Alert archive / Texas / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 9, NWS Amarillo, TX

May 25, 1987Swisher County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 25, 1987, 8:23 PM CDT for Swisher County, Texas. It was in force for 67 min.

The area

The counties it named.

The facts

Issued: May 25, 1987, 8:23 PM CDT (01:23 UTC)
Expired: May 25, 1987, 9:30 PM CDT
In force: 67 min
Issued by: NWS Amarillo, TX
Area: Whole counties

County Swisher 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.4 hours before the alert went out and 78 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: 962 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1465 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.5

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 25, 5:39 PM CDT, 2 hours 44 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
535PM CDT MON MAY 25 1987

AT 532 PM CDT...THUNDERSTORMS WITH VERY HEAVY RAIN REMAINED IN THE
NORTHCENTRAL TEXAS PANHANDLE...FROM JUST NORTH OF STINETT TO 5 MILES
SOUTHWEST OF PERYTON. THESE STORMS WERE MOVING TO THE NORTHEAST AROUND
20 MPH.  AT 510PM AMARILLO RADAR INDICATED A TORNADO ASSOCIATED WITH THIS
THUNDERSTORM.

LARGE HAIL...STRONG AND GUSTY WINDS...FREQUENT LIGHTNING...AND VERY HEAVY
RAINFALL MAY ACCOMPANY THESE STORMS.

PERSONS IN THE VICINITY OF THESE STORMS SHOULD REMAIN ALERT FOR POSSIBLE
ASSOCIATED SEVERE WEATHER...AND BE PREPARED TO MOVE TO A PLACE OF SAFETY.

STAY TUNED TO YOUR LOCAL TELEVISION' OR RADIO STAIONS FOR FURTHER UPDATES.

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 7:00 PM CDT	Tornado Warning	AMA	Castro, Swisher	60 min
May 25, 7:03 PM CDT	Severe Thunderstorm Warning	AMA	Randall	57 min
May 25, 7:32 PM CDT	Tornado Warning	AMA	Armstrong	58 min
May 25, 7:44 PM CDT	Tornado Warning	AMA	Hansford	61 min
May 25, 7:47 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	58 min
May 25, 7:52 PM CDT	Tornado Warning	AMA	Randall	68 min
May 25, 8:40 PM CDT	Tornado Warning	AMA	Ochiltree	65 min
May 25, 8:50 PM CDT	Tornado Warning	AMA	Hansford	55 min
May 25, 9:01 PM CDT	Severe Thunderstorm Warning	AMA	Randall	59 min
May 25, 9:45 PM CDT	Tornado Warning	AMA	Randall	60 min
May 25, 10:15 PM CDT	Tornado Warning	AMA	Armstrong	60 min
May 25, 10:36 PM CDT	Tornado Warning	AMA	Potter	54 min
May 26, 12:06 PM CDT	Flash Flood Warning	AMA	Randall	4 hr
May 26, 12:23 PM CDT	Tornado Warning	AMA	Deaf Smith	67 min
May 26, 4:10 PM CDT	Flash Flood Warning	AMA	Randall	4 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1987 Every severe thunderstorm warning in 1987

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.