Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 26, NWS Amarillo, TX

March 23, 2007Dallam County, Hartley County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Mar 23, 2007, 5:30 PM CDT for Dallam County, Hartley County, Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 23, 2007, 5:30 PM CDT (22:30 UTC)
Expired: Mar 23, 2007, 6:30 PM CDT
In force: 60 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

Counties Dallam County, TX, Hartley County, TX

The radar

The Amarillo radar (KAMA), 122 km from the middle of the area, began a volume at 22:31 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 23, 4:40 PM CDT	Tornado 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 123 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: 831 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 801 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.1

Open this sounding in Storm Lab

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 Mar 23, 4:25 PM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, Mar 23, 4:25 PM CDT, 1 hour 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
425 PM CDT FRI MAR 23 2007

.DISCUSSION...
THE ZONES FORECAST WILL BE A LITTLE TARDY TODAY DUE TO ONGOING
WEATHER BUT SHOULD BE OUT SHORTLY. STRONG INSTABILITY NOTED ON THE
18Z SOUNDING ALLOWING FOR SEVERE THUNDERSTORMS TO DEVELOP ALONG A
DEWPOINT DISCONTINUITY FROM ROUGHLY BEAVER TO TUCUMCARI. EXPECT
SUPERCELL DEVELOPMENT THROUGH THIS EVENING BEFORE LARGE SCALE FORCING
INCREASES TURNING THE SEVERE EVENT INTO POTENTIALLY A FLASH FLOOD
EVENT AS THUNDERSTORMS COALESCE INTO AN MCS AND TRAIN ACROSS THE
WESTERN CWA.

DID NOT CHANGE THE PREVIOUS FORECAST MUCH BUT DID LOWER POPS SOME SAT
NIGHT AND SUNDAY AS ALL MODELS NOW AGREE ON RAIN ENDING WITH THE
EJECTION OF THE UPPER LOW SATURDAY. ANOTHER UPPER LOW DEVELOPS IN THE
BASE OF THE TROUGH LEFT FROM THE DEPARTING LOW...HOWEVER IT WILL BE
WEAK AND SHOULD PASS TO THE SOUTH KEEPING MOST PRECIP OUT OF THE CWA.
THE EXTENDED FORECAST WAS LEFT AS IS WITH THE NEXT TROUGH THE MIDDLE
OF NEXT WEEK TOO FAR NORTH TO DO MUCH HERE.

HENNIG

&&

.PRELIMINARY POINT TEMPS/POPS...
AMARILLO TX                54  71  44  72  48 / 100  50  40  30  10
BEAVER OK                  60  71  47  75  51 / 100  70  40  20  10
BOISE CITY OK              46  67  42  72  42 / 100  50  30   5   5
BORGER TX                  58  72  49  73  50 / 100  60  40  20  10
BOYS RANCH TX              54  73  42  73  46 / 100  50  40  20   5
CANYON TX                  54  71  42  72  48 / 100  50  40  30  10
CLARENDON TX               57  74  49  71  51 /  90  60  40  30  10
DALHART TX                 50  71  38  71  42 / 100  50  30  10   5
GUYMON OK                  56  71  45  74  45 / 100  60  40  10   5
HEREFORD TX                51  68  42  69  45 / 100  40  40  30   5
LIPSCOMB TX                61  72  49  75  52 /  90  70  40  30  10
PAMPA TX                   57  71  49  70  49 / 100  60  40  30  10
SHAMROCK TX                59  73  50  71  52 /  90  60  40  30  10
WELLINGTON TX              59  75  53  72  53 /  90  60  40  30  10

&&

.AMA WATCHES/WARNINGS/ADVISORIES...
TX...FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR THE FOLLOWING
     ZONES: ARMSTRONG...CARSON...COLLINGSWORTH...DALLAM...DEAF
     SMITH...DONLEY...GRAY...HANSFORD...HARTLEY...HEMPHILL...
     HUTCHINSON...LIPSCOMB...MOORE...OCHILTREE...OLDHAM...
     POTTER...RANDALL...ROBERTS...SHERMAN...WHEELER.

OK...FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR THE FOLLOWING
     ZONES: BEAVER...CIMARRON...TEXAS.

&&

11/10

Hazardous weather outlook, Mar 23, 1:00 PM CDT, 4 hours 30 minutes before

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
100 PM CDT FRI MAR 23 2007

OKZ001>003-TXZ001>020-241100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
100 PM CDT FRI MAR 23 2007

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

.DAY ONE...

SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH TONIGHT ACROSS THE
PANHANDLES. THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN
WHICH COULD LEAD TO FLASH FLOODING. THEREFORE...A FLASH FLOOD WATCH
IS IN EFFECT FROM NOON CDT TODAY THROUGH SATURDAY MORNING FOR ALL OF
THE TEXAS AND OKLAHOMA PANHANDLES. IN ADDITION TO THE HEAVY RAIN
POTENTIAL...SEVERE THUNDERSTORMS MAY ALSO OCCUR PRODUCING LARGE
HAIL AND DAMAGING WINDS MAINLY THIS AFTERNOON AND EVENING.

SOUTH WINDS OF 15 TO 25 MPH WITH OCCASIONAL GUSTS WILL RESULT IN
CAUTION ON AREA LAKES THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORMS WILL CONTINUE THROUGH SUNDAY. SOME OF THE STORMS MAY
BE SEVERE WITH LARGE HAIL...DAMAGING WINDS AND LOCALIZED FLASH
FLOODING. THE GREATEST THREAT OF HEAVY RAIN WILL BE DURING THE EARLY
MORNING ON SATURDAY. THUNDERSTORMS WILL ALSO BE POSSIBLE WEDNESDAY
ACROSS EASTERN SECTIONS OF THE PANHANDLES. AT THIS TIME...SEVERE
THUNDERSTORMS ARE NOT EXPECTED WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS MAY BE ACTIVATED
IN ISOLATED AREAS THROUGH TONIGHT. WEATHER OBSERVERS ARE REQUESTED
TO CALL IN THEIR RAINFALL REPORTS TO THE NATIONAL WEATHER SERVICE IN
AMARILLO.

SCHNEIDER

In the hours before

Special weather statement, Mar 23, 3:49 PM CDT, 1 hour 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
349 PM CDT FRI MAR 23 2007

TXZ003-232130-
HANSFORD-
349 PM CDT FRI MAR 23 2007

...STRONG THUNDERSTORM OVER NORTHWESTERN HANSFORD COUNTY...

A STRONG THUNDERSTORM LOCATED OVER NORTHWESTERN HANSFORD COUNTY
JUST NORTHWEST OF GRUVER WILL MOVE NORTH NORTHEAST AT 30 MPH THROUGH
430 PM. THIS STORM WILL AFFECT LOCATIONS IN NORTHWEST HANSFORD COUNTY
THROUGH 430 PM AND WILL LIKELY PRODUCE DEADLY CLOUD TO GROUND
LIGHTNING...GUSTY WINDS OF 40 TO 50 MPH...AND ONE QUARTER TO ONE HALF
INCH SIZE HAIL. PEOPLE IN NORTHWEST HANSFORD COUNTY AND ESPECIALLY
IN AND AROUND GRUVER SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND BE READY TO MOVE TO SAFE SHELTER IF THREATENING
WEATHER CONDITIONS APPROACHES YOUR LOCATION OR A WARNING IS ISSUED.

SCHNEIDER

Local storm report, Mar 23, 4:15 PM CDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
415 PM CDT FRI MAR 23 2007

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

0405 PM     HAIL             13 NW GRUVER            36.39N 101.58W
03/23/2007  E1.50 INCH       HANSFORD           TX   PUBLIC

            LOTS OF SMALLER HAIL WITH SOME UP TO PING PONG SIZE.
            YARD WAS COVERED WITH HAIL.

&&

KJS

Special weather statement, Mar 23, 4:23 PM CDT, 1 hour 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
423 PM CDT FRI MAR 23 2007

OKZ003-232200-
BEAVER OK-
423 PM CDT FRI MAR 23 2007

...STRONG THUNDERSTORM IN CENTRAL BEAVER COUNTY...

AT 423 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR FORGAN MOVING NORTHEAST AT 35 MPH.

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

PEOPLE IN CENTRAL BEAVER COUNTY SHOULD MONITOR THE WEATHER SITUATION
CLOSELY...LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING
WEATHER CONDITIONS.

Local storm report, Mar 23, 4:43 PM CDT, 47 minutes before

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Local storm report, Mar 23, 5:10 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
510 PM CDT FRI MAR 23 2007

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

0510 PM     HAIL             ADAMS                   36.75N 101.08W
03/23/2007  M1.00 INCH       TEXAS              OK   TRAINED SPOTTER

&&

TAS

Local storm report, Mar 23, 5:15 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
515 PM CDT FRI MAR 23 2007

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

0505 PM     HAIL             ADAMS                   36.75N 101.08W
03/23/2007  E1.75 INCH       TEXAS              OK   PUBLIC

&&

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 3:52 AM CDT	Flash Flood Watch	AMA	Armstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more	32 hr
Mar 23, 10:46 AM CDT	Severe Thunderstorm Warning	AMA	Randall	59 min
Mar 23, 11:42 AM CDT	Severe Thunderstorm Warning	AMA	Potter	63 min
Mar 23, 1:28 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	62 min
Mar 23, 2:37 PM CDT	Severe Thunderstorm Warning	AMA	Moore	23 min
Mar 23, 3:16 PM CDT	Severe Thunderstorm Warning	AMA	Sherman	59 min
Mar 23, 3:57 PM CDT	Severe Thunderstorm Warning	AMA	Hansford	49 min
Mar 23, 6:30 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	60 min
Mar 23, 4:16 PM CDT	Severe Thunderstorm Warning	AMA	Texas	59 min
Mar 23, 5:11 PM CDT	Tornado Warning	AMA	Texas	41 min
Mar 23, 5:25 PM CDT	Tornado Warning	AMA	Beaver	35 min
Mar 23, 6:21 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	54 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

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.