Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 85, NWS Amarillo, TX

May 20, 2001Beaver County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 20, 2001, 10:43 PM CDT for Beaver County, Oklahoma. It was in force for 62 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
May 20, 2001, 10:43 PM CDT (03:43 UTC)
Expired
May 20, 2001, 11:45 PM CDT
In force
62 min
Issued by
NWS Amarillo, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Beaver County, OK

The radar

The Dodge City radar (KDDC), 122 km from the middle of the area, began a volume at 03:43 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 nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 3.7 hours before the alert went out and 125 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, Dodge City, at 00:00Z on 2001-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 184 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, Dodge City, at 00:00Z on 2001-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 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
184 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
1698 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KAMA 210345
SVRAMA
OKC007-210445-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
1043 PM CDT SUN MAY 20 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BEAVER COUNTY IN THE OKLAHOMA PANHANDLE

* UNTIL 1145 PM CDT

* AT 1043 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES WEST OF BOYD...OR ABOUT 22 MILES SOUTH
  OF LIBERAL KANSAS...MOVING SOUTHEAST AT 40 MPH.

DESTRUCTIVE WINDS CAN BE EXPECTED. IF YOU CANNOT GET UNDERGROUND...GO
TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS

LAT...LON 3694 10092 3655 10089 3654 10003 3696 10021

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 May 20, 9:15 PM CDT, 1 hour 28 minutes earlier.

Area forecast discussion, May 20, 9:15 PM CDT, 1 hour 28 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
915 PM CDT SUN MAY 20 2001

ISSUED UPDT TO ZONES...ISSUING WND ADZY FOR ALL ZONES BUT SERN SXNS
OF TX PNHDL.  00Z SFC ANALYSIS INDCD VERY TIGHT PRES GRADIENT BHND
CDFNT...WITH 9 MB PER 3 HR PRES RISES OVR NERN CO.  TIGHT GRADIENT WL
DVLP/MOV SWD INTO FCST AREA DURG REST OF TNGT.  ALSO CALLED FOR AREAL
QUALIFIERS FOR TSTMS TNGT INSTEAD OF UNCERTAINTY TERMS.  PLENTY OF
CNVGNC ACMPYG CDFNT AND NOSE OF INCOMING H8 JETSTREAK.  NO CHANGES TO
LATER PDS.  03

.AMA...
TX...WND ADZY TONIGHT TX ZNS 01>10..11>13..16>18.
OK...WND ADZY TONIGHT OK ZNS 01>03.

COCKRELL/SLATTERY

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 10:12 PM CDTSevere Thunderstorm WarningAMATexas63 min
May 20, 10:22 PM CDTSevere Thunderstorm WarningAMACimarron38 min
May 20, 11:08 PM CDTTornado WarningAMABeaver, Texas37 min
May 20, 11:45 PM CDTSevere Thunderstorm WarningAMABeaver45 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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.