Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 161, NWS Amarillo, TX

August 23, 2001Texas County, Oklahoma; Hansford County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 23, 2001, 7:18 PM CDT for Texas County, Oklahoma; Hansford County, Texas. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 23, 2001, 7:18 PM CDT (00:18 UTC)
Expired
Aug 23, 2001, 8:00 PM CDT
In force
42 min
Issued by
NWS Amarillo, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Texas County, OK, Hansford County, TX

The radar

The Amarillo radar (KAMA), 164 km from the middle of the area, began a volume at 00:20 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Aug 23, 3:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.3 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, Amarillo Airport, TX at 00:00Z on 2001-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 961 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2001-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.193958Sfc1 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
961 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
2135 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

847 
WUUS54 KAMA 240021
SVRAMA
OKC139-TXC195-240100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
718 PM CDT THU AUG 23 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN TEXAS COUNTY IN THE OKLAHOMA PANHANDLE
  NORTHERN HANSFORD COUNTY IN THE TEXAS PANHANDLE

* UNTIL 800 PM CDT

* AT 718 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES SOUTHEAST OF GUYMON...MOVING SOUTHEAST 
  AT 15 MPH.

* SOME LOCATIONS AFFECTED BY THE STORM INCLUDE...
  ADAMS...BAKER...HARDESTY...HOOKER AND OPTIMA

NICKEL SIZE HAIL...DAMAGING WINDS...AND TORRENTIAL RAINS ARE EXPECTED WITH
THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER.

LAT...LON 3669 10143 3647 10148 3634 10126 3656 10107
          3662 10096 3690 10102 3695 10122

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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 23, 1:45 PM CDT, 5 hours 33 minutes earlier.

Area forecast discussion, Aug 23, 1:45 PM CDT, 5 hours 33 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
145 PM CDT THU AUG 23 2001

SURFACE ANALYSIS SHOWED A BROAD AREA OF SURFACE LOW PRESSURE FROM
SOUTHERN KANSAS EXTENDING SOUTHWEST ACROSS THE PANHANDLES. AT UPPER-
LEVELS...A FAIRLY VIGOROUS SHORTWAVE IN EASTERN COLORADO WAS MOVING
INTO THE PLAINS THIS AFTERNOON. INSTABILITY AND JET ENERGY
ASSOCIATED WITH THIS FEATURE POINTED TO PROBABLE STORM INITIATION
LATE THIS AFTERNOON IN THE NORTHEASTERN TEXAS PANHANDLE. EXPECT SOME
OF THESE STORMS TO BECOME SEVERE MOVING TOWARD AND INTO NORTHWESTERN
OKLAHOMA EARLY THIS EVENING. THE MODELS DIFFER AS TO STORM
DEVELOPMENT FURTHER WEST. THE ETA AND RUC DEVELOP CONVECTION
AGGRESSIVELY IN THE WESTERN AND CENTRAL PANHANDLE LATER THIS EVENING
WITH THE AVN DRY. FAVOR THE ETA/RUC SOLUTION (PER COORDINATION WITH
SPC) WITH SCATTERED STORMS DEVELOPING AND PERSISTING THROUGH MUCH OF
THE NIGHT ASSOCIATED WITH A SECOND VORT MAX IN NORTHEASTERN NEW
MEXICO. THIS PIECE OF ENERGY SHOULD PUSH SOUTHEAST OF THE AREA FRIDAY
AS NORTHWEST FLOW STRENGTHENS. HOWEVER...WITH DEEP LOW-LEVEL MOISTURE
IN PLACE...STORMS COULD ONCE AGAIN FIRE UP ESPECIALLY IN THE EAST
PERSISTING INTO FRIDAY NIGHT. A COLD FRONT PUSHING INTO THE NORTHERN
ZONES AND ACROSS THE FORECAST AREA FRIDAY NIGHT AND SATURDAY WILL
AGGRAVATE THE SITUATION CONTINUING TO HELP FOCUS CONVECTIVE
DEVELOPMENT.

FOR THE EXTENDED PERIOD...PERSISTENT NORTHWEST FLOW DEVELOPS WITH
EMBEDDED SHORTWAVES SATURDAY NIGHT...SUNDAY NIGHT AND MONDAY NIGHT.
WILL UPGRADE TO A CHANCE OF STORMS IN THE EAST ON FRIDAY NIGHT AND
IN THE WEST ON SATURDAY NIGHT AND SUNDAY NIGHT WITH THE NEW AVN
DEPICTING MORE DETAIL IN THE SHORTWAVE PATTERN. TEMPERATURES SHOULD
BE A BIT COOLER THAN NORMAL AS HIGH PRESSURE SETTLES IN EARLY IN
THE WEEK. A LEE TROUGH SHOULD DEVELOP BY MID WEEK WITH TEMPERATURES
WARMING AND A BIT DRIER CONDITIONS POSSIBLE AS AN UPPER-LEVEL RIDGE
STRENGTHENS ACROSS THE SOUTHWESTERN STATES.

AMA 67/93 65/90 63 423
DHT 62/89 61/87 61 422

.AMA...
TX...NONE.
OK...NONE.

CB

In the hours before

Special weather statement, Aug 23, 5:40 PM CDT, 1 hour 38 minutes before
OKZ003-TXZ002>020-232300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
540 PM CDT THU AUG 23 2001

THE NATIONAL WEATHER SERVICE OFFICE IN AMARILLO HAS CLEARED THE
FOLLOWING COUNTIES FROM SEVERE THUNDERSTORM WATCH NUMBER 690...
IN THE OKLAHOMA PANHANDLE...BEAVER...IN THE TEXAS PANHANDLE...
HANSFORD...HARTLEY...MOORE...OCHILTREE...OLDHAM...AND SHERMAN.
THE THREAT OF SEVERE WEATHER HAS DIMINISHED IN THESE LOCATIONS.

SEVERE THUNDERSTORM WATCH NUMBER 690 REMAINS IN EFFECT UNYIL 9 PM
FOR THE FOLLOWING COUNTIES IN THE TEXAS PANHANDLE...ARMSTRONG...
CARSON...COLLINGSWORTH...DEAF SMITH...DONLEY...GRAY...HEMPHILL...
HUTCHINSON...LIPSCOMB...POTTER...RANDALL...ROBERTS...AND WHEELER.

ANDRADE
Special weather statement, Aug 23, 6:29 PM CDT, 49 minutes before
TXZ005-008>010-012>020-240000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
629 PM CDT THU AUG 23 2001

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS CLEARED A PORTION OF
SEVERE THUNDERSTORM WATCH 690. COUNTIES CLEARED INCLUDE:

IN THE TEXAS PANHANDLE:
POTTER...LIPSCOMB...HUTCHINSON...ROBERTS...HEMPHILL...
CARSON...GRAY...DEAF SMITH...RANDALL...

THIS INCLUDES THE CITIES OF...AMARILLO...BOOKER...BORGER...
CANADIAN...CANYON...HEREFORD...MIAMI...PAMPA...AND PANHANDLE...

SEVERE THUNDERSTORM WATCH 690 REMAINS VALID UNTIL 900 PM CDT
THURSDAY FOR THE FOLLOWING COUNTIES:

IN THE TEXAS PANHANDLE:
WHEELER...ARMSTRONG...DONLEY...COLLINGSWORTH...

THIS INCLUDES THE CITIES OF...CLARENDON...CLAUDE...SHAMROCK...
AND WELLINGTON...

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 7:58 PM CDTSevere Thunderstorm WarningAMABeaver47 min
Aug 24, 5:20 PM CDTSevere Thunderstorm WarningAMADonley55 min
Aug 24, 6:05 PM CDTSevere Thunderstorm WarningAMALipscomb55 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001

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; radar from the NEXRAD Level II archive.