Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 174, NWS Amarillo, TX

September 3, 2001Potter County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Sep 3, 2001, 5:26 PM CDT for Potter County, Texas. It was in force for 64 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
Sep 3, 2001, 5:26 PM CDT (22:26 UTC)
Expired
Sep 3, 2001, 6:30 PM CDT
In force
64 min
Issued by
NWS Amarillo, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Potter County, TX

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.4 hours before the alert went out and 36 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 12:00Z on 2001-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 641 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 12:00Z on 2001-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
641 J/kg
Mixed-layer CIN
-261 J/kg
Mixed-layer LCL
1483 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

129 
WUUS54 KAMA 032227
SVRAMA
TXC375-032330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
526 PM CDT MON SEP 3 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN POTTER COUNTY IN TEXAS

* UNTIL 630 PM CDT

* AT 526 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WEST CENTRAL POTTER COUNTY...OR ABOUT 19
  MILES NORTHWEST OF AMARILLO...MOVING SOUTHWEST AT 15 MPH.

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

LAT...LON 3562 10183 3561 10213 3520 10217 3519 10197

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 Sep 3, 2:53 PM CDT, 2 hours 33 minutes earlier.

Area forecast discussion, Sep 3, 2:53 PM CDT, 2 hours 33 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
253 PM CDT MON SEP 3 2001

PRIMARY FEATURE THIS EVENING WILL BE EVOLUTION OF VORT MAX CURRENTLY
CHURNING SOUTHWESTWARD OVER NORTHWEST OKLAHOMA. IN THE LOW LEVELS...
AMPLE MOISTURE AND MODERATE INSTABILITY CONTINUES PRIMARILY OVER THE
CENTRAL AND EASTERN PANHANDLES WITH SURFACE BASED CAPE VALUES IN THE
1000-1500 J/KG RANGE. MAIN INSTABILITY AXIS IS EAST OF A LINE FROM
EASTERN TEXAS COUNTY TO BORGER TO PALO DURO CANYON WITH LI/S AS LOW
AS MINUS 7 OVER COLLINGSWORTH COUNTY. THUNDERSTORMS CURRENTLY
DEVELOPING PER VISIBLE SATELLITE IMAGERY OVER NORTHEAST ZONES.
EXPECT STORMS TO DEVELOP SOUTH/SOUTHWEST OVER CENTRAL AND POSSIBLY
WESTERN COUNTIES BEFORE VORT MAX MOVES SOUTH OF THE PANHANDLES
TUESDAY.

RAIN CHANCES SHOULD BE CONSIDERABLY LESS ON TUESDAY BUT NOT
ALTOGETHER ZERO. WILL KEEP SLIGHT POPS GOING MAINLY DUE TO PROXIMITY
OF UPPER LOW SOUTH OF THE PANHANDLES. BY WEDNESDAY UPPER HIGH OVER
CENTRAL PLAINS SHOULD BECOME OUR PRIMARY WEATHER FEATURE. WILL KEEP
FORECAST DRY BASED ON 12Z AVN AND EXPECTED SUBSIDENCE ASSOCIATED
WITH UPPER HIGH.

MID LEVEL RIDGE IS PROGED TO BUILD LATE IN THE WEEK OVER SOUTHERN
ROCKIES PER MEDIUM RANGE MODELS. PRIMARY CHALLENGE WILL BE TIMING
SHORT WAVE ENERGY. MID LEVEL PATTERN MAY FAVOR MOUNTAIN CONVECTION
PUSHING OVER THE PLAINS WITH TWO STRONG WEATHER SYSTEMS OVER THE
EASTERN PACIFIC.

AMA BU 59/85 60/90 61 4-2
DHT BU 58/84 58/86 57 3-2

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

SLATTERY

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 7:29 PM CDTSevere Thunderstorm WarningAMACarson46 min

Nearby

Severe 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.