Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 68, NWS Houston/Galveston, TX

April 27, 1997San Jacinto County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 27, 1997, 1:03 AM CDT for San Jacinto County, Texas. It was in force for 57 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, 1997, 1:03 AM CDT (06:03 UTC)
Expired: Apr 27, 1997, 2:00 AM CDT
In force: 57 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 06:06 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.

What was reported inside it

Time	Report	Where	Remark
Apr 27, 1:20 AM CDT	Hail 1.5	Pointblank, 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 27, 12:15 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.1 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.

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: 73 J/kg
Mixed-layer CIN: -281 J/kg
Mixed-layer LCL: 600 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 26, 7:53 PM CDT, 5 hours 10 minutes earlier.

Area forecast discussion, Apr 26, 7:53 PM CDT, 5 hours 10 minutes before

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In the hours before

Special weather statement, Apr 27, 12:15 AM CDT, 48 minutes before

TXZ211-237-210-227-198-213-163-200-511-236-199-179-178-164-177-
212-197-226-196-195-214-238-235-176-271115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1217 AM CDT SUN APR 27 1997

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR
ALL OF SOUTHEAST TEXAS UNTIL 600 AM THIS SUNDAY MORNING. THIS WATCH
INCLUDES AUSTIN...BRAZORIA...BRAZOSCHAMBERS...COLOTADO...FORT BEND...
GALVESTON...GRIMES...HARRIS...HOUSTON...MONTGOMERY...POLK...SAN JACINTO.
TRINITY...WALKER...WALLER...WASTHIGTON...WHARTON...JACKSON...
MATAGORDA COUNTIES.

A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN
AND NEAR THE WATCH AREA.

Special weather statement, Apr 27, 12:17 AM CDT, 46 minutes before

TXZ211-237-210-227-198-213-163-200-511-236-199-179-178-164-177-
212-197-226-196-195-214-238-235-176-271115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1217 AM CDT SUN APR 27 1997

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR
ALL OF SOUTHEAST TEXAS UNTIL 600 AM THIS SUNDAY MORNING. THIS WATCH
INCLUDES AUSTIN...BRAZORIA...BRAZOSCHAMBERS...COLOTADO...FORT BEND...
GALVESTON...GRIMES...HARRIS...HOUSTON...MONTGOMERY...POLK...SAN JACINTO.
TRINITY...WALKER...WALLER...WASTHIGTON...WHARTON...JACKSON...
MATAGORDA COUNTIES.

A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN
AND NEAR THE WATCH AREA.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 11:03 PM CDT	Severe Thunderstorm Warning	HGX	Austin, Colorado	57 min
Apr 26, 11:31 PM CDT	Severe Thunderstorm Warning	HGX	Washington	59 min
Apr 26, 11:52 PM CDT	Severe Thunderstorm Warning	HGX	Waller	38 min
Apr 27, 12:02 AM CDT	Severe Thunderstorm Warning	HGX	Grimes, Montgomery	58 min
Apr 27, 12:45 AM CDT	Severe Thunderstorm Warning	HGX	Walker	60 min
Apr 27, 1:20 AM CDT	Severe Thunderstorm Warning	HGX	Polk	55 min
Apr 27, 2:00 AM CDT	Severe Thunderstorm Warning	HGX	Trinity	45 min
Apr 27, 3:50 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria	25 min
Apr 27, 4:09 AM CDT	Severe Thunderstorm Warning	HGX	Galveston	66 min
Apr 27, 4:21 AM CDT	Severe Thunderstorm Warning	HGX	Harris	54 min
Apr 27, 5:06 AM CDT	Severe Thunderstorm Warning	HGX	Liberty	69 min
Apr 27, 5:37 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria	53 min
Apr 27, 8:16 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria	64 min
Apr 27, 8:49 AM CDT	Severe Thunderstorm Warning	HGX	Harris	56 min
Apr 27, 9:17 AM CDT	Severe Thunderstorm Warning	HGX	Harris, Liberty	58 min

Nearby

Severe Thunderstorm Warnings in Texas, 1997 Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.