Alert archive / Texas / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 31, NWS Houston/Galveston, TX

April 27, 1990Trinity County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 27, 1990, 7:31 PM CDT for Trinity County, Texas. It was in force for 59 min. 1 report 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: Apr 27, 1990, 7:31 PM CDT (00:31 UTC)
Expired: Apr 27, 1990, 8:30 PM CDT
In force: 59 min
Issued by: NWS Houston/Galveston, TX
Area: Whole counties

County Trinity 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
Apr 27, 8:00 PM CDT	Thunderstorm Wind 0	Trinity, 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

Longview/Gregg, TX (KGGG), launched 00:00Z, 0.5 hours before the alert went out and 149 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1368 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1155 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

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, Apr 27, 4:37 PM CDT, 2 hours 54 minutes before

TXZ032-046-045-272345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
437 PM CDT FRI APR 27 1990

...A TORNADO WATCH IS IN EFFECT FOR NORTHEAST TEXAS AND A PART OF
SOUTHEAST TEXAS INCLUDING HOUSTON...TRINITY...POLK...AND WAKLER
COUNTIES UNTIL 1000 PM CDT THIS EVENING...

ALTHOUGH NO THUNDERSTORMS WERE INDICATED IN THESE COUNTIES AT THIS
TIME...CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE WEATHER
AND TORNADOES IN AND CLOSE TO THE WATCH AREA.

AT 430 PM CDT RADAR INDICATED SCATTERED THUNDERSTORMS NORTH AND NORTHE
OF THE WACO AREA AND MOVING TO THE SOUTHEAST AT 35 MILES AND HOUR.
THESE COULD BEGIN TO EFFECT HOUSTON COUNTY WITH IN THE NEXT TWO HOURS.

Special weather statement, Apr 27, 5:54 PM CDT, 1 hour 37 minutes before

TXZ047-049-037-032-046-045-280045-

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
544 PM CDT FRI APR 27 1990

A TORNADO WATCH HAS BEEN ISSUED FOR ALL OF SOUTHEAST TEXAS FROM 6 PM CDT
UNTIL MIDNIGHT. THIS WATCH INCLUDES THE HOUSTON/GALVESTON
METROPOLITAN AREAS.

NO SEVERE THUNDERSTORMS ARE CURRENTLY IN SOUTHEAST TEXAS BUT
THUNDERSTORMS ARE RAPIDLY DEVELOPING FROM A LINE JUST EAST OF COLLEGE
TO EAST OF WACO.

THESE THUNDERSTORMS ARE MOVING SOUTHEAST AT 35 MILES AN HOUR AND WILL
BE EFFECTING HOUSTON, WALKER, AND GRIMES COUNTIES WITHIN THE NEXT
HOUR.

Special weather statement, Apr 27, 7:06 PM CDT, 25 minutes before

TXZ047-032-037-045>047-049-281000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
700 PM CDT FRI APR 27 1990

...A TORNADO WATCH IS IN EFFECT FOR ALL OF SOUTHEAST TEXAS FROM 6 PM CDT
UNTIL MIDNIGHT.  THIS WATCH INCLUDES THE HOUSTON/GALVESTON
METROPOLITAN AREAS....

...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR HOUSTON COUNTY UNTIL
715 PM...AND FOR GRIMES COUNTY UNTIL 730 PM...

RADAR SHOWS A LINE OF STRONG THUNDERSTORMS MOVING INTO THE ABOVE TWO
COUNTIES FROM THE NORTHWEST...MOVING SOUTHEAST AT 25 MPH.  THERE HAVE
BEEN REPORTS OF TORNADOES ON THE GROUND IN BRAZOS COUNTY DURING THE PAST
15 MINUTES...NEAR OR SLIGHTLY EAST OF BRYAN AND COLLEGE STATION.

RESIDENTS IN THE WARNED COUNTIES SHOULD BE ALERT FOR POSSIBLE SEVERE
THUNDERSTORMS APPROACHING FROM THE NORTHWEST AND BE READY TO TAKE SHELTER
IF SEVERE WEATHER IS SIGHTED.

.
RESIDENTS IN COUNTIES ADJACENT TO HOUSTON AND GRIMES COUNTIES SHOULD
BE ALERT...SINCBE ADDITIONAL WARNINGS MAY BE ISSUED OVER THE NEXT FEW HOURS AS
THE LINE OF STORMS MOVES DEEPER INTO SOUTHEAST TEXAS.

STAY TUNED TO YOUR WEATHER RADIO...LOCAL RADIO AND TV...FOR THE LATEST
UPDATES.

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 27, 7:04 PM CDT	Severe Thunderstorm Warning	HGX	Walker	56 min
Apr 27, 7:18 PM CDT	Severe Thunderstorm Warning	HGX	Houston	42 min
Apr 27, 7:34 PM CDT	Tornado Warning	HGX	Grimes	56 min
Apr 27, 8:24 PM CDT	Severe Thunderstorm Warning	HGX	Harris	66 min
Apr 27, 9:21 PM CDT	Severe Thunderstorm Warning	HGX	Liberty	69 min
Apr 27, 9:30 PM CDT	Severe Thunderstorm Warning	HGX	Harris	45 min
Apr 27, 9:48 PM CDT	Severe Thunderstorm Warning	HGX	Fort Bend	57 min
Apr 27, 9:59 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria	61 min
Apr 27, 10:00 PM CDT	Severe Thunderstorm Warning	HGX	Galveston	60 min
Apr 27, 10:28 PM CDT	Severe Thunderstorm Warning	HGX	Galveston	2 hr
Apr 27, 11:00 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria	22 min

Nearby

Severe Thunderstorm Warnings in Texas, 1990 Every 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.