Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 46, NWS Amarillo, TX

April 22, 2001Hansford County, Hutchinson County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 22, 2001, 8:35 AM CDT for Hansford County, Hutchinson County, Texas. It was in force for 55 min. 2 reports came from 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, with what was reported inside it.

The facts

Issued: Apr 22, 2001, 8:35 AM CDT (13:35 UTC)
Expired: Apr 22, 2001, 9:30 AM CDT
In force: 55 min
Issued by: NWS Amarillo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Hansford County, TX, Hutchinson County, TX

The radar

The Amarillo radar (KAMA), 106 km from the middle of the area, began a volume at 13:38 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 22, 9:00 AM CDT	Hail 0.75	Gruver, TX
Apr 22, 9:05 AM CDT	Hail 0.75	Gruver, 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 nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 1.6 hours before the alert went out and 224 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: 1369 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 670 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 310 m²/s²
0-3 km storm-relative helicity: 330 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KAMA 221337
SVRAMA
TXC195-233-221430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
835 AM CDT SUN APR 22 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HUTCHINSON COUNTY IN THE TEXAS PANHANDLE
  HANSFORD COUNTY IN THE TEXAS PANHANDLE

* UNTIL 930 AM CDT

* AT 835 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A LINE OF SEVERE THUNDERSTORMS FROM 19 MILES NORTHWEST OF          
  SPEARMAN TO 3 MILES WEST OF BORGER...MOVING EAST AT 30 MPH.

* SOME LOCATIONS AFFECTED BY THESE STORMS INCLUDE...
  BORGER...SPEARMAN...GRUVER...MORSE...PRINGLE...SANFORD AND STINNETT

LARGE HAIL AND DAMAGING WINDS ARE EXPECTED WITH THESE STORMS. TAKE 
COVER IN A SUBSTANTIAL SHELTER.

LAT...LON 3649 10160 3565 10159 3564 10112 3649 10111

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 Apr 22, 2:54 AM CDT, 5 hours 41 minutes earlier.

Area forecast discussion, Apr 22, 2:54 AM CDT, 5 hours 41 minutes before

TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
254 AM CDT SUN APR 22 2001

BIGGEST CONCERNS THIS FCST PD ARE THE WINDS AND FIRE WEATHER THREAT.
RIGHT NOW...A LULL IN THE ACTION AS FAR AS SEVERE WX GOES...HWVR
MORE ACTVTY PSBL LTR AS MAIN MID AND UPR LOW EJECTS OUT OF THE SWRN
STATES LTR TNGT AND THEN NEWD INTO CO/KS BY 18Z SUN OR SO.  LOOKING
AT HIGH WIND DECISION TREE...APRS THAT THE 700 MB GRADIENT METHOD
COMES OUT TO AT LEAST 90 TO 99 METERS OVR 200 NM ON SUNDAY ACRS THE
PNHDLS. THIS TRANSLATES INTO WND SPDS OF AT LEAST 40 TO 50 MPH WITH
GUSTS TO 60 MPH OR HIER...OTRW HIGH WND WRNG CRITERIA.  MOS GUIDANCE
FCSTG MIN RH VALUES NR OR SLGTLY BLO 20 PCT BY SUN AFTN ACRS THE
PNHDLS. WL LIKELY GO WITH A HI WND WRNG FOR THE TX AND OK PNHDLS AND
WL ISSUE A RED FLAG WRNG FOR FIRE WX FOR THE TX PNHDL SUN.

STRONG CDFNT MOVS OUT OF THE CNTRL PLNS AND CNTRL RCKYS BY MIDDAY
SUN AND THEN MOVS THRU THE OK AND NRN TX PNHDLS DURING THE AFTN AND
THEN THRU THE RMNDR OF THE TX PNHDL BY ERY SUN EVE.  MUCH COLDER AMS
ADVECTS DOWN INTO THE FA SUN NGT AND MON AS SFC HIGH MOVS OVR THE
PNHDLS.  THE SFC HIGH THEN FCSTD TO RMN OVR OR NR THE PNHDLS MON NGT
AND TUE.  ANOTHER WKR CDFNT FCSTD TO MOV OUT OF CO AND KS TUE AND
TUE NGT AND THEN FCSTD TO BCM STNRY NR THE OK PNHDL BY WED.  SFC
HIGH DROPPING SEWD OUT OF THE PLNS STATES WED MAY HELP THE CDFNT TO
MOV THRU THE FA LT WED AFTN/ERY WED EVE.  LEE SIDE SFC TROF DVLPS
ACRS ERN CO AND ERN NM THU.   CURRENTLY...FCST HAS SLGT CHC FOR
CNVTN THU AND FRI.  LACK OF LO LVL MSTR WL BE A CONCERN FOR CNVTV
DVLPMT.  MAY NEED TO DROP THE SLGT CHC...BUT WL LOOK AT LTST MRF
BFR MAKING ANY CHGS TO CURRENT EXTENDED FCST.  LOOKS AS THOUGH
EXTENDED FCST WL BE DRY.

THANK YOU FOR THE COORDINATION WSFO LBB...ABQ...DDC...AND OUN.

PRELIM CCF:

AMA 070/039 064/038 073  300
GUY 068/038 063/037 072  300
DHT 069/038 063/036 071  200

.AMA...
TX...HIGH WIND WARNING TODAY FOR ZONES 001>020 TIL 00Z.
OK...HIGH WIND WARNING TODAY FOR ZONES 001>003 TIL 00Z.

SCHNEIDER/BROYLES/BILODEAU

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 8:54 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb	51 min
Apr 21, 9:02 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	43 min
Apr 21, 9:14 PM CDT	Severe Thunderstorm Warning	AMA	Randall	46 min
Apr 21, 9:31 PM CDT	Severe Thunderstorm Warning	AMA	Potter	44 min
Apr 21, 9:41 PM CDT	Severe Thunderstorm Warning	AMA	Oldham	34 min
Apr 21, 9:51 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Moore	24 min
Apr 21, 9:56 PM CDT	Severe Thunderstorm Warning	AMA	Carson	34 min
Apr 21, 10:28 PM CDT	Severe Thunderstorm Warning	AMA	Hansford	47 min
Apr 22, 10:55 AM CDT	Severe Thunderstorm Warning	AMA	Collingsworth	35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.