Alert archive / Texas / Flash Flood Warnings in 1990
Flash Flood Warning 37, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood warning at May 12, 1990, 6:36 PM CDT for Panola County, Rusk County, Shelby County, Texas. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 12, 1990, 6:36 PM CDT (23:36 UTC)
- Expired
- May 12, 1990, 9:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Panola County, TX, Rusk County, TX, Shelby County, TX
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.6 hours before the alert went out and 240 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
- 1655 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 555 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 280 m²/s²
- 0-3 km storm-relative helicity
- 430 m²/s²
- Significant tornado parameter
- 3.6
- Supercell composite
- 16.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 122337 RRA FFWSHV TXC365-401-419-130245- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 636 PM CDT SAT MAY 12 1990 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHEAST TEXAS ...PANOLA COUNTY...RUSK COUNTY...SHELBY COUNTY AT 635 PM CDT WEATHER SERVICE RADAR SHOWED A BAND OF SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL OVER AN AREA THAT HAS RECEIVED FROM NEAR FOUR TO OVER SIX INCHES OF RAIN. THE BAND WAS ABOUT 30 MILES WIDE AND EXTENDED FROM NEAR MARSHALL AND SCOTTSVILLE SOUTHWEST TO NEAR CARTHAGE AND REKLAW TEXAS AND ON SOUTHWEST. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
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.
In the hours before
Special weather statement, May 12, 5:13 PM CDT, 1 hour 23 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-130000- SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 510 PM CDT SAT MAY 12 1990 ...A SEVERE THUNDERSTORM WARNING IS IN EFFECT UNTIL 615 PM FOR RUSK.. GREGG AND HARRISON COUNTIES IN NORTHEAST TEXAS... ...A TORNADO WATCH IN EFFECT UNTIL 900 PM CDT FOR NORTH AND CENTRAL LOUISIANA AND EAST TEXAS... ...FLASH FLOOD WATCH IN EFFECT FOR EAST TEXAS AND NORTHWEST LOUSIANA FOR TONIGHT... ...FLASH FLOOD WARNING IN EFFECT UNTIL 530 PM CDT FOR WINN..CADDO.. BOSSIER..DE SOTO..RED RIVER..NATCHITOCHES..WEBSTER..SABINE..AND BIENVILLE PARISHES IN NORTH LOUISIANA AND HARRISON..PANOLA..RUSK.. AND SHELBY COUNTIES IN EAST TEXAS... ...A SEVERE THUNDERSTORM WARNING ISSUED EARLIER HAS EXPIRED FOR FOR FRANKLIN AND TENSAS PARISHES IN NORTHEAST LOUISIANA... AT 505 PM WEATHER SERVICE RADAR IN SHREVEPORT SHOWED DEVELOPING STRONG THUNDERSTORMS OVER NORTHEAST TEXAS BETWEEN LONGVIEW AND TYLER TEXAS. MOVEMENT WAS EAST AT 45 MPH. HIGH WINDS..HAIL..HEAVY RAINFALL AND DANGEROUS LIGHTNING WILL BE LIKELY WITH THESE STORMS. ALSO WEATHER RADAR SHOWED SCATTERED SHOWERS AND THUNDERSTORMS OVER NORTH CENTRAL AND NORTHEAST LOUISIANA. MOVEMENT WAS TO THE EAST AT ABOUT 40 MPH. THIS AREA HAS DECREASED IN AREAL COVERAGE IN THE PAST HOUR BUT IS STILL PRODUCING LOCALLY HEAVY RAINFALL. WINNFIELD LOUISIANA HAD REPORTED 5.60 INCHES OF RAIN SINCE AROUND 600 AM CDT..RAINFALL AT THE WEATHER SERVICE OFFICE IN SHREVPORT DURING THE PAST 24 HOURS 3.94 INCHES. RADAR AND SATELLITE ESTIMATES INDICATED THAT RAINFALL AMOUNTS OF THREE TO NEAR SIX INCHES HAS FALLEN OVER THE ARKLATEX REGION. THE EXCESS WATER RUNOFF HAS ONLY ADaDED TO THE ALREADY SATURATED SOIL CONDITIONS AND WILL CAUSE ADDITONAL FLOODING OF RURAL AND SECONDARY ROADS ADJACENT TO STREAMS ..CREEKS..AND BAYOUS. PERSONS ARE URGED NOT TO DRIVE INTO FLOODED ROADWAYS.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 2:06 AM CDT | Severe Thunderstorm Warning | SHV | Panola | 54 min |
| May 12, 2:20 AM CDT | Tornado Warning | SHV | Panola | 25 min |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | Gregg, Harrison, Marion, Panola, Rusk | 4 hr |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | Shelby | 4 hr |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Panola, Rusk | 60 min |
| May 12, 11:33 AM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass | 57 min |
| May 12, 1:09 PM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass | 66 min |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Panola, Rusk, Shelby | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Harrison | 4 hr |
| May 12, 5:09 PM CDT | Severe Thunderstorm Warning | SHV | Gregg, Harrison, Rusk | 66 min |
| May 12, 6:12 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Panola, Rusk | 63 min |
Nearby
Flash Flood Warnings in Texas, 1990Every flash flood warning in 1990
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.