Alert archive / Louisiana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 39, NWS Shreveport, LA

March 30, 2002Webster Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 30, 2002, 8:59 PM CST for Webster Parish, Louisiana. It was in force for 61 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 30, 2002, 8:59 PM CST (02:59 UTC)
Expired: Mar 30, 2002, 10:00 PM CST
In force: 61 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Webster Parish, LA

The radar

The Shreveport radar (KSHV), 48 km from the middle of the area, began a volume at 03:02 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.

What was reported inside it

Time	Report	Where	Remark
Mar 30, 9:15 PM CST	Hail 0.75	Minden, LA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 30, 5:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 3.0 hours before the alert went out and 39 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 7 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 370 m²/s²
0-3 km storm-relative helicity: 459 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

416 
WUUS54 KSHV 310259
SVRSHV
LAC119-310400-
/NEW.KSHV.SV.W.0075.310258-310400/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
858 PM CST SAT MAR 30 2002

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEBSTER PARISH IN NORTHWEST LOUISIANA

* UNTIL 1000 PM CST

* AT 858 PM CST...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES SOUTH OF SIBLEY...OR
  ABOUT 13 MILES SOUTH OF MINDEN...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE MOVING THROUGH SOUTHERN WEBSTER
  PARISH BETWEEN 900 PM AND 930 PM AND WILL PRODUCE UP TO ONE INCH
  DIAMETER HAIL.

A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES WITH LITTLE OR NO WARNING. BE READY TO ACT QUICKLY.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE 
THUNDERSTORM WARNING FOR...
  WEBSTER PARISH IN NORTHWEST LOUISIANA
UNTIL 1000 PM CST.

LAT...LON 3248 9342 3245 9330 3276 9326 3284 9341

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 7:10 PM CST	Severe Thunderstorm Warning	SHV	Caddo	65 min
Mar 30, 7:19 PM CST	Severe Thunderstorm Warning	SHV	Caldwell, Ouachita	41 min
Mar 30, 7:38 PM CST	Severe Thunderstorm Warning	SHV	De Soto	37 min
Mar 30, 7:44 PM CST	Severe Thunderstorm Warning	SHV	Bossier	46 min
Mar 30, 8:52 PM CST	Tornado Warning	SHV	De Soto, Sabine	53 min
Mar 30, 10:11 PM CST	Tornado Warning	SHV	Sabine	34 min
Mar 30, 10:23 PM CST	Tornado Warning	SHV	Natchitoches	52 min
Mar 31, 3:55 AM CST	Severe Thunderstorm Warning	SHV	Caddo	65 min
Mar 31, 5:37 AM CST	Severe Thunderstorm Warning	SHV	Sabine	53 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2002 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.