Alert archive / Texas / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 34, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at May 12, 1990, 7:15 AM CDT for Nacogdoches County, Texas. It was in force for 45 min. 3 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, 7:15 AM CDT (12:15 UTC)
- Expired
- May 12, 1990, 8:00 AM CDT
- In force
- 45 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Nacogdoches County, TX
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, 7:15 AM CDT | Hail 1.75 | Nacogdoches, TX | |
| May 12, 7:15 AM CDT | Thunderstorm Wind 0 | Nacogdoches, TX | |
| May 12, 7:45 AM CDT | Tornado F1 | Nacogdoches, TX |
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, 0.3 hours before the alert went out and 214 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 KBPT 121223 COR SVRBPT TXC347-121300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING..CORRECTED...CORRECTED... NATIONAL WEATHER SERVICE PORT ARTHUR TX 715 AM CDT SAT MAY 12 1990 THE NATIONAL WEATHER SERVICE IN PORT ARTHUR HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 AM CDT FOR PERSONS IN THE FOLLOWING COUNTIES IN NORTHEAST TEXAS ...NACOGDOCHES COUNTY THE SEVERE THUNDERSTORM WARNING HAS BEEN EXTENDED UNTIL 8 AM CDT FOR NACOGDOCHES COUNTY. THE SEVERE THUNDERSTORM WAS JUST SOUTHWEST OF THE CITY OF NACOGDOCHES MOVING EAST AT 45 MPH. THIS SEVERE THUNDERSTORM WILL PRODUCE DAMAGING WINDS AND DANGEROUS LIGHTNING. HAIL IS POSSIBLE FROM THIS STORM ALONG WITH BRIEF HEAVY RAINS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADCS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. NNNN
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, 3:37 AM CDT, 3 hours 38 minutes before
LAZ005-006-007-008-011-012-120940- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE LAKE CHARLES LA 335 AM CDT SAT MAY 12 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 1000 AM CDT THAT INCLUDES VERNON PARISH IN SOUTHWEST LOUISIANA AND GRANT...LA SALLE ...AND RAPIDES PARISHES IN CENTRAL LOUISIANA... AT 325 AM...LARGE PATCHES OF RAIN MIXED WITH SCATTERED THUNDERSTORMS ...SOME WITH VERY HEAVY RAIN...EXTENDED FROM LUFKIN TEXAS...AND TOLEDO BEND RESERVOIR ACROSS MUCH OF EAST TEXAS TO BETWEEN BEAUMONT AND CONROE. SCATTERED SHOWERS AND SMALL PATCHES OF RAIN WERE SHOWN FROM NEAR LEESVILLE ...ALEXANDRIA...AND NATCHEZ MISSISSIPPI TO THE JENNINGS...SULPHUR...AND ORANGE TEXAS AREAS. ISOLATED SHOWERS AND SMALL PATCHES OF RAIN CONTINUED IN SOUTHEAST TEXAS BETWEEN HOUSTON AND BEAUMONT AND OVER GALVESTON BAY.
Special weather statement, May 12, 4:45 AM CDT, 2 hours 30 minutes before
LAZ005-006-007-008-011-012-121045- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE LAKE CHARLES LA 435 AM CDT SAT MAY 12 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 1000 AM CDT THAT INCLUDES VERNON PARISH IN SOUTHWEST LOUISIANA AND GRANT...LA SALLE ...AND RAPIDES PARISHES IN CENTRAL LOUISIANA... AT 430 AM SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED OVER SOUTHEAST TEXAS AND WEST CENTRAL LOUISIANA. THEEY WERE GENEaRALLY WEST OF A WINNFIELD LOUISIANA...BEAUMONT TEXAS LINE. MOVEMENT WAS EAST AT 40 MILES AN HOUR.
Special weather statement, May 12, 5:45 AM CDT, 1 hour 30 minutes before
LAZ005-006-007-008-011-012-121145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE LAKE CHARLES LA 545 AM CDT SAT MAY 12 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 1000 AM CDT THAT INCLUDES VERNON PARISH IN SOUTHWEST LOUISIANA AND GRANT...LA SALLE ...AND RAPIDES PARISHES IN CENTRAL LOUISIANA... AT 530 AM SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...CONTINUED ACROSS CENTRAL LOUISIANA AND SOUTHEAST TEXAS. THEY WERE GENERALLY WEST OF AN ALEXANDRIA TO BEAUMONT LINE. THE HEAVIEST RAIN WAS ABOUT 10 MILES NORTH OF ALEXANDRIA AND JUST EAST OF MANY. MOVEMENT WAS EAST AT 40 MILES AN HOUR.
Special weather statement, May 12, 6:40 AM CDT, 35 minutes before
LAZ005-006-007-008-011-012-121245- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE LAKE CHARLES LA 640 AM CDT SAT MAY 12 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 1000 AM CDT THAT INCLUDES VERNON PARISH IN SOUTHWEST LOUISIANA AND GRANT...LA SALLE ...AND RAPIDES PARISHES IN CENTRAL LOUISIANA... AT 630 AM SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...CONTINUED ACROSS CENTRAL LOUISIANA AND SOUTHEAST TEXAS. THEY WERE GENERALLY WEST OF AN ALEXANDRIA TO PORT ARTHUR LINE. THE HEAVIEST RAIN WAS ABOUT 15 MILES NORTHWEST OF ALEXANDRIA. MOVEMENT WAS EAST AT 40 MILES AN HOUR.
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 6:19 AM CDT | Severe Thunderstorm Warning | LCH | Nacogdoches | 56 min |
| May 12, 7:38 AM CDT | Severe Thunderstorm Warning | LCH | Angelina, Nacogdoches | 52 min |
| May 12, 8:06 AM CDT | Tornado Warning | LCH | Sabine, San Augustine | 69 min |
| May 12, 6:31 PM CDT | Severe Thunderstorm Warning | LCH | Nacogdoches | 44 min |
Nearby
Severe Thunderstorm Warnings in Texas, 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.