Alert archive / Texas / Tornado Warnings in 1999
Tornado Warning 13, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Jan 1, 1999, 9:50 PM CST for San Jacinto County, Texas. It was in force for 65 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
- Jan 1, 1999, 9:50 PM CST (03:50 UTC)
- Expired
- Jan 1, 1999, 10:55 PM CST
- In force
- 65 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County San Jacinto County, TX
The radar
The Houston radar (KHGX), 124 km from the middle of the area, began a volume at 03:50 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 4:30 PM CST | Tornado Watch | SPC | 6 hr |
| Jan 1, 7:30 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.8 hours before the alert went out and 196 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
- 437 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 704 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 202 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS1 KHOU 020349 RRA TORHOU TXC407-020455- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 950 PM CST FRI JAN 1 1999 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A * TORNADO WARNING FOR... SAN JACINTO COUNTY IN SOUTHEASTERN TEXAS * UNTIL 1055 PM CST * AT 950 PM...RADAR INDICATED A TORNADIC THUNDERSTORM 5 MILES WEST OF SPLENDORA MOVING NORTHEAST AT 25 MPH. * THIS STORM WILL TRAVEL THROUGH THE NATIONAL FOREST AND ACROSS FM 1726 SOUTH OF EVERGREEN. IF YOU ARE IN THESE AREAS... SEEK SAFETY IN A SMALL INTERIOR ROOM AWAY FROM WINDOWS.
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Houston/Galveston, TX wrote its last area forecast discussion before this tornado warning went out at Jan 1, 7:30 PM CST, 2 hours 20 minutes earlier.
Area forecast discussion, Jan 1, 7:30 PM CST, 2 hours 20 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
730 PM CST FRI JAN 1 1999
NEW TORNADO WATCH HAS BEEN ISSUED BY SPC FOR ALL OF SE TX UNTIL 100
AM. DEVELOPING SQUALL LINE TO OUR WEST IS MAKING PROGRESS THIS WAY...
AND IT LOOKS TO BE A BUSY EVENING/NIGHT. PARAMETERS COMING TOGETHER
FOR A COMBINED SEVERE THUNDERSTORM AND FLASH FLOOD EVENT.
WHEN THE STORMS COME TO AN END TOMORROW...WELL BE DEALING WITH OUR
NEXT COLD WAVE AS STRONG NORTH AND NORTHWEST SURFACE WINDS BEHIND THIS
EMERGING BIG EASTERN U.S. STORM BRING COLDER AIR THIS WAY.
.HGX...TORNADO WATCH (WW2) IN EFFECT UNTIL 1 AM.
FLASH FLOOD WATCH TONIGHT.
SCA TONIGHT AND SAT.
PRELIMS...
CLL BU 050/052 028/048 025 910
IAH BU 062/063 030/050 027 920
GLS BU 066/066 041/050 035 920
42/44/31/45/32/47/36In the hours before
Special weather statement, Jan 1, 4:32 PM CST, 5 hours 18 minutes before
TXZ163-164-176>179-198>200-020420- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 432 PM CST FRI JAN 1 1999 A TORNADO WATCH WILL BE IN EFFECT UNTIL 10 PM ALONG AND NORTH OF A LINE FROM LIBERTY TO CONROE TO CALDWELL. THIS TORNADO WATCH WILL INCLUDE THE FOLLOWING COUNTIES... LIBERTY... MONTGOMERY... GRIMES... BURLESON... BRAZOS... WALKER... SAN JACINTO... POLK... TRINITY... HOUSTON... MADISON... . THE MAJOR CITIES OF CONROE... NAVASOTA... HUNTSVILLE... GROVETON... LIVINGSTON... CALDWELL AND BRYAN/COLLEGE STATION. CONDITIONS WILL CONTINUE TO BE FAVORABLE FOR THE RAPID DEVELOPMENT OF THUNDERSTORMS THIS AFTERNOON AND EVENING AS GULF MOISTURE SURGES NORTH THROUGH THE WATCH AREA. A VIGOROUS UPPER LEVEL DISTURBANCE WILL SWEEP OVER THE AREA ENHANCING THE DEVELOPMENT OF THUNDERSTORMS. TORNADOES...STRONG DAMAGING WINDS...AND LARGE HAIL WILL ALL BE POSSIBLE WITH THE THUNDERSTORMS THAT DEVELOP. IN ADDITION A PACIFIC COLD FRONT WILL LIKELY ENCOURAGE DEVELOPMENT OF A SQUALL LINE MOVING OUT OF THE HILL COUNTRY THIS EVENING. ALTHOUGH STRONG DAMAGING WINDS MAY ACCOMPANY THE SQUALL LINE THE POSSIBILITY OF ISOLATED TORNADOES WILL EXIST THROUGHOUT THE EVENING. REMEMBER...A WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF TORNADOES...AND THAT WARNINGS MEAN THAT TORNADOES ARE IMMINENT OR OCCURING. IF A WARNING IS ISSUED SEEK SHELTER IMMEDIATELY. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL NEWS SOURCES FOR THE LATEST UPDATES. RELAY ANY SEVERE WEATHER REPORTS TO YOUR LOCAL SHERIFFS OFFICE FOR RELAY TO THE NATIONAL WEATHER SERVICE.
Special weather statement, Jan 1, 4:52 PM CST, 4 hours 58 minutes before
GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-227- 235>238-021300- SEVERE WEATHER AND HEAVY RAINFALL OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 452 PM CST FRI JAN 1 1999 ...ALL OF SOUTHEAST TEXAS REMAINS IN A SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS EVENING AND TONIGHT... ...FLASH FLOOD WATCH IN EFFECT TONIGHT FOR ALL OF SOUTHEAST TEXAS... A STRONG COLD FRONT WILL APPROACH SOUTHEAST TEXAS TONIGHT. AHEAD OF THE FRONT...WARM AND UNSTABLE AIR WILL CONTINUE TO INCREASE AND PRODUCE NUMEROUS SHOWERS AND THUNDERSTORMS. SOME OF THESE THUNDERSTORMS WILL HAVE THE POTENTIAL TO BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS. A FEW TORNADOES ARE ALSO POSSIBLE WITH THE MOST INTENSE THUNDERSTORMS. A SQUALL LINE OF STRONG TO SEVERE THUNDERSTORMS IS EXPECTED TO FORM OVER SOUTH CENTRAL TEXAS THIS EVENING AND MOVE EASTWARD ACROSS SOUTHEAST TEXAS. SINCE THIS SQUALL LINE WILL MOVE INTO THE AREA FROM THE WEST...ALL OF SOUTHEAST TEXAS HAS THE POTENTIAL FOR SEVERE THUNDERSTORMS. IN ADDITION TO THE SEVERE WEATHER THREAT...HEAVY RAINS ARE ALSO POSSIBLE ACROSS SOUTHEAST TEXAS AND A FLASH FLOOD WATCH REMAINS IN EFFECT. RAINFALL AMOUNTS WILL AVERAGE AROUND 2 INCHES WITH ISOLATED AMOUNTS UP TO 5 INCHES POSSIBLE. THESE RAINFALL AMOUNTS WILL INCREASE THE THREAT OF FLASH FLOODING AS WELL AS URBAN FLOODING. PEOPLE ALONG CREEKS...STREAMS AND RIVERS SHOULD MONITOR WATER LEVELS AND BE PREPARED TO TAKE ACTION SHOULD RIVER LEVELS BEGIN TO RISE. SPOTTER GROUPS AS WELL AS EMERGENCY MANAGERS ARE ENCOURAGED TO PREPARE FOR THE POSSIBILITY OF SEVERE WEATHER AND FLASH FLOODING. THIS IS A DEVELOPING WEATHER SITUATION. STAY TUNED TO NOAA WEATHER OR RELIABLE WEATHER NEWS SOURCES FOR LATER STATEMENTS AND POSSIBLE ISSUANCE OF SEVERE WEATHER WATCHES AND WARNINGS. SEVERE THUNDERSTORM OR TORNADO WATCHES WILL LIKELY BE ISSUED FOR PORTIONS OF SOUTHEAST TEXAS LATER THIS EVENING AND DURING THE OVERNIGHT HOURS. WEATHER INFORMATION IS ALSO AVAILABLE ON THE WORLD WIDE WEB AT WWW.NWS.NOAA.GOV/HGX.
Special weather statement, Jan 1, 6:53 PM CST, 2 hours 57 minutes before
GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214- 226-227-235>238-020155- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 653 PM CST FRI JAN 1 1999 ...TORNADO WATCH REMAINS IN EFFECT FOR THE NORTHERN PORTIONS OF SOUTHEAST TEXAS UNTIL 1000 PM CDT... AT 650 PM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG TO SEVERE THUNDERSTORMS EXTENDED ALONG THE I-35 CORRIDOR FROM JUST EAST OF AUSTIN SOUTH TO SAN ANTONIO. THE LINE WAS MOVING NORTHEAST AT 25 MPH AND WILL APPROACH THE EASTERN PORTIONS OF SOUTHEAST TEXAS AFTER 715 PM. DAMAGING WINDS...FREQUENT LIGHTNING AND LARGE WILL BE POSSIBLE AS THIS LINE MOVES THROUGH THE AREA. THERE IS ALSO A THREAT OF TORNADOES AND A THREAT OF FLASH FLOODING. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF SOUTHEAST TONIGHT. PEOPLE ACROSS SOUTHEAST TEXAS SHOULD CONTINUE TO MONITOR THE LATEST WEATHER INFORMATION. STAY TUNED TO NOAA WEATHER RADIO...TV...OR YOUR LOCAL NEW SOURCE FOR LATER STATEMENTS AND ADDITIONAL WATCHES AND WARNINGS.
Special weather statement, Jan 1, 7:20 PM CST, 2 hours 30 minutes before
GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-227- 235>238-020700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 720 PM CST FRI JAN 1 1999 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR ALL OF SOUTHEAST TEXAS UNTIL 1 AM SATURDAY MORNING. COUNTIES INCLUDED IN THE WATCH AREA ARE: AUSTIN...BRAZORIA...BRAZOS...BURLESON... CHAMBERS...COLORADO...FORT BEND...GALVESTON...GRIMES...HARRIS... HOUSTON...JACKSON...LIBERTY...MADISON...MATAGORDA...MONTGOMERY... POLK...SAN JACINTO...TRINITY...WALKER...WALLER...WASHINGTON... WHARTON...AND THE ADJACENT COASTAL WATERS. A SQUALL LINE HAS DEVELOPED IN CENTRAL TEXAS THIS EVENING AS A STRONG UPPER LEVEL DISTURBANCE COLLIDES INTO WARM MOIST AIR. UPPER LEVEL WINDS WILL BE SUPPORTIVE FOR TORNADO FORMATION AHEAD OF... AND ALONG...THE LINE. TORNADOES HAVE BEEN VERIFIED EARLIER THIS AFTERNOON. THE SQUALL LINE WILL MOVE WEST TO EAST ACROSS THE AREA BRINGING A THREAT OF STRONG DAMAGING WINDS AND LARGE HAIL IN ADDITION TO TORNADOES. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE WEATHER AND TORNADOES IN AND NEAR THE WATCH AREA. PERSONS IN THOSE AREAS SHOULD BE PREPARED TO TAKE SHELTER SHOULD A WARNING BE ISSUED. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL TELEVISION OR RADIO STATIONS...OR YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS CONCERNING THIS POTENTIALLY DANGEROUS SEVERE WEATHER THREAT.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 7:05 PM CST | Tornado Warning | HGX | Burleson | 55 min |
| Jan 1, 7:41 PM CST | Severe Thunderstorm Warning | HGX | Houston | 59 min |
| Jan 1, 7:51 PM CST | Tornado Warning | HGX | Brazos | 59 min |
| Jan 1, 8:37 PM CST | Severe Thunderstorm Warning | HGX | Madison | 48 min |
| Jan 1, 8:48 PM CST | Tornado Warning | HGX | Harris | 42 min |
| Jan 1, 9:01 PM CST | Tornado Warning | HGX | Colorado | 44 min |
| Jan 1, 9:12 PM CST | Severe Thunderstorm Warning | HGX | Grimes, Washington | 63 min |
| Jan 1, 9:15 PM CST | Severe Thunderstorm Warning | HGX | Houston | 65 min |
| Jan 1, 9:35 PM CST | Tornado Warning | HGX | Montgomery | 65 min |
| Jan 1, 9:47 PM CST | Tornado Warning | HGX | Harris | 63 min |
| Jan 1, 9:55 PM CST | Tornado Warning | HGX | Liberty | 60 min |
| Jan 1, 10:10 PM CST | Severe Thunderstorm Warning | HGX | Walker | 65 min |
| Jan 1, 10:34 PM CST | Tornado Warning | HGX | Polk | 61 min |
| Jan 1, 10:41 PM CST | Tornado Warning | HGX | Montgomery | 64 min |
| Jan 1, 10:46 PM CST | Tornado Warning | HGX | Harris | 64 min |
| Jan 1, 10:47 PM CST | Tornado Warning | HGX | Liberty | 28 min |
| Jan 1, 10:47 PM CST | Tornado Warning | HGX | Liberty | 58 min |
| Jan 1, 11:25 PM CST | Tornado Warning | HGX | Chambers, Galveston | 90 min |
| Jan 1, 11:25 PM CST | Tornado Warning | HGX | Chambers | 65 min |
| Jan 1, 11:49 PM CST | Severe Thunderstorm Warning | HGX | Harris | 61 min |
| Jan 1, 11:50 PM CST | Severe Thunderstorm Warning | HGX | Chambers, Galveston | 65 min |
| Jan 1, 11:54 PM CST | Severe Thunderstorm Warning | HGX | Liberty | 61 min |
Nearby
Tornado Warnings in Texas, 1999Every tornado warning in 1999Tornadoes in 1999
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.