Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 201, NWS Amarillo, TX

September 13, 2002Sherman County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Sep 13, 2002, 5:24 PM CDT for Sherman County, Texas. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 13, 2002, 5:24 PM CDT (22:24 UTC)
Expired
Sep 13, 2002, 6:30 PM CDT
In force
66 min
Issued by
NWS Amarillo, TX
Area
Counties, with a storm outline in the text

County Sherman County, TX

The radar

The Amarillo radar (KAMA), 125 km from the middle of the area, began a volume at 22:27 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.4 hours before the alert went out and 126 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 2002-09-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2002-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1768 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
-29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

260 
WUUS54 KAMA 132224
SVRAMA
TXC421-132330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
522 PM CDT FRI SEP 13 2002

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SHERMAN COUNTY IN THE TEXAS PANHANDLE
  THIS INCLUDES THE CITY OF STRATFORD

* UNTIL 630 PM CDT

* AT 522 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 13 MILES NORTHWEST OF STRATFORD...MOVING EAST
  AT 20 MPH.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER 
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. THIS STORM CAN 
PRODUCE QUARTER TO GOLF BALL SIZE HAIL...DAMAGING WINDS IN EXCESS OF 
55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN AMARILLO.

LAT...LON 3648 10214 3631 10215 3619 10191 3612 10165
          3647 10168

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 13, 3:25 PM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, Sep 13, 3:25 PM CDT, 1 hour 59 minutes before
AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE AMARILLO TX
235 PM CDT FRI 13 SEP 2002

LATEST ANALYSIS SHOWS SFC TROF ORGANIZING ALONG TX/NM STATE LINE IN
ADVANCE OF A COLD FRONT PROGGED TO AFFECT THE AREA DURG NEXT 24 TO
36 HRS. TSTMS ALREADY DVLPG OVR HIGHER TERRAIN OF NRN NM AND SERN CO
AS POTENT SHORTWAVE TRAVERSING SRN ROCKIES INTERACTS WITH MOISTURE...
HEATING...AND ATTENDANT INSTABILITY. ISOLATED STORMS COULD BECOME
SEVERE AND WILL RETAIN SUCH WORDING IN ZONES FOR TNGT. WILL ALSO
HOLD ON TO AREAL QUALIFIERS BASED ON RADAR TRENDS. SOME SORT OF WIND
SHIFT WILL OCCUR THIS EVENING AND TNGT AHEAD OF MAIN PUSH OF COOL
AIR VIA A SURFACE HIGH WHICH IS SLATED TO BUILD INTO THE AREA LATE
SAT AND SAT NIGHT. MAIN UPPER TROF AXIS SHOULD BE E OF FCST AREA BY
LATE SATURDAY...AND WILL LEAVE POPS OUT FOR SAT NIGHT AT THIS TIME.
SHORT RANGE MODELS ARE IN REASONABLE AGREEMENT THRU 72 HRS WITH SOME
DIFFERENCES IN DETAILS AS IS TO BE EXPECTED WITH TIMING OF FRONTS
AND COOL AIR SURGES.

IT APPEARS WX DURG LATE WEEKEND INTO NEXT FRIDAY WILL BE FAIRLY
QUIET. BUT THIS IS SAID WITH CAUTION. LATEST MEDIUM RANGE MODELS ARE
NOT IN VERY GOOD AGREEMENT WITH UPPER AIR PATTERN DURG MIDDLE AND
LATTER PART OF NEXT WEEK SO CONFIDENCE IS LOW. REFER TO PMDEPD FOR
MORE DETAILS. FOR NOW...WILL MAINTAIN A DRY FCST WITH TEMPS NEAR
CLIMATOLOGY...WHICH IS WHAT PREVIOUS PCKG HAD. PRELIM VALUES FOLLOW.

FCSTID = 02

AMARILLO    58 76 54 74 / 50 20 00 00
BEAVER      60 76 53 74 / 60 20 00 00
BOISE CITY  54 73 50 72 / 50 20 00 00
BORGER      59 75 54 74 / 60 20 00 00
BOYS RANCH  57 75 53 75 / 50 20 00 00
CANYON      58 75 54 74 / 50 20 00 00
CLARENDON   64 77 57 76 / 50 20 00 00
DALHART     56 74 52 73 / 50 20 00 00
GUYMON      59 75 53 73 / 60 20 00 00
HEREFORD    57 75 54 74 / 50 20 00 00
LIPSCOMB    60 76 54 74 / 60 20 00 00
SHAMROCK    64 78 59 76 / 50 20 00 00
WELLINGTON  64 78 59 76 / 50 20 00 00

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

ANDRADE

In the hours before

Special weather statement, Sep 13, 1:00 PM CDT, 4 hours 24 minutes before
OKZ001>003-TXZ001>020-132200-

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
100 PM CDT FRI SEP 13 2002

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE ENTIRE TEXAS
AND OKLAHOMA PANHANDLES LATER THIS AFTERNOON AND TONIGHT.

THIS AFTERNOON...A SURFACE LOW PRESSURE CENTER IS LOCATED OVER
SOUTHWEST KANSAS BETWEEN GARDEN CITY AND LIBERAL. A PACIFIC COOL
FRONT EXTENDS SOUTH OF THE LOW TO NEAR CLAUDE TEXAS. A MUCH STRONGER
COOL FRONT IS EXPECTED TO MOVE ACROSS THE PANHANDLES ON SATURDAY.

SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP IN THE MOIST AND
UNSTABLE CONDITIONS OVER THE PANHANDLES THIS AFTERNOON AND TONIGHT.
THE NORTHERN AND EASTERN PANHANDLES APPEAR TO HAVE THE BEST CHANCE
FOR STORMS. STORMS INITIALLY WILL MOVE TOWARDS THE EAST BUT LATER
TONIGHT STORMS WILL MOVE IN A SOUTHEASTLY DIRECTION.

THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND DAMAGING
DOWNBURST WINDS. LOCALLY HEAVY RAINFALL AND DANGEROUS LIGHTNING
IS ALSO EXPECTED.

SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD REMAIN
ALERT AND BE READY FOR POSSIBLE ACTIVATION LATER THIS AFTERNOON AND
TONIGHT.

SLATTERY

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 13, 4:42 PM CDTSevere Thunderstorm WarningAMADallam48 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002

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.