Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 182, NWS Amarillo, TX

September 19, 2001Carson County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Sep 19, 2001, 6:34 PM CDT for Carson County, Texas. It was in force for 56 min. 8 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
Sep 19, 2001, 6:34 PM CDT (23:34 UTC)
Expired
Sep 19, 2001, 7:30 PM CDT
In force
56 min
Issued by
NWS Amarillo, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Carson County, TX

The radar

The Amarillo radar (KAMA), 31 km from the middle of the area, began a volume at 23:33 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

TimeReportWhereRemark
Sep 19, 6:37 PM CDTHail 1.5Pantex, TX
Sep 19, 6:40 PM CDTHail 1.75Pantex, TX
Sep 19, 6:50 PM CDTHail 1.75Pantex, TX
Sep 19, 6:55 PM CDTTornado F0Amarillo, TXThe tornado path length and width were estimated. The tornado remained over open country.
Sep 19, 6:56 PM CDTTornado F0Panhandle, TXThe tornado path length and width were estimated. The tornado remained over open country. This tornado orginally touched down just inside the Potter county line and then moved into Carson county.
Sep 19, 7:03 PM CDTHail 1Pantex, TX
Sep 19, 7:06 PM CDTHail 2.5Pantex, TX
Sep 19, 7:15 PM CDTHail 0.88Pantex, 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.6 hours before the alert went out and 30 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 2001-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 471 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 2001-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -44 square meters per square second.1939587897Sfc1 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
471 J/kg
Mixed-layer CIN
-150 J/kg
Mixed-layer LCL
889 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-44 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

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

117 
WUUS54 KAMA 192333
SVRAMA
TXC065-200030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
634 PM CDT WED SEP 19 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CARSON COUNTY IN TEXAS

* UNTIL 730 PM CDT

* AT 634 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 14 MILES WEST OF PANHANDLE...MOVING SOUTHEAST
  AT 10 MPH.

* SOME LOCATIONS AFFECTED BY THE STORM INCLUDE...
  PANHANDLE...WHITE DEER...SKELLYTOWN AND GROOM

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

LAT...LON 3520 10163 3519 10110 3562 10109 3563 10161

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 19, 4:40 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Sep 19, 4:40 PM CDT, 1 hour 54 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
440 PM CDT WED SEP 19 2001

MID TO UPPER LEVEL MOISTURE STREAMING NORTHEAST OVER THE SOUTHERN
ROCKIES AND SOUTHERN HIGH PLAINS THIS AFTERNOON AS LOW-LEVEL
MOISTURE WAS BEING PULLED NORTH ACROSS WEST TEXAS AND INTO SOUTHWEST
KANSAS...IN ADVANCE OF A DEVELOPING DRYLINE IN EASTERN NEW MEXICO.

ISOLATED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED TONIGHT PRIMARILY
NEAR BANDS OF LOW-LEVEL CONVERGENCE STRETCHING FROM SOUTHWESTERN
KANSAS INTO SOUTHEASTERN COLORADO...AS WELL AS ACROSS THE CENTRAL
AND SOUTHWESTERN TEXAS PANHANDLE. THUNDERSTORMS WILL LIKELY RECEIVE
ADDITIONAL LIFT OVERNIGHT FROM STRENGTHENING LOW-LEVEL WARM AIR
ADVECTION PATTERN/ISENTROPIC LIFT.

DRYLINE TO TIGHTEN UP ON THURSDAY AS IT PUSHES INTO THE CENTRAL
TEXAS PANHANDLE. ISOLATED THUNDERSTORMS AGAIN POSSIBLE THURSDAY
AFTERNOON...MAINLY ACROSS THE EAST. HOWEVER...COLD FRONT WILL PUSH
SOUTH INTO THE OKLAHOMA PANHANDLE THURSDAY EVENING AND THROUGH THE
TEXAS PANHANDLE BY LATE THURSDAY NIGHT. FOR NOW WILL INTRODUCE
SLIGHT CHANCE POPS FOR THURSDAY NIGHT...BUT LATER SHIFTS MAY HAVE TO
INCREASE POP VALUES AS MOIST UPSLOPE FLOW STRENGTHENS BEHIND FRONT.
ALSO...MID LEVEL SUBTROPICAL MOISTURE WILL HANG AROUND AS WELL WITH
BANDS OF EMBEDDED VORTICITY. LAST SEVERAL SHORT RANGE MODEL RUNS...
PARTICULARLY ETA/AVN...HAVE INDICATED BEST CHANCE FOR PRECIPITATION
TO BE SATURDAY AND SATURDAY NIGHT...PRIMARILY AS A RESULT OF
STRONGER PASSING TO THE NORTH OF THE AREA. THEREFORE...RAISED POPS
FROM SLIGHT CHANCE TO CHANCE. UPSLOPE COMPONENT EXPECTED TO PERSIST
THROUGH REST OF THE WEEK...SO NO CHANGES TO SUNDAY FORECAST OF SLIGHT
CHANCE TSRA.

IN THE EXTENDED...UPPER LEVEL FLOW WILL CONTINUE TO VEER...
PRACTICALLY BECOMING NORTHERLY BY EARLY NEXT WEEK. THIS MAY AID
ANOTHER WEAK COLD FRONT TO PUSH SOUTH ACROSS THE AREA BY SUNDAY
NIGHT/MONDAY. UPSTREAM FLOW WILL BE STRONG ENOUGH TO SPILL OVER THE
NORTHERLY FLOW...ALLOWING RIDGE TO DEVELOP OVER THE CENTRAL U.S. BY
MID WEEK...RESULTING IN A WARMING TREND.

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

JH

In the hours before

Special weather statement, Sep 19, 3:20 PM CDT, 3 hours 14 minutes before
OKZ001>003-TXZ001>020-192200-

TEXAS/OKLAHOMA PANHANDLES THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
320 PM CDT WED SEP 19 2001

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS ALL OF THE
TEXAS AND OKLAHOMA PANHANDLES THIS AFTERNOON AND THIS EVENING.

A WARM...MOIST...AND UNSTABLE AIRMASS IS IN PLACE ACROSS THE
PANHANDLES THIS AFTERNOON. A SURFACE LOW PRESSURE TROUGH ACROSS
SOUTHEAST NEW MEXICO AND SOUTHWEST KANSAS WILL MOVE SOUTHEAST INTO
WESTERN SECTIONS OF THE PANHANDLES THIS AFTERNOON...AND WILL CONTINUE
MOVING SOUTHEAST THIS EVENING AND TONIGHT. CONVERGING WINDS ALONG THE
TROUGH WILL LEAD TO THE DEVELOPMENT OF THUNDERSTORMS. DUE TO THE
INSTABILITY ALREADY IN PLACE...STORMS WILL HAVE THE POTENTIAL TO
STRENGTHEN QUICKLY. SOME OF THE STRONGER STORMS COULD BECOME SEVERE.

THE THUNDERSTORMS ARE EXPECTED TO MOVE SOUTHEAST INTO PANHANDLES.
THE MAIN THREATS FROM THE STORMS WILL BE LARGE HAIL...DAMAGING
WINDS...AND HEAVY RAIN. THE TURNING OF WINDS WITH HEIGHT WILL
SUPPORT ORGANIZED STRONG TO SEVERE THUNDERSTORMS...BUT THE WIND
SPEEDS AT THE MID LEVELS ARE EXPECTED TO REMAIN BELOW THOSE NEEDED
FOR TORNADO DEVELOPMENT.

SPOTTERS AND EMERGENCY MANAGEMENT OFFICIALS ACROSS THE TEXAS AND
OKLAHOMA PANHANDLES SHOULD REMAIN ALERT FOR POSSIBLE ACTIVATION THIS
AFTERNOON OR THIS EVENING.

COCKRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 19, 6:47 PM CDTTornado WarningAMACarson, Potter43 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.