Alert archive / Louisiana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 136, NWS Shreveport, LA

July 24, 2002LaSalle Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jul 24, 2002, 4:09 PM CDT for LaSalle Parish, Louisiana. It was in force for 36 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 24, 2002, 4:09 PM CDT (21:09 UTC)
Expired: Jul 24, 2002, 4:45 PM CDT
In force: 36 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County LaSalle Parish, LA

What was reported inside it

Time	Report	Where	Remark
Jul 24, 4:30 PM CDT	Thunderstorm Wind 52 E	Jena, LA	Several trees and power lines blown down.

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 nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.2 hours before the alert went out and 174 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: 1966 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1263 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 24, 3:35 PM CDT, 34 minutes earlier.

Area forecast discussion, Jul 24, 3:35 PM CDT, 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
335 PM CDT WED JUL 24 2002

PRE-FRONTAL ACTIVITY NOW INTO SRN 2/3 OF REGION...WITH FRONT LAGGING
BEHIND OVER E OK/N AR.  AFTERNOON HEATING HAS SPARKED UP QUITE A
NUMBER OF STORMS.  WILL KEEP CHANCE POPS IN TONIGHT I-20 CORRIDOR
AND SWD...WITH SYSTEM SAGGING S.  WILL CONTINUE TO KEEP RAIN CHANCES
IN FOR THURSDAY AS SYSTEM WILL BE DRAGGING IT/S FEET ACROSS THE SRN
HALF OF THE REGION.  FRIDAY PUTS THE AREA BACK IN THE SAME SCENARIO
WITH AFTERNOON HEATING ISOLATED ACTIVITY.  ADDED SLIGHT CHANCE IN
FOR SUNDAY AS GREATER SOUTHERLY FLOW WITH SURFACE HIGH PUSHING EWD.
WILL LEAVE MENTION OF HEAT INDEXES IN HEADER BUT NO ADVISORY AT THIS
TIME.

FCSTID = 20
SHV   74  95  75  96 /  40  20   0  10
MLU   74  93  74  95 /  40  20   0  20
TXK   74  97  75  96 /  20  10   0   0
TYR   75  96  75  96 /  30  20   0   0
LFK   74  95  74  95 /  30  30  10  10

.SHV...NONE.

In the hours before

Special weather statement, Jul 24, 10:30 AM CDT, 5 hours 39 minutes before

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-241640-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1030 AM CDT WED JUL 24 2002

AFTERNOON HEATING ALONG WITH A SOUTHWARD SINKING FRONTAL BOUNDARY
WILL RESULT IN SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE REGION
THIS AFTERNOON AND EVENING.  THERE WILL BE A SLIGHT RISK FOR SEVERE
WEATHER ACROSS PORTIONS OF DEEP EAST TEXAS AND ON INTO THE ADJACENT
PORTIONS OF WEST CENTRAL LOUISIANA THROUGH TONIGHT.  GUSTY WINDS AND
POSSIBLE HAIL COULD ACCOMPANY THE STRONGER STORMS...BUT NO
WIDESPREAD SEVERE WEATHER IS EXPECTED ACROSS THE REGION THROUGH
TONIGHT.

ACTIVATION OF EMERGENCY MANAGERS...STORM SPOTTERS...AND SKYWARN
NETWORKS...IS NOT ANTICIPATED THROUGH TONIGHT.

Local storm report, Jul 24, 3:06 PM CDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT, LA
306 PM CDT WED JUL 24 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0215 PM    BIENVILLE                 LA   WIND DAMAGE
07/24/02   BIENVILLE                      SEVERAL TREES DOWN IN THE
                                          PARISH. REPORTED BY LAW
                                          ENFORCEMENT.

03

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 2:13 PM CDT	Severe Thunderstorm Warning	SHV	Bienville	47 min
Jul 24, 3:16 PM CDT	Severe Thunderstorm Warning	SHV	Grant	44 min
Jul 24, 3:28 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	47 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.