Alert archive / Louisiana / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 28
The Storm Prediction Center issued this severe thunderstorm watch at Mar 15, 2002, 5:00 PM CST for 22 parishes in Louisiana. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 15, 2002, 5:00 PM CST (23:00 UTC)
- Expired
- Mar 15, 2002, 10:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Winn Parish, LA
The radar
The Shreveport radar (KSHV), 74 km from the middle of the area, began a volume at 23:02 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 |
|---|---|---|---|---|
| Mar 15, 7:32 PM CST | Severe Thunderstorm Warning | JAN | Morehouse | 28 min |
| Mar 15, 9:54 PM CST | Severe Thunderstorm Warning | JAN | Morehouse | 36 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 11.0 hours before the alert went out and 67 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
- 788 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 524 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 255 m²/s²
- 0-3 km storm-relative helicity
- 364 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 152248 SEL8 SPC WW 152244 LAZ000-160400- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 28 STORM PREDICTION CENTER NORMAN OK 444 PM CST FRI MAR 15 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHERN LOUISIANA EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 500 PM UNTIL 1000 PM 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 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTHWEST OF SHREVEPORT LOUISIANA TO 40 MILES SOUTHEAST OF MONROE LOUISIANA. 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... CONTINUE...WW 26...WW 27... DISCUSSION...CONVECTION CONTINUES TO INCREASE IN SURFACE CONFLUENCE ZONE ACROSS CENTRAL LA WITHIN A VERY UNSTABLE AIR MASS. DEEP LAYER SHEAR WILL BE SUFFICIENT FOR ORGANIZED CONVECTION...INCLUDING A FEW SUPERCELLS...WITH PRIMARY THREATS OF LARGE HAIL AND DAMAGING WINDS. 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 500. MEAN STORM MOTION VECTOR 24020. ...EVANS 330,0940 325,0913 311,0913 312,0940 WWUS20 KWNS 152248 SEL8 SPC WW 152244 LAZ000-160400- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 28 STORM PREDICTION CENTER NORMAN OK 444 PM CST FRI MAR 15 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHERN LOUISIANA EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 500 PM UNTIL 1000 PM 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 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTHWEST OF SHREVEPORT LOUISIANA TO 40 MILES SOUTHEAST OF MONROE LOUISIANA. 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... CONTINUE...WW 26...WW 27... DISCUSSION...CONVECTION CONTINUES TO INCREASE IN SURFACE CONFLUENCE ZONE ACROSS CENTRAL LA WITHIN A VERY UNSTABLE AIR MASS. DEEP LAYER SHEAR WILL BE SUFFICIENT FOR ORGANIZED CONVECTION...INCLUDING A FEW SUPERCELLS...WITH PRIMARY THREATS OF LARGE HAIL AND DAMAGING WINDS. 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 500. MEAN STORM MOTION VECTOR 24020. ...EVANS 330,0940 325,0913 311,0913 312,0940
Nearby
Severe Thunderstorm Watches in Louisiana, 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.