Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 34, NWS Amarillo, TX

April 10, 2001Hemphill County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 10, 2001, 11:37 PM CDT for Hemphill County, Texas. It was in force for 68 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 10, 2001, 11:37 PM CDT (04:37 UTC)
Expired: Apr 11, 2001, 12:45 AM CDT
In force: 68 min
Issued by: NWS Amarillo, TX
Area: Whole counties

County Hemphill County, TX

The radar

The Amarillo radar (KAMA), 147 km from the middle of the area, began a volume at 04:38 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.

What was reported inside it

Time	Report	Where	Remark
Apr 10, 11:53 PM CDT	Hail 1	Canadian, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 10, 7:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 4.6 hours before the alert went out and 146 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: 579 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1839 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 262 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KAMA 110441
SVRAMA
OKC007-TXC211-295-110545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
1137 PM CDT TUE APR 10 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BEAVER COUNTY IN THE OKLAHOMA PANHANDLE
  HEMPHILL COUNTY IN THE TEXAS PANHANDLE
  LIPSCOMB COUNTY IN THE TEXAS PANHANDLE

* UNTIL 1245 AM CDT

* AT 1137 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 6 MILES WEST OF FORGAN TO 19
  MILES SOUTH OF CANADIAN...MOVING EAST AT 40 MPH.

* SOME LOCATIONS AFFECTED BY THESE STORMS INCLUDE...
  BEAVER...CANADIAN...LIPSCOMB...ELMWOOD...FORGAN...GATE...
  SLAPOUT...BOOKER...FOLLETT...DARROUZETT HIGGINS AND LAKE MARVIN.

LARGE HAIL UP TO ONE AND ONE-HALF INCHES IN DIAMETER AND WIND GUSTS 
IN EXCESS OF 55 MPH CAN BE EXPECTED WITH THIS LINE OF STORMS.

A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY 
FROM SEVERE THUNDERSTORMS.

LAT...LON

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 10, 3:45 PM CDT, 7 hours 52 minutes earlier.

Area forecast discussion, Apr 10, 3:45 PM CDT, 7 hours 52 minutes before

TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
345 PM CDT TUE APR 10 2001

SFC WAVE IS OVR N-CNTRL KS ATTM...SE OF HLC.  DRYLN EXTDS SWWD FM
THIS LOW THRU NWRN CORNER OF OK...TO JUST E OF AMA...TO JUST W OF
HOB.  SFC WAVE HAS TROF AXIS WHICH DIPS SWWD INTO WRN OK PNHDL...
THEN ARCS NWWD TO SFC LOW OVR CNTRL CO...NR LXV.  THIS LOW HAS BEEN
DEEPENING SGFNTLY DURG DAY WITH SFC TROF EXTDG SWD FM SAME THRU
CNTRL NM TO NR ELP.  PAC CDFNT MOVG THRU WRN NM...WITH -SN NOTED
OVR HIR SXNS OF AZ.  H5 LOW CURRENTLY NR CNTRL AZ...WITH COLD POOL
...STG DYNAMICS...AND DIFFLUENT FLOW...OVR AREA OF PRES FALLS...
CNTRL CO THRU SWRN NM.  DRYLN EXPCD TO RETREAT THIS EVE DUE TO
APCHG DYANMICS.

WITH INSTBY AND SHEAR EXPCD TO INCR OVR ERN ZNS...WL FCST NMRS TSTMS.
OVR CNTRL ZNS WL FCST SCT TSTMS...AND WL KEEP SLGT CHC TSTMS GOING
OVR WRN ZNS.  SVR TSTMS EXPCD...SPLY OVR ERN ZNS.  DRYLN...SFC
TROF...AND PAC CDFNT WL ALL MOV THRU PNHDLS BY ARND 06Z...WITH CNVGNC
INCRG THIS EVE.  PRES GRADIENT WL TIGHTEN ENOUGH TO WARRANT ISSUANCE
OF WND ADZY TNGT...AND WL LIKELY BE NEEDED THRU WED MRNG AS WELL.

WED NGT THRU TUE EXPCD TO BE UNEVENTFUL AS H5 FLOW TRENDS TO ZONAL...
AND THEN BACKS AGAIN AHEAD OF NEXT TROF ERY NEXT WK.  WK CDFNT MAY
ENTER FCST AREA ON TUE...BUT MSTR RTRN NOT ANTICIPATED PRIOR TO
FROPA.  03

.AMA...
TX...WIND ADVISORY TNGT TX ZNS 01>20.
OK...WIND ADVISORY TNGT OK ZNS 01>03.

COCKRELL

In the hours before

Special weather statement, Apr 10, 10:50 PM CDT, 47 minutes before

OKZ001-002-110415-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1050 PM CDT TUE APR 10 2001

THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH
NUMBER 121 FOR CIMARRON COUNTY IN THE OKLAHOMA PANHANDLE. THE LINE
OF STORMS HAS MOVED OUT OF THE COUNTY AND NO ADDITIONAL SEVERE
WEATHER IS EXPECTED THE REST OF TONIGHT.

SEVERE THUNDERSTORM WATCH NUMBER 121 REMAINS IN EFFECT FOR TEXAS
COUNTY IN THE OKLAHOlMA UNTIL 1 AM CDT WEDNESDAY.

ANDRADE

Special weather statement, Apr 10, 11:05 PM CDT, 32 minutes before

OKZ003-TXZ003>005-007>010-012>015-017>020-110425-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1105 PM CDT TUE APR 10 2001

THE NATIONAL WEATHER SERVICE HAS CANCELED TORNADO WATCH NUMBER 119
FOR MOORE...POTTER...AND RANDALL COUNTIES IN THE TEXAS PANHANDLE.
STORMS HAVE MOVED OUT OF THESE COUNTIES AND NO ADDITIONAL SEVERE
WEATHER IS EXPECTED THE REST OF TONIGHT.

TORNADO WATCH NUMBER 119 REMAINS IN EFFECT FOR HANSFORD...OCHILTREE
...LIPSCOMB...HUTCHINSON...ROBERTS...HEMPHILL...CARSON...GRAY...
WHEELER...ARMSTRONG...DONLEY...AND COLLINGSWORTH COUNTIES IN THE
TEXAS PANHANDLE...AND BEAVER COUNTY IN THE OKLAHOMA PANHANDLE UNTIL
MIDNIGHT.

ANDRADE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 9:13 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	32 min
Apr 10, 9:27 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	48 min
Apr 10, 10:10 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson	65 min
Apr 10, 10:22 PM CDT	Tornado Warning	AMA	Hutchinson	33 min
Apr 10, 10:49 PM CDT	Severe Thunderstorm Warning	AMA	Gray	61 min
Apr 10, 10:55 PM CDT	Tornado Warning	AMA	Hansford	35 min
Apr 10, 11:06 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	54 min
Apr 10, 11:37 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	68 min
Apr 10, 11:46 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every 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.