Alert archive / Texas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 21, NWS Houston/Galveston, TX

May 17, 1986Chambers County, Galveston County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 17, 1986, 5:10 PM CDT for Chambers County, Galveston County, Texas. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
May 17, 1986, 5:10 PM CDT (22:10 UTC)
Expired
May 17, 1986, 6:10 PM CDT
In force
60 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

Counties Chambers County, TX, Galveston 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, 10.2 hours before the alert went out and 164 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 1986-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 989 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 1986-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
989 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
616 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.6

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, May 17, 12:45 PM CDT, 4 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
1245 PM CDT SAT MAY 17 1986

...A TORNADO WATCH IS IN EFFECT FOR A LARGE PORTION OF SOUTHEAST AND
EAST TEXAS UNTIL 700 PM CDT...

THE WATCH AREA INCLUDES THE HOUSTON METROPOLITAN AREA AND COUNTIES
NORTH OF HARRIS COUNTY.

AT 1245 PM CDT AN AREA OF THUNDERSTORMS WERE MOVING INTO GRIMES..
WALKER AND HOUSTON COUNTIES.  THE STRONGEST THUNDERSTORMS WERE FROM
NEAR COLLGEE STATION TO NORTH OF CROCKETT.  THE THUNDERSTORMS WERE
MOVING EAST SOUTHEAST AT 20 MPH.

THESE THUNDERSTORMS COULD PRODUCE STRONG GUSTY WINDS SOME HAIL AND
DANGEROUS LIGHTNING STRIKES AS THE MOVE THROUGH THE AREA.

CONDITONS ARE FAVORABLE FOR THE RAPID DEVELOPMENT OF SEVERE WEATHER
OR THE FORMATION OF TORNADOS..PERSONS IN THIS AREA ARE URGED TO STAY
TUNED TO LOCAL MEDIA FOR FURTHER STATEMENTS OR WARNINGS.
Special weather statement, May 17, 1:46 PM CDT, 3 hours 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
145 PM CDT SAT MAY 17 1986

...A TORNADO WATCH IS IN EFFECT FOR A LARGE PORTION OF SOUTHEAST AND
EAST TEXAS UNTIL 700 PM CDT...

THE WATCH AREA INCLUDES THE HOUSTON METROPOLITAN AREA AND COUNTIES
NORTH OF HARRIS COUNTY.

AT 145 PM CDT AN AREA OF HEAVY THUNDERSTORMS WERE IN WASHINGTOM..
GRIMES..WALKER AND TRINITY COUNTIES.  THE STRONGEST THUNDERSTORMS
WERE IN A BAND FROM BRENHAM THROUGH HUNTSVILLE TO THE NORTHERN END
OF LAKE LIVINGSTON TO NORTH OF GROVETON.  THE THUNDERSTORMS WERE
MOVING EAST SOUTHEAST AT 25 MPH.

THESE THUNDERSTORMS COULD PRODUCE STRONG GUSTY WINDS SOME HAIL AND
DANGEROUS LIGHTNING STRIKES AS THE MOVE THROUGH THE AREA.

CONDITIONS REMAIN FAVORABLE FOR THE RAPID DEVELOPMENT OF SEVERE WEATHER
OR THE FORMATION OF TORNADOS.

PERSONS IN THIS AREA SHOULD REMAIN ALERT FOR APPROCHING THREATING
WEATHER AND CONTINUE TO MONITOR YOUR WEATHER RADIO OR LOCAL RADIO
O`R T.V. STATIONS FOR FURTHER STATEMENTS OR WARNINGS ISSUED AS NEEDED.
Special weather statement, May 17, 2:30 PM CDT, 2 hours 40 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
230 PM CDT SAT MAY 17 1986

...A TORNADO WATCH IS IN EFFECT FOR A LARGE PORTION OF SOUTHEAST AND
EAST TEXAS UNTIL 700 PM CDT...

THE WATCH AREA INCLUDES THE HOUSTON METROPOLITAN AREA AND COUNTIES
NORTH OF HARRIS COUNTY.

AT 230 PM CDT AN AREA OF HEAVY THUNDERSTORMS WERE IN GRIMES..WASHINGTON..
TRINITY..SAN JACINTO AND MONTGOMERY COUNTIES.  THE STRONGEST THUNDERSTORMS
WERE FROM ROANS PRARIE THROUGH HUNTSVILLE TO LAKE LIVINGSTON.  THE
LEADING EDGE OF THE THUNDERSTORMS WERE IN NORTHERN MONTGOMERY COUNTY
AND SHOULD BE MOVING INTO THE HOUSTON AREA WITHIN THE NEXT HOUR.
THE THUNDERSTORMS WERE MOVING EAST SOUTHEAST AT 25 MPH.

BOATERS AND CAMPERS IN THE LAKE LIVINGSTON AND LAKE CONROE AREA SHOULD
MOVE TO A SHELTERED AREA UNTIL THESE THUNDERSTORMS MOVE OUT OF THE AREA.

THESE THUNDERSTORMS COULD PRODUCE STRONG GUSTY WINDS..SMALL HAIL AND
DANGEROUS LIGHTING STRIKES AS THEY MOVE THROUGH THE AREA.

CONDITIONS REMAIN FAVORABLE FOR THE RAPID DEVELOPMENT OF SEVERE
THUNDERSTORMS OR FROMATION OF TORNADOS.  PERSONS ARE URGED TO
REMAIN ALERT AND SEEK SHELTER IF THREATING WEATHER IS SIGHTED OR
A WARNING IS ISSUED.
Special weather statement, May 17, 3:15 PM CDT, 1 hour 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
315 PM CDT SAT MAY 17 1986

...A TORNADO WATCH IS IN EFFECT FOR A LARGE PORTION OF SOUTHEAST
TEXAS UNTIL 1000 PM CDT...

THE WATCH AREA INCLUDES THE HOUSTON METROPOLITAN AREA AND COUNTIES
NORTH OF HARRIS COUNTY.

AT 315 PM CDT HEAVY THUNDERSTORMS WERE IN HARRIS..MONTGORMERY..POLK
AND SAN JACINTO COUNTIES.  THE STRONGEST THUNDERSTORMS WERE FROM NEAR
KATY THROUGH CONROE THROUGH LAKE LIVINGSTON TO CAMP RUBY.  THE
THUNDERSTORMS WERE MOVING EAST SOUTHEAST AT 25 MPH.

BOATERS AND CAMPERS IN THE LAKE LIVINGSTON AND LAKE CONROE AREA SHOULD
MOVE TO A SHELTERED AREA UNTIL THESE THUNDERSTORMS MOVE OUT OF THE AREA.

THESE THUNDERSTORMS COULD PRODUCE STRONG GUSTY WINDS OF 50 MPH OR HIGHER
SMALL HAIL AND DANGEROUS LIGHTNING STRIKES AS THEY MOVE THROUGH THE
AREA.

CONDITIONS REMAIN FAVORABLE FOR THE RAPID DEVELOPMENT OF SEVERE
THUNDERSTORMS OR FORMATION OF TORNADOS.  PERSONS ARE URGED TO
REMAIN ALERT AND SEEK SHELTER IF THREATING WEATHER IS SIGHTED OR
A WARNING IS ISSUED.
Special weather statement, May 17, 3:30 PM CDT, 1 hour 40 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTION
NATIONAL WEATHER SERVICE GALVESTON TX
330 PM CDT SAT MAY 17 1986

 ...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM CDT FOR ALL OF SOUTHEAST
TEXAS INCLUDING GALVESTON AND CHAMBERS COUNTIES.

AT 330 PM CDT A LINE OF VERY HEAVY THUNDERSTORMS STRETCHED FROM THE
SAM RAYBURN RESERVOIR...SOUTHWEST TO JUST NORTH OF HOUSTON...ACROSS
TOMBALL TO WEST OF
LA GRANGE.

THIS LINE WAS MOVING SOUTHEAST AT 25 MILES AN HOUR.

ALONG THE LEADING EDGE OF THIS LINE OF THUNDERSTORMS VERY STORNG
GUSTING WINDS ARE OCCURRING...REPORTS OF GUSTS UP TO 75 MILES AN HOUR
HAVE BEEN RECIEVED.

PERSONS SOUTH OF THE THUNDERSTORM LINE SHOULD TAKE APPROPRIATE ACTION.

THE HEAVIEST THUNDERSTORMS WERE OCCURRING NEAR STEINHAGEN LAKE...AND
SOUTHWEST OF LA GRANGE NEAR FLATONIA.

STAY TUNED TO LOCAL TV...RADIO...OR NOAA WEATHER RADIO FOR THE LATEST
INFORMATION OR POSSIBLE WARNINGS.
Special weather statement, May 17, 4:40 PM CDT, 30 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE GALVESTON TX
440 PM CDT SAT MAY 17 1986

 ...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM CDT FOR ALL OF SOUTHEAST
TEXAS INCLUDING GALVESTON AND CHAMBERS COUNTIES.

AT 330 PM CDT A LINE OF VERY HEAVY THUNDERSTORMS STRETCHED FROM JUST
SOUTH OF HALLETTSVILLE THROUGH EAGLE LAKE TO JUST NORTH OF GALVESTON
AND ON THROUGH SOURLAKE TO JUST SOUTH OF TOLEDO BEND RESERVOIR.

THIS LINE WAS MOVING SOUTHEAST AT 25 MILES AN HOUR.

ALONG THE LEADING EDGE OF THIS LINE OF THUNDERSTORMS VERY STRONG
GUSTING WINDS ARE OCCURRING...REPORTS OF GUSTS UP TO 75 MILES AN HOUR
HAVE BEEN RECIEVED.

PERSONS SOUTH OF THE THUNDERSTORM LINE mSHOULD TAKE APPROPRIATE ACTION.

WIDESPREAD RAIN WAS OCCURRING OVER THE REMAINDER OF SOUTHEAST TEXAS.

STAY TUNED TO LOCAL TV...RADIO...OR NOAA WEATHER RADIO FOR THE LATEST
INFORMATION OR POSSIBLE WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 3:48 PM CDTSevere Thunderstorm WarningHGXLiberty57 min
May 17, 3:51 PM CDTTornado WarningHGXFort Bend69 min
May 17, 3:57 PM CDTSevere Thunderstorm WarningHGXHarris63 min
May 17, 4:10 PM CDTSevere Thunderstorm WarningHGXAustin, Colorado, Wharton65 min
May 17, 4:10 PM CDTSevere Thunderstorm WarningHGXWaller65 min
May 17, 4:10 PM CDTSevere Thunderstorm WarningHGXBrazoria65 min
May 17, 4:10 PM CDTSevere Thunderstorm WarningHGXChambers, Galveston60 min
May 17, 4:57 PM CDTTornado WarningHGXFort Bend63 min
May 17, 5:20 PM CDTTornado WarningHGXBrazoria55 min
May 17, 5:59 PM CDTTornado WarningHGXMatagorda61 min
May 17, 6:09 PM CDTSevere Thunderstorm WarningHGXBrazoria66 min
May 17, 6:10 PM CDTSevere Thunderstorm WarningHGXChambers, Galveston2 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1986Every severe thunderstorm warning in 1986

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.