Alert archive / Texas / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 60, NWS Amarillo, TX

May 18, 1990Ochiltree County, Texas; Beaver County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 18, 1990, 6:39 PM CDT for Ochiltree County, Texas; Beaver County, Oklahoma. It was in force for 66 min. 3 reports 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: May 18, 1990, 6:39 PM CDT (23:39 UTC)
Expired: May 18, 1990, 7:45 PM CDT
In force: 66 min
Issued by: NWS Amarillo, TX
Area: Whole counties

Counties Beaver County, OK, Ochiltree 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
May 18, 6:45 PM CDT	Hail 2.5	Ochiltree, TX
May 18, 6:53 PM CDT	Hail 4	Ochiltree, TX
May 18, 7:32 PM CDT	Hail 0.75	Beaver, OK

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

Dodge City, (KDDC), launched 12:00Z, 11.7 hours before the alert went out and 155 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1363 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 18, 2:39 PM CDT, 4 hours before

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Special weather statement, May 18, 4:38 PM CDT, 2 hours 1 minute before

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Special weather statement, May 18, 5:37 PM CDT, 1 hour 2 minutes before

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Special weather statement, May 18, 5:57 PM CDT, 42 minutes before

TTAATX KAMA 182257
TXZ001>012-COZ015>017-NMZ005-009-013-OKZ001>004-009-014-021-
KSZ003-006-190050-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
556 PM CDT FRI MAY 18 1990

...TORNADO WATCH 264 IS IN EFFECT FOR THE EASTERN TWO-THIRDS OF THE
TEXAS AND OKLAHOMA PANHANDLES UNTIL 10 PM CDT...

LATEST WEATHER MAPS SHOW THAT A DRYLINE WAS LOCATED FROM JUST WEST OF
LIBERAL KANSAS...TO JUST WEST OF AMARILLO...AND TO BETWEEN WINK AND
MIDLAND TEXAS.  AIR BEHIND THE DRYLINE IS TOO DRY TO SUPPORT THUNDERSTORMS
SO DALLAM...HARTLEY...OLDHAM...DEAF SMITH...PARMER...AND CASTRO COUNTIES
OF THE TEXAS PANHANDLE HAVE BEEN DROPPED FROM TORNADO WATCH 264.

EAST OF THE DRYLINE THE ATMOSPHERE WAS STILL QUITE MOIST AND UNSTABLE.
A TROUGH OF LOW PRESSURE WAS ALSO LOCATED IN THE EASTERN TEXAS PANHANDLE.
A LINE OF SHOWERS AND THUNDERSHOWERS WAS DEVELOPING NEAR THIS TROUGH AT
550 PM CDT NEAR CLARENDON AND ALANREED.  THESE SHOWERS ARE EXPECTED TO
INCREASE IN INTENSITY OVER THE NEXT HOUR.
ANOTHER THUNDERSTORM WAS JUST EAST OF SPEARMAN WAS MOVING INTO OCHILTREE
COUNTY.

MOVEMENT OF ALL PRECIPITATION WAS NORTHEAST AT 25 MILES AN HOUR.

TWG

Special weather statement, May 18, 6:33 PM CDT, 6 minutes before

TXZ001>012-COZ015>017-NMZ005-009-013-OKZ001>004-009-014-021-
KSZ003-006-190040-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
632 PM CDT FRI MAY 18 1990

...THUNDERSTORMS ARE INCREASING IN INTENSITY IN THE EASTERN TEXAS
PANHANDLE THIS EVENING...

AT 625 PM CDT...THUNDERSTORMS WITH VERY HEAVY RAIN AND POSSIBLY SOME
SMALL HAIL AND GUSTY WINDS WERE LOCATED NEAR PERRYTON...MCLEAN...AND
12 MILES NORTHWEST OF SHAMROCK.

MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR.

REMEMBER A TORNADO WATCH IS IN EFFECT UNTIL 10PM CDT FOR THE EASTERN
TWO-THIRDS OF THE TEXAS AND OKLAHOMA PANHANDLES.  A TORNADO WATCH MEANS
THAT CONDITIONS ARE FAVORABLE FOR THE FORMATION OF SEVERE THUNDERSTORMS
AND POSSIBLY TORNADOES.  RESIDENTS OF WHEELER...OCHILTREE...AND LIPCOMB
COUNTIES OF THE TEXAS PANHANDLE SHOULD BE ESPECIALLY ALERT TO RAPIDLY
CHANGING WEATHER CONDITIONS THIS EVENING.  STAY TUNED TO YOUR NOAA
WEATHER RADIO OR LOCAL RADIO/TV STATIONS FOR LATER UPDATES AND
STATEMENTS.

TWG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 3:01 PM CDT	Severe Thunderstorm Warning	AMA	Wheeler	44 min

Nearby

Severe Thunderstorm Warnings in Texas, 1990 Severe Thunderstorm Warnings in Oklahoma, 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.