Alert archive / Texas / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 13, NWS Amarillo, TX

April 18, 2005Potter County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 18, 2005, 5:27 PM CDT for Potter County, Texas. It was in force for 63 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 18, 2005, 5:27 PM CDT (22:27 UTC)
Expired: Apr 18, 2005, 6:30 PM CDT
In force: 63 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), 36 km from the middle of the area, began a volume at 22:28 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 18, 3:10 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.5 hours before the alert went out and 37 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: 59 J/kg
Mixed-layer CIN: -319 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 237 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 182228
SVRAMA
TXC375-182330-
/O.NEW.KAMA.SV.W.0013.050418T2227Z-050418T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
527 PM CDT MON APR 18 2005

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

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

* UNTIL 630 PM CDT

* AT 524 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR VALLEY DE ORO...OR ABOUT 20 MILES NORTHEAST
  OF VEGA...AND MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

THIS STORM HAS A HISTORY OF PRODUCING HAIL GREATER THAN QUARTER 
SIZE. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY 
FROM WINDOWS

SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. IF 
THREATENING WEATHER APPROACHES...EXERCISE SAFETY PRECAUTIONS.

TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE
AT 8 0 6 3 3 5 1 1 2 1.

LAT...LON 3562 10216 3523 10214 3540 10163 3562 10164

$$

KRAMAR

2 follow-up statements

000 
WWUS54 KAMA 182247
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
546 PM CDT MON APR 18 2005

TXC375-182330-
/O.CON.KAMA.SV.W.0013.000000T0000Z-050418T2330Z/
POTTER TX-
546 PM CDT MON APR 18 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 630 PM CDT FOR
POTTER COUNTY...

AT 541 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. AT 
540 PM...GOLF BALL SIZE HAIL WAS REPORTED AT VALLEY DE ORO.  THIS 
STORM WAS LOCATED 7 MILES NORTHEAST OF VALLEY DE ORO...OR ABOUT 23 
MILES SOUTH OF DUMAS...MOVING NORTHEAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR THE PANHANDLE OF OKLAHOMA AND THE PANHANDLE OF
TEXAS.

LAT...LON 3562 10216 3523 10214 3540 10163 3562 10164

$$

JC

000 
WWUS54 KAMA 182330
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
630 PM CDT MON APR 18 2005

TXC375-182340-
/O.EXP.KAMA.SV.W.0013.000000T0000Z-050418T2330Z/
POTTER TX-
630 PM CDT MON APR 18 2005

...THE SEVERE THUNDERSTORM WARNING FOR POTTER COUNTY HAS BEEN 
ALLOWED TO EXPIRE AT 630 PM CDT...

THE STORM THAT PROMPTED THE WARNING HAD WEAKENED BELOW SEVERE LEVELS.

LAT...LON 3562 10216 3523 10214 3540 10163 3562 10164

$$

KRAMAR

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 18, 3:30 PM CDT, 1 hour 57 minutes earlier.

Area forecast discussion, Apr 18, 3:30 PM CDT, 1 hour 57 minutes before

AREA FORECAST DISCUSSION...UPDATED FOR SVR TSTM WATCH 190 AND RADAR
NATIONAL WEATHER SERVICE AMARILLO TX
330 PM CDT MON APR 18 2005

.DISCUSSION...
STILL TRYING TO RECOVER FROM LAST NIGHTS SEVERE WEATHER ACROSS THE
REGION WITH THE POSSIBILITY OF SEVERE WEATHER AGAIN TONIGHT.  DRYLINE
HAS NOT MIXED AS FAR EAST AS MODELS HAVE DEPICTED AND ALREADY
STARTING TO SEE CONVECTION DEVELOP ACROSS THE FAR SOUTHWEST TEXAS
PANHANDLE.  DID BUMP UP POPS TO 30 PERCENT ALL AREAS AND ADDED
MENTION OF SEVERE ALL AREAS.  MORE CLEARING NOW THAN THIS TIME
YESTERDAY AND MODELS STILL HAVE GOOD INSTABILITY OVER THE REGION.
SHEAR PROFILE IS NOT QUITE AS FAVORABLE AS YESTERDAY BUT STILL ENOUGH
TO GET SOME OF THE STORMS TO ORGANIZE.  WILL HAVE TO WAIT AND SEE HOW
THINGS GO AND WILL HOLD OFF ISSUING ROUTINE PRODUCTS UNTIL LAST
MINUTE IN CASE ANY WATCHES GET ISSUED.  OTHERWISE...GRIDS/FCST FOR
OTHER WEATHER ELEMENTS APPEAR IN GOOD SHAPE THROUGH TOMORROW WITH
LITTLE OR NO CHANGES.

DID BUMP UP TEMPS MIDWEEK AS MODELS STILL INDICATING FLOW WILL REMAIN
OUT OF THE SOUTHWEST KEEPING THINGS A BIT WARMER AS OPPOSED TO
BRINGING A FRONT THROUGH.  WILL ALSO HAVE TO WAIT AND SEE ABOUT POP
CHANCES AS MODELS CONTINUE TO TRY AND SCOUR OUT MOISTURE TO THE
EASTERN PORTIONS OF THE PANHANDLES.  dGut/dT RIGHT NOW IS
NEUTRAL...MEANING THAT MOISTURE WILL LIKELY HOLD A BIT FURTHER
WEST THAN MODELS HAVE DEPICTED BUT WILL HOLD OF MAKING MAJOR CHANGES.
LOCATION OF THE DRYLINE/TROF/DISCONTINUITY SETS UP WILL LIKELY
DETERMINE WHERE BEST POP CHANCES WILL BE LATER IN THE WEEK.  DEALING
WITH AWIPS ISSUES HAS PREVENTED DETAILED ANALYSIS FOR EXTENDED GRIDS
SO LEFT ALONE FOR NOW.

FYI...RADAR PART HAS ARRIVED AND WE WILL BE RUNNING SHORTLY.  WILL
HAVE TO KEEP AN EYE ON IT AND MAKE SURE CALIBRATIONS ARE CORRECT...
BUT WSR-88D SHOULD BE GOOD TO GO WITHIN THE HOUR.

FCSTID = JORDAN

&&

.PRELIMINARY POINT TEMPS/POPS...
AMARILLO TX                79  50  81  51 /  30  30  20  20
BEAVER OK                  81  53  84  52 /  30  30  30  30
BOISE CITY OK              79  45  80  46 /  30  30  20  20
BORGER TX                  81  50  83  51 /  30  30  20  20
BOYS RANCH TX              81  48  82  47 /  30  30  20  20
CANYON TX                  81  51  82  50 /  30  30  20  20
CLARENDON TX               79  54  83  55 /  30  30  20  20
DALHART TX                 79  47  79  46 /  30  30  20  20
GUYMON OK                  82  49  82  49 /  30  30  20  20
HEREFORD TX                81  49  82  48 /  30  30  20  20
LIPSCOMB TX                79  54  84  54 /  30  30  30  30
PAMPA TX                   78  52  82  54 /  30  30  20  20
SHAMROCK TX                79  56  83  55 /  40  40  30  30
WELLINGTON TX              79  58  82  56 /  40  40  30  30

&&

.AMA WATCHES/WARNINGS/ADVISORIES...
OK...SEVERE THUNDERSTORM WATCH 190 IN EFFECT UNTIL 10 PM CDT FOR
     TEXAS AND BEAVER COUNTIES.
TX...SEVERE THUNDERSTORM WATCH 190 IN EFFECT UNTIL 10 PM CDT FOR
     SHERMAN...HANSFORD...OCHILTREE...LIPSCOMB...MOORE...
     HUTCHINSON...ROBERTS...HEMPHILL...OLDHAM...POTTER...CARSON...
     GRAY...WHEELER...DEAF SMITH...RANDALL...ARMSTRONG...DONLEY...AND
     COLLINGSWORTH.

&&

03/17

Hazardous weather outlook, Apr 18, 2:31 PM CDT, 2 hours 56 minutes before

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AMARILLO TX
231 PM CDT MON APR 18 2005

OKZ001>003-TXZ001>020-191100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
231 PM CDT MON APR 18 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA
PANHANDLES.

.DAY ONE...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER ALL OF TEXAS AND
OKLAHOMA PANHANDLES THIS AFTERNOON AND TONIGHT. THE MAIN SEVERE
WEATHER THREAT WILL BE LARGE HAIL AND DAMAGING WINDS.

THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE DRYLINE OVER
EASTERN NEW MEXICO THIS AFTERNOON. THE THUNDERSTORMS WILL HAVE THE
POTENTIAL TO INTENSIFY AS THEY MOVE EASTWARD ACROSS THE PANHANDLES.

ALSO...BREEZY SOUTH WINDS ARE EXPECTED TODAY. THUS...CAUTION IS
ADVISED ON AREA LAKES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM CHANCES WILL REMAIN IN THE FORECAST THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS AND EMERGENCY MANAGERS IN THE SLIGHT RISK AREA SHOULD
REMAIN ALERT AND BE READY FOR POSSIBLE ACTIVATION THIS AFTERNOON AND
TONIGHT.

COCKRELL

In the hours before

Special weather statement, Apr 18, 4:17 PM CDT, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
417 PM CDT MON APR 18 2005

TXZ006-011-182145-
HARTLEY TX-OLDHAM TX-
417 PM CDT MON APR 18 2005

...STRONG THUNDERSTORMS IN HARTLEY AND OLDHAM COUNTIES...

A STRONG THUNDERSTORM WAS LOCATED 6 MILES SOUTHEAST OF CHANNING AT
417 PM CDT...MOVING NORTHEAST AT 15 MPH. OTHER STRONG THUNDERSTORMS
WERE 5 TO 10 MILES WEST OF BOYS RANCH...MOVING NORTHEAST AT 20 MPH.

HAIL...STRONG WINDS...AND VERY HEAVY RAINFALL ARE POSSIBLE WITH THIS
STORM.

Special weather statement, Apr 18, 4:38 PM CDT, 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
438 PM CDT MON APR 18 2005

TXZ011-016-182215-
DEAF SMITH TX-OLDHAM TX-
438 PM CDT MON APR 18 2005

...STRONG THUNDERSTORM IN DEAF SMITH AND OLDHAM COUNTIES...

A STRONG THUNDERSTORM WAS LOCATED 7 MILES SOUTH OF VEGA AT 438 PM
CDT...MOVING NORTHEAST AT 15 MPH.

ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

Local storm report, Apr 18, 4:40 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
440 PM CDT MON APR 18 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0439 PM     HAIL             19 N HEREFORD           35.10N 102.40W
04/18/2005  0.88 INCH        DEAF SMITH         TX   TRAINED SPOTTER

            MADE CALL TO SPOTTER WHO REPORTED NICKLE HAIL.

&&

MK

Special weather statement, Apr 18, 5:09 PM CDT, 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
509 PM CDT MON APR 18 2005

TXZ002-007-182245-
MOORE TX-SHERMAN TX-
509 PM CDT MON APR 18 2005

...STRONG THUNDERSTORM IN MOORE AND SHERMAN COUNTIES...

A STRONG THUNDERSTORM WAS LOCATED 7 MILES NORTHEAST OF SUNRAY AT 509
PM CDT...MOVING NORTHEAST AT 20 MPH.

HAIL...STRONG WINDS...AND VERY HEAVY RAINFALL ARE POSSIBLE WITH THIS
STORM.

Local storm report, Apr 18, 5:13 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
513 PM CDT MON APR 18 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0510 PM     HAIL             3 N VEGA                35.29N 102.43W
04/18/2005  1.00 INCH        OLDHAM             TX   AMATEUR RADIO

            HAM RADIO OPERATOR AND STORM SPOTTER REPORTED QUARTER
            HAIL JUST NORTH OF VEGA

&&

JJB

Special weather statement, Apr 18, 5:22 PM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
522 PM CDT MON APR 18 2005

TXZ012-182245-
POTTER TX-
522 PM CDT MON APR 18 2005

...STRONG THUNDERSTORM IN POTTER COUNTY...

A STRONG THUNDERSTORM WAS LOCATED 3 MILES SOUTHWEST OF VALLEY DE ORO
AT 522 PM CDT...MOVING NORTHEAST AT 25 MPH.

ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 7:43 PM CDT	Severe Thunderstorm Warning	AMA	Potter, Randall	62 min
Apr 17, 7:59 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith	31 min
Apr 17, 8:15 PM CDT	Flash Flood Warning	AMA	Potter, Randall	90 min
Apr 17, 8:23 PM CDT	Severe Thunderstorm Warning	AMA	Carson	52 min
Apr 17, 8:25 PM CDT	Severe Thunderstorm Warning	AMA	Carson	50 min
Apr 17, 8:30 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith	45 min
Apr 17, 9:23 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	52 min
Apr 17, 9:52 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	38 min
Apr 18, 4:41 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	64 min
Apr 18, 6:21 PM CDT	Severe Thunderstorm Warning	AMA	Donley	54 min

Nearby

Severe Thunderstorm Warnings in Texas, 2005 Every severe thunderstorm warning in 2005

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.