TO MOVE/INTENSIFY NEWD ACROSS WATCH AREA THROUGH EARLY TUESDAY AS REGION IS GLANCED BY 70 KT MID LEVEL SPEED MAX/ASCENT ZONE ASSOCIATED WITH SE KS/ERN OK UPPER TROUGH. MUCH OF THE ACTIVITY MAY BE ELEVATED...POST-FRONTAL HAIL- PRODUCING SUPERCELLS...ALTHOUGH POSSIBLITY WILL ALSO EXIST FOR DEVELOPMENT OF A SQUALL LINE WITH BOWING SEGMENTS. AVIATION...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 450. MEAN STORM MOTION VECTOR 24045. ...CORFIDI 363,0870 333,0885 333,0920 363,0902
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 6:30 PM CST | Severe Thunderstorm Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Columbia, Drew and 3 more | 6 hr |
| Mar 25, 11:00 PM CST | Severe Thunderstorm Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Cleveland, Desha and 3 more | 6 hr |
| Mar 26, 12:00 AM CST | Severe Thunderstorm Watch | SPC | Amite, Pike, Walthall, Wilkinson | 5 hr |
Nearby
Severe Thunderstorm Watches in Tennessee, 2002Severe Thunderstorm Watches in Mississippi, 2002Severe Thunderstorm Watches in Arkansas, 2002Every severe thunderstorm watch in 2002
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.