Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 333, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 22, 2008, 4:10 PM CDT for Bossier Parish, Caddo Parish, Webster Parish, Louisiana; Columbia County, Lafayette County, Arkansas. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 22, 2008, 4:10 PM CDT (21:10 UTC)
- Expired
- May 22, 2008, 4:45 PM CDT
- In force
- 35 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Columbia County, AR, Lafayette County, AR, Bossier Parish, LA, Caddo Parish, LA, Webster Parish, LA
The radar
The Shreveport radar (KSHV), 56 km from the middle of the area, began a volume at 21:13 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.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.2 hours before the alert went out and 50 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
- 1485 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 587 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 22, 3:33 PM CDT, 37 minutes earlier.
Area forecast discussion, May 22, 3:33 PM CDT, 37 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SHREVEPORT LA 333 PM CDT THU MAY 22 2008 .DISCUSSION... SCATTERED STRONG TSTMS...WITH HAIL POTENTIAL...STREAMING NORTHWARD ACROSS CENTRAL LA...INTO NORTHERN PARTS OF STATE. ISOLATED SMALLER CELLS POPPING UP OVER NW LA/EXTREME SW AR. PLACING CHANCE POPS FOR TSTMS OVER AND JUST NORTH OF STRONGER ACTIVITY...ISOLATED FURTHER NORTH. AS DAYTIME HEATING IS MAIN TRIGGER...CARRYING CONVECTION UNTIL AROUND SUNSET. UPPER RIDGE OVERHEAD BUILDING OVERHEAD IN RESPONSE TO DIGGING UPPER TROF OVER ROCKIES...PLAINLY SEEN ON WATER VAPOR. THROUGH MOST OF THE HOLIDAY WEEKEND...KEEP ISOLATED DIURNAL CONVECTION...WITH TEMPERATURES INCHING UPWARD TO AROUND MID 90S...AND SOUTHERLY BREEZE...ALTHOUGH NOT AS STRONG AS TODAY. SRONGER MID LEVEL CAP NOTED BY MEMORIAL DAY...SO LEFT OUT POPS FROM SUNDAY NIGHT UNTIL COLD FRONT BEGINS TO ARRIVE LATE TUESDAY. THIS FRONT WILL BARELY PUSH THRU AREA AS IT MANEURVERS AROUND DISRUPTED UPPER RIDGE...BUT SHOULD PROVIDE ENOUGH FOCUS FOR SCATTERED CONVECTION... AND WILL BRING TEMPS BACK DOWN NEAR SEASONAL VALUES BY END OF EXTENDED/VII/ && .AVIATION... SOUTHERLY FLOW WILL PERSIST OVER THE REGION AS A DEEP UPPER LEVEL LOW PRESSURE SYSTEM REMAINS NEARLY STATIONARY OVER THE ROCKIES THE NEXT SEVERAL DAYS. THUS HIGH PRESSURE WILL BUILD OVER OUR AREA ALOFT WHILE GULF MOISTURE STREAMS IN BENEATH IT. THUS EXPECT VERY WARM AND HUMID WEATHER WITH MVFR CIGS COMMONPLACE FROM MIDNIGHT UNTIL MIDDAY...LIFTING TO VFR CIGS MAINLY DURING THE AFTERNOON AND EVENING. THE HEAT AND HUMIDITY WILL COMBINE TO PRODUCE SCATTERED CONVECTIVE ACTIVITY EACH DAY AS WELL. /17/ && .PRELIMINARY POINT TEMPS/POPS... SHV 72 93 73 95 / 20 20 20 20 MLU 69 92 71 95 / 20 20 20 20 DEQ 69 89 71 95 / 10 20 20 30 TXK 69 92 71 95 / 20 20 20 30 ELD 69 91 70 94 / 20 20 20 20 TYR 72 93 74 95 / 10 20 20 30 GGG 72 93 74 95 / 20 20 20 20 LFK 73 95 74 94 / 20 20 20 20 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...NONE. LA...NONE. OK...NONE. TX...NONE. &&
Hazardous weather outlook, May 22, 1:49 PM CDT, 2 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE SHREVEPORT LA 149 PM CDT THU MAY 22 2008 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-231100- ANGELINA-BIENVILLE-BOSSIER-BOWIE-CADDO-CALDWELL-CAMP-CASS-CHEROKEE- CLAIBORNE-COLUMBIA-DE SOTO-FRANKLIN-GRANT-GREGG-HARRISON-HEMPSTEAD- HOWARD-JACKSON-LA SALLE-LAFAYETTE-LINCOLN-LITTLE RIVER-MARION- MCCURTAIN-MILLER-MORRIS-NACOGDOCHES-NATCHITOCHES-NEVADA-OUACHITA- PANOLA-RED RIVER LA-RED RIVER TX-RUSK-SABINE LA-SABINE TX- SAN AUGUSTINE-SEVIER-SHELBY-SMITH-TITUS-UNION AR-UNION LA-UPSHUR- WEBSTER-WINN-WOOD- 149 PM CDT THU MAY 22 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA... NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED SHOWERS AND THUNDERSTORMS WILL INCREASE ACROSS THE EAST TEXAS LAKES AREA BY EARLY THIS AFTERNOON...AS A WEAK UPPER LEVEL DISTURBANCE FROM SOUTH TEXAS...MOVES NORTHEAST INTO THE AREA. MORE ISOLATED DEVELOPMENT CAN BE EXPECTED LATER IN THE AFTERNOON NORTH OF INTERSTATE 20. WITH THE STRONG INSTABILITY PRESENT...AN ISOLATED STORM COULD BECOME SEVERE...PRODUCING HAIL AND BRIEF DAMAGING WIND GUSTS. HOWEVER...FOR THE MOST PART...FREQUENT DEADLY LIGHTNING CAN BE EXPECTED WITH THUNDERSTORMS...WITH THE OVERALL THREAT OF SEVERE WEATHER APPEARING MINIMAL. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER...HAM RADIO OPERATOR...AND EMERGENCY MANAGEMENT PERSONNEL ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON OR TONIGHT. VII
In the hours before
Local storm report, May 22, 4:07 PM CDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
407 PM CDT THU MAY 22 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM HAIL 2 SE MARSHALL 32.52N 94.33W
05/22/2008 E0.75 INCH HARRISON TX TRAINED SPOTTER
PENNY SIZED HAIL ALONG I-20...CARS FORCED TO LEAVE THE
ROAD DUE TO VISIBILITY ISSUES
&&
12The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 3:30 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Marion | 45 min |
| May 22, 4:17 PM CDT | Severe Thunderstorm Warning | SHV | Cass, Marion | 43 min |
| May 22, 4:30 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Marion | 45 min |
| May 22, 5:13 PM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass | 32 min |
| May 22, 2:18 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Winn | 57 min |
| May 22, 3:39 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Grant, Jackson, Natchitoches, Winn | 36 min |
| May 22, 4:01 PM CDT | Severe Thunderstorm Warning | SHV | Grant, LaSalle | 44 min |
| May 22, 5:50 PM CDT | Severe Thunderstorm Warning | SHV | Union | 40 min |
| May 22, 4:34 PM CDT | Severe Thunderstorm Warning | SHV | Columbia | 41 min |
| May 22, 5:04 PM CDT | Severe Thunderstorm Warning | SHV | Miller | 41 min |
| May 22, 5:18 PM CDT | Severe Thunderstorm Warning | SHV | Nevada | 27 min |
| May 22, 5:31 PM CDT | Severe Thunderstorm Warning | SHV | Columbia, Nevada | 29 min |
| May 22, 5:42 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Little River, Miller, Nevada, Sevier | 48 min |
| May 22, 6:19 PM CDT | Severe Thunderstorm Warning | SHV | Howard, Sevier | 56 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2008Severe Thunderstorm Warnings in Arkansas, 2008Every severe thunderstorm warning in 2008
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.