Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 1, NWS Amarillo, TX

April 6, 2002Potter County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 6, 2002, 7:45 PM CST for Potter County, Texas. It was in force for 45 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: Apr 6, 2002, 7:45 PM CST (01:45 UTC)
Expired: Apr 6, 2002, 8:30 PM CST
In force: 45 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

County Potter County, TX

The radar

The Amarillo radar (KAMA), 22 km from the middle of the area, began a volume at 01:38 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.

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 00:00Z, 1.8 hours before the alert went out and 23 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 508 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 178 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.

000 
WUUS54 KAMA 070145
SVRAMA
TXC375-070230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
745 PM CST SAT APR 6 2002

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  POTTER COUNTY IN THE TEXAS PANHANDLE

* UNTIL 830 PM CST

* AT 745 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES NORTHEAST OF BUSHLAND...OR ABOUT 10
  MILES NORTHWEST OF AMARILLO...MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS AFFECTED BY THE STORM INCLUDE...
  BISHOP HILLS
  HIGHWAY 287 NORTH OF AMARILLO

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

LAT...LON 3518 10208 3527 10215 3560 10178 3534 10163
          3518 10191

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 6, 2:30 PM CST, 5 hours 15 minutes earlier.

Area forecast discussion, Apr 6, 2:30 PM CST, 5 hours 15 minutes before

TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
230 PM CST SAT APR 6 2002

CLOUD COVER WILL CONTINUE TO HAMPER SURFACE HEATING AND INSTABILITY
ACROSS THE CWA THIS AFTERNOON. SATELLITE SHOWS THICK CLOUD LAYER
WELL TO THE WEST OF THE AREA...BUT A LARGE BREAK SHOWING UP IN EAST
CENTRAL NM. WILL HAVE TO WATCH THE WESTERN EDGE OF CWA
THROUGH LATE THIS AFTERNOON. TONIGHT...MOISTURE AND DYNAMICS SHOULD
START TO COME TOGETHER AS THE TROUGH MAKES ITS WAY OVER THE MTNS
NEARS THE AREA TOWARD DAYBREAK SUNDAY. FEWER CLOUDS SUNDAY WILL ALLOW
SURFACE HEATING AND SHOULD BRING DRIER AIR EASTWARD. THUNDERSTORMS
CAN BE EXPECTED OVER A WIDE AREA WITH SOME SEVERE STORMS POSSIBLE...
ESPECIALLY IN THE CENTRAL AND EASTERN SECTIONS. SUNDAY NIGHT...
NORTHWEST FLOW SHOULD SPREAD OVER THE CWA AS THE TROUGH MOVES
FURTHER EASTWARD.

DRIER AIR BUILDS OVER THE AREA EARLY NEXT WEEK AND ALLOW SOME
WARMING THROUGH MIDWEEK. ANOTHER SYSTEM MOVES INTO THE PLAINS
THURSDAY BUT NOW APPEARS TO MOVE NORTH OF THE AREA. SOME COOL AIR
APPEARS TO AFFECT TEMPERATURES...BUT MOISTURE APPEARS WEAK AT THIS
POINT.  WILL LOWER TEMPERATURES SLIGHTLY FOR FRIDAY BUT WILL NOT
CHANGE PRECIP CHANCES AT THIS TIME.

AMA BB 048/065 042/065 043 652
DHT BB 047/070 040/062 042 432
BGD BB 048/065 041/064 063 552
GUY BB 046/068 039/061 044 443

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

WYNNE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 8:57 PM CST	Severe Thunderstorm Warning	AMA	Hutchinson	48 min
Apr 6, 10:49 PM CST	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb	56 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every 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.