Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 110, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 12, 1990, 6:48 PM CDT for Caddo Parish, De Soto Parish, Louisiana. It was in force for 57 min. 2 reports 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
- May 12, 1990, 6:48 PM CDT (23:48 UTC)
- Expired
- May 12, 1990, 7:45 PM CDT
- In force
- 57 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Caddo Parish, LA, De Soto Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 7:25 PM CDT | Hail 1 | Caddo, LA | |
| May 12, 7:30 PM CDT | Hail 0.75 | De Soto, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.8 hours before the alert went out and 251 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, May 12, 5:13 PM CDT, 1 hour 35 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, 1:57 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 48 min |
| May 12, 2:29 AM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Webster | 61 min |
| May 12, 2:48 AM CDT | Tornado Warning | SHV | De Soto | 57 min |
| May 12, 5:13 AM CDT | Severe Thunderstorm Warning | SHV | Natchitoches | 62 min |
| May 12, 5:57 AM CDT | Severe Thunderstorm Warning | SHV | Winn | 63 min |
| May 12, 8:09 AM CDT | Severe Thunderstorm Warning | SHV | De Soto | 66 min |
| May 12, 8:49 AM CDT | Tornado Warning | SHV | Sabine | 56 min |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo, Red River, Webster | 4 hr |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | De Soto, Natchitoches, Sabine | 4 hr |
| May 12, 9:42 AM CDT | Tornado Warning | SHV | Natchitoches | 48 min |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Winn | 60 min |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Ouachita | 60 min |
| May 12, 11:46 AM CDT | Severe Thunderstorm Warning | SHV | Caddo, De Soto | 59 min |
| May 12, 11:46 AM CDT | Severe Thunderstorm Warning | SHV | Franklin | 59 min |
| May 12, 12:25 PM CDT | Severe Thunderstorm Warning | SHV | Madison, Tensas | 65 min |
| May 12, 12:41 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, De Soto, Red River | 94 min |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Bienville, Bossier, Webster | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | De Soto, Sabine | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Caddo | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Natchitoches, Red River | 4 hr |
| May 12, 1:50 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 55 min |
| May 12, 2:44 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Winn | 61 min |
| May 12, 3:08 PM CDT | Flash Flood Warning | SHV | Winn | 2 hr |
| May 12, 3:51 PM CDT | Severe Thunderstorm Warning | SHV | Franklin, Tensas | 69 min |
| 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, 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 |
| May 12, 6:36 PM CDT | Flash Flood Warning | SHV | Panola, Rusk, Shelby | 3 hr |
| May 12, 1:32 PM CDT | Severe Thunderstorm Warning | SHV | Columbia | 58 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.