Alert archive / Louisiana / Flash Flood Warnings in 2008
Flash Flood Warning 51, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood warning at Aug 19, 2008, 11:12 AM CDT for Claiborne Parish, Union Parish, Louisiana; Union County, Arkansas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 19, 2008, 11:12 AM CDT (16:12 UTC)
- Expired
- Aug 19, 2008, 2:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Union County, AR, Claiborne Parish, LA, Union Parish, LA
The radar
The Shreveport radar (KSHV), 124 km from the middle of the area, began a volume at 16:15 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, 4.2 hours before the alert went out and 115 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
- 808 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 456 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Aug 19, 11:05 AM CDT, 7 minutes earlier.
Area forecast discussion, Aug 19, 11:05 AM CDT, 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SHREVEPORT LA 1105 AM CDT TUE AUG 19 2008 .DISCUSSION... SHOWERS WITH EMBEDDED TSTMS CONTINUE TO DEVELOP AND MOVE NORTH ACROSS MUCH THE CWA AS OF LATE MORNING. THIS TREND SHOULD CONTINUE THROUGHOUT THE AFTERNOON...AS 20 KT LOW LEVEL WINDS CONTINUE TO PUMP MOISTURE INTO THE REGION. CURRENT FORECAST WITH NEAR 100 PERCENT POPS STILL LOOKS OK. FORECAST HIGH TEMPS MAY BE A LITTLE ON THE WARM SIDE...BUT THERE IS A LITTLE SUN IN THE SOUTHEAST ZONES AT THIS TIME...ALLOWING FOR SOME WARM UP. MINOR ADJUSTMENTS DOWNWARD WILL BE MADE IN NORTHWEST...AS THE RAIN SHOULD CONTINUE IN THIS AREA THROUGHOUT THE AFTERNOON. NO OTHER CHANGES AT THIS TIME. FLOOD WATCH ANTICIPATED FOR THE AFTERNOON FORECAST ISSUE... SINCE THIS EVENT WILL EVOLVE OVER THE NEXT 36 TO 48 HOURS. HOWEVER LOCALIZED HEAVY AMOUNTS COULD LEAD TO A FLASH FLOOD WARNING OR TWO BEFORE THEN. && .AVIATION... LARGE AREAS OF SHRA WILL CONTINUE TO PASS ACROSS THE CWA TODAY...AFFECTING THE FLIGHT OPERATIONS ACROSS THE AREA. IFR AND MVFR WILL BE THE MAIN FLIGHT CATEGORIES WE WILL OBSERVE THROUGH MUCH OF THE DAY...WITH SOME ISOLATED TSRA AFFECTING A FEW TERMINALS. THE UPPER LOW OVER NORTH TEXAS WILL CONTINUE TO PULL UP MOISTURE THROUGH THE NEXT 24 HRS...SO OCCASIONAL SHRA AND TSRA ACTIVITY WILL REMAIN POSSIBLE THROUGH THE 18Z TAF PERIOD. VSBYS AND CEILINGS WILL BE UP AND DOWN SO A FEW AMENDMENTS MAY BE COMMON THROUGH THE DAY...ESPECIALLY WHEN TS APPROACH TERMINALS. /11/ && .PRELIMINARY POINT TEMPS/POPS... SHV 80 68 82 68 88 / 100 70 70 50 50 MLU 83 69 81 69 86 / 90 70 70 70 50 DEQ 78 66 81 66 86 / 90 70 80 60 50 TXK 80 67 81 67 88 / 100 70 80 60 50 ELD 78 67 81 68 87 / 100 70 80 70 50 TYR 80 69 82 68 89 / 100 60 60 40 40 GGG 80 68 82 67 88 / 100 60 60 50 50 LFK 83 71 84 70 90 / 90 60 70 50 50 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...NONE. LA...NONE. OK...NONE. TX...NONE. && 14
Hazardous weather outlook, Aug 19, 5:00 AM CDT, 6 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 500 AM CDT TUE AUG 19 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>167-191700- SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE- COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN- UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA- NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE- FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG- HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA- SAN AUGUSTINE-SABINE TX- 500 AM CDT TUE AUG 19 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...TODAY AND TONIGHT... SCATTERED THUNDERSTORMS WILL BE POSSIBLE ACROSS THE ENTIRE FOUR STATE REGION THROUGH TONIGHT. WHILE SEVERE STORMS ARE NOT EXPECTED...THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS OF 35 TO 40 MILES AN HOUR. IN ADDITION...HEAVY RAINFALL MAY RESULT IN THE PONDING OF WATER ON AREA ROADWAYS AND LOW LYING AREAS ACROSS THE ENTIRE FOUR STATE REGION BEGINNING TONIGHT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... THE POSSIBILITY OF HEAVY RAINFALL WILL CONTINUE THROUGH WEDNESDAY...AS A SLOW MOVING UPPER LEVEL LOW MOVES TOWARD THE AREA. A WIDESPREAD 2 TO 4 INCHES OF RAIN WILL BE POSSIBLE BEFORE ENDING...WHICH MAY RESULT IN SOME LOCALIZED FLOODING. LATER FORECASTS WILL BETTER PINPOINT THE AREA AT GREATEST RISK FOR FLASH FLOODING. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF STORM SPOTTER GROUPS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER OPERATIONS...IS NOT EXPECTED THROUGH TONIGHT. BUTTS
In the hours before
Special weather statement, Aug 19, 5:21 AM CDT, 5 hours 51 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 3:44 PM CDT | Flood Watch | SHV | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more | 23 hr |
| Aug 19, 3:10 PM CDT | Flash Flood Warning | SHV | Caldwell, Jackson, Ouachita, Winn | 3 hr |
| Aug 19, 6:16 PM CDT | Flash Flood Warning | SHV | Caldwell, Jackson, Lincoln, Ouachita, Union, Winn | 3 hr |
Nearby
Flash Flood Warnings in Louisiana, 2008Flash Flood Warnings in Arkansas, 2008Every flash flood 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.