Alert archive / Texas / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 8, NWS Amarillo, TX

April 17, 2005Carson County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 17, 2005, 8:25 PM CDT for Carson County, Texas. It was in force for 50 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 17, 2005, 8:25 PM CDT (01:25 UTC)
Expired: Apr 17, 2005, 9:15 PM CDT
In force: 50 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

County Carson County, TX

The radar

The Amarillo radar (KAMA), 34 km from the middle of the area, began a volume at 01:20 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 17, 3:20 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.4 hours before the alert went out and 33 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: 604 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1605 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KAMA 180126
SVRAMA
TXC065-180215-
/O.NEW.KAMA.SV.W.0008.050418T0125Z-050418T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
825 PM CDT SUN APR 17 2005

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

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

* UNTIL 915 PM CDT

* AT 825 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 8 MILES WEST OF PANHANDLE...AND MOVING EAST AT 40
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GROOM...WHITE DEER AND SKELLYTOWN.

LARGE HAIL AND VERY HEAVY RAINS ARE EXPECTED WITH THIS STORM. TAKE 
COVER IN A SUBSTANTIAL SHELTER. THIS STORM HAS A HISTORY OF 
PRODUCING LARGE DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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

LAT...LON 3554 10161 3519 10162 3519 10111 3561 10111

$$

1 follow-up statement

000 
WWUS54 KAMA 180141
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
840 PM CDT SUN APR 17 2005

TXC065-180215-
/O.CON.KAMA.SV.W.0008.000000T0000Z-050418T0215Z/
CARSON TX-
840 PM CDT SUN APR 17 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 915 PM CDT FOR
CARSON COUNTY...

AT 835 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
 THIS STORM WAS LOCATED NEAR PANHANDLE...MOVING EAST AT 30 MPH. AT 
835 PM...CARSON COUNTY SHERIFFS OFFICE REPORTED NICKEL SIZE HAIL IN 
THE CITY OF PANHANDLE.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GROOM...WHITE DEER AND SKELLYTOWN.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
SUNDAY EVENING FOR THE PANHANDLE OF OKLAHOMA AND THE PANHANDLE OF
TEXAS.

LAT...LON 3554 10161 3519 10162 3519 10111 3561 10111

$$

JORDAN

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 17, 1:30 PM CDT, 6 hours 55 minutes earlier.

Area forecast discussion, Apr 17, 1:30 PM CDT, 6 hours 55 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
130 PM CDT SUN APR 17 2005

.DISCUSSION...
MID LEVEL SHORT WAVE TROUGH CONTINUES TO SLOWLY PUSH NORTHEAST
ACROSS SOUTHEAST COLORADO THIS AFTERNOON. SOME SHOWERS/STORMS
HAVE TRIED TO GET GOING IN THE NORTH CENTRAL TEXAS PANHANDLE.
THESE SEEM TO BE SUPPORTED BY THE MID LEVEL VORT LOBE ROTATING
EAST THROUGH THE PANHANDLES NOW. MOST OF THE CONVECTION THAT
DEVELOPS THIS AFTERNOON ACROSS THE NORTHERN AND EASTERN CWA
WILL PROBABLY BE ELEVATED WITH THE VORT LOBE. MORE STORMS OVER
THE NEW MEXICO AND COLORADO MOUNTAINS SHOULD ROTATE THIS DIRECTION
THIS EVENING. THESE STORMS MAY HAVE A BETTER SHOT AT BECOMING
SEVERE SINCE THEY WILL BE ASSOCIATED WITH THE STRONGER MID LEVEL
WINDS AND THEY WILL BE ENCOUNTERING INCREASING MOISTURE AND A LOW
LEVEL JET ACROSS THE PANHANDLES THIS EVENING INTO THE OVERNIGHT.

NEXT SHORT WAVE IN THE SOUTHWEST FLOW ALOFT NEARS OUR AREA BY
MONDAY AFTERNOON. THIS WAVE HAS THE POTENTIAL ONCE AGAIN TO HELP
SPARK ANOTHER ROUND OF THUNDERSTORMS FOR THE PANHANDLES. HOWEVER...
HOW STRONG THEY GET WILL BE A FUNCTION ON HOW MUCH DAYTIME HEATING
WILL OCCUR OVER OUR AREA. LOW CLOUDS MAY BE SLOW TO ERODE ON MONDAY
AS PERSISTENT LOW LEVEL SOUTHEAST FLOW CONTINUES.

THE DRYLINE MAY HAVE A BETTER CHANCE AT MIXING EASTWARD ON TUESDAY
AS A COLD FRONT PUSHES SOUTH THROUGH THE CENTRAL PLAINS AND SURFACE
WINDS TEND TO A MORE SOUTHWESTERLY DIRECTION.

MODELS CONTINUE TO DIVERGE ON HOW TO HANDLE THE MOVEMENT OF THE
UPPER LOW WHICH DEVELOPS OVER THE ROCKIES BY MID WEEK. WILL
CONTINUE TO ONLY MAKE MINOR TWEAKS TO THE FORECAST BEYOND WEDNESDAY
AS CONFIDENCE IS LOW IN ANY ONE SOLUTION.

THANKS FOR THE COORDINATION DDC AND LUB.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMARILLO TX                52  77  50  77 /  50  20  20  20
BEAVER OK                  54  75  53  75 /  80  30  30  20
BOISE CITY OK              48  76  45  74 /  80  20  20  20
BORGER TX                  54  80  50  79 /  60  30  30  20
BOYS RANCH TX              52  80  48  80 /  50  20  20  20
CANYON TX                  52  79  50  78 /  50  20  20  20
CLARENDON TX               56  75  54  75 /  50  30  30  20
DALHART TX                 49  77  47  75 /  70  20  20  20
GUYMON OK                  54  80  49  76 /  80  30  30  20
HEREFORD TX                53  80  49  79 /  40  20  20  20
LIPSCOMB TX                56  75  55  74 /  80  30  30  20
PAMPA TX                   55  75  52  75 /  60  30  30  20
SHAMROCK TX                57  76  56  77 /  60  30  30  20
WELLINGTON TX              57  76  58  78 /  60  30  30  20

&&

.AMA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.

&&

17/15

Hazardous weather outlook, Apr 17, 12:53 PM CDT, 7 hours 32 minutes before

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
1253 PM CDT SUN APR 17 2005

OKZ001>003-TXZ001>020-181100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
1253 PM CDT SUN APR 17 2005

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

.DAY ONE...

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT
ACROSS ALL BUT THE FAR SOUTHEAST TEXAS PANHANDLE.  THE PRIMARY THREAT
WILL BE DOWNBURST WINDS AND HAIL.  LOW LEVEL MOISTURE WILL CONTINUE
TO INCREASE THROUGHOUT THE DAY AND A WEAK UPPER LEVEL LOW PRESSURE
SYSTEM WILL MOVE OVER THE REGION.  THESE TWO ITEMS WILL COMBINE TO
PROVIDING THE LIFT AND INSTABILITY NEEDED FOR THUNDERSTORMS TO
DEVELOP.  A FEW STORMS WILL DEVELOP ACROSS THE CENTRAL OKLAHOMA AND
TEXAS PANHANDLES THIS AFTERNOON...WITH ADDITIONAL DEVELOPMENT
EXPECTED ACROSS EASTERN NEW MEXICO. THE STORMS IN NEW MEXICO WILL
THEN MOVE INTO THE WESTERN TEXAS AND OKLAHOMA PANHANDLES LATER THIS
EVENING.

.DAYS TWO THROUGH SEVEN...

A SERIES OF MINOR UPPER LEVEL LOW PRESSURE SYSTEMS WILL LIKELY
AFFECT THE SOUTHERN HIGH PLAINS THROUGH THE MIDDLE OF THE WEEK. LOW
LEVEL MOISTURE WILL REMAIN IN PLACE ACROSS THE REGION...COMBINING
WITH THE LOW PRESSURE SYSTEMS TO HELP TO INITIATE THUNDERSTORMS EACH
DAY THROUGH THURSDAY...SOME OF WHICH COULD BECOME SEVERE ESPECIALLY
ON MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS AND EMERGENCY MANAGERS SHOULD BE READY FOR POSSIBLE
ACTIVATION LATER TODAY AND TONIGHT...AND SHOULD MONITOR WEATHER
CONDITIONS THROUGH THE MIDDLE OF THE WEEK.

JORDAN

In the hours before

Local storm report, Apr 17, 8:10 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
810 PM CDT SUN APR 17 2005

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

0809 PM     HAIL             BRYANS CORNER           36.62N 100.82W
04/17/2005  0.88 INCH        BEAVER             OK   EMERGENCY MNGR

&&

SD

Local storm report, Apr 17, 8:11 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
811 PM CDT SUN APR 17 2005

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

0800 PM     HAIL             5 W FORGAN              36.91N 100.63W
04/17/2005  1.50 INCH        BEAVER             OK   EMERGENCY MNGR

&&

SD

Local storm report, Apr 17, 8:12 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
812 PM CDT SUN APR 17 2005

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

0805 PM     HAIL             10 S TURPIN             36.73N 100.88W
04/17/2005  0.88 INCH        BEAVER             OK   TRAINED SPOTTER

            SPOTTER FROM HARDESTY CALLING IN REPORTS FROM OTHER
            SPOTTERS IN BEAVER COUNTY. SPOTTERS IN BEAVER REPORTING
            NICKEL HAIL.

&&

JJB

Local storm report, Apr 17, 8:17 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
817 PM CDT SUN APR 17 2005

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

0804 PM     HAIL             AMARILLO                35.20N 101.82W
04/17/2005  0.88 INCH        POTTER             TX   EMERGENCY MNGR

            DOWNTOWN INTERCHANGE

&&

SD

Local storm report, Apr 17, 8:20 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
820 PM CDT SUN APR 17 2005

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

0750 PM     HAIL             AMARILLO                35.20N 101.82W
04/17/2005  0.88 INCH        POTTER             TX   AMATEUR RADIO

            I-40 & GRAND

&&

JB

Local storm report, Apr 17, 8:22 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
822 PM CDT SUN APR 17 2005

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

0816 PM     FLASH FLOOD      AMARILLO                35.20N 101.82W
04/17/2005                   POTTER             TX   PUBLIC

            BLVD & GRAND ...SIGNIFICANT STREET FLOODING

&&

SMB

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, 8:30 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, 5:27 PM CDT	Severe Thunderstorm Warning	AMA	Potter	63 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.