Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 183, NWS Amarillo, TX

May 31, 2007Beaver County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 31, 2007, 10:44 PM CDT for Beaver County, Oklahoma. It was in force for 42 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: May 31, 2007, 10:44 PM CDT (03:44 UTC)
Expired: May 31, 2007, 11:26 PM CDT
In force: 42 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

County Beaver County, OK

The radar

The Dodge City radar (KDDC), 121 km from the middle of the area, began a volume at 03:47 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
May 31, 9:38 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 3.7 hours before the alert went out and 124 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: 1853 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1277 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.4

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 May 31, 6:46 PM CDT, 3 hours 58 minutes earlier.

Area forecast discussion, May 31, 6:46 PM CDT, 3 hours 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
646 PM CDT THU MAY 31 2007

.AVIATION...
AN UPPER TROUGH MOVING EAST OUT OF NEW MEXICO AND COLORADO WILL
SPREAD SCATTERED STRONG TO SEVERE CONVECTION ACROSS ALL THREE TAF
SITES THROUGH 06Z FRIDAY. IFR TO MVFR CONDITIONS EXPECTED IN AND NEAR
THE CONVECTION WITH VFR OUTSIDE THE CONVECTION. WINDS WILL BE
VARIABLE AND STRONG IN AND NEAR THE CONVECTION AT 30 TO 40 KNOTS WITH
GUSTS UP TO 50 KNOTS. OUTSIDE THE STORMS...SOUTHERLY TO SOUTHEASTERLY
WINDS OF 10 TO 20 KNOTS WITH OCCASIONAL GUSTS UP TO 30 KNOTS CAN BE
EXPECTED THROUGH FRIDAY MORNING. ADDITIONAL CONVECTION MAY DEVELOP
FRIDAY AFTERNOON AFTER 20Z.

SCHNEIDER

&&

.PREV DISCUSSION... /ISSUED 315 PM CDT THU MAY 31 2007/

DISCUSSION...
18Z RAOB FROM AMA SHOWS DEEPENING OF MOISTURE...ELEVATION OF CAPPING
INVERSION...TOPPED BY STEEP LAPSE RATES.  TSTMS DEVELOPING AT THIS
TIME NEAR NWRN CORNER OF FCST AREA...WHERE MID-LVL INSTBY IS
INCREASING NEAR LOW-LVL CONVERGENCE ZONE.  HAVE INCREASED POPS
SLIGHTLY TNGT...STILL CALLING FOR SCATTERED TO NUMEROUS TSTMS...
WITH SEVERE TSTMS POSSIBLE.  DEEP...RICH MSTR ALSO RESIDING S OF TX
PNHDL IS POISED TO MOVE NWD...WITH OLD FRONTAL BNDRY ALSO PROVIDING
A FOCUS FOR CONVERGENCE AND ENHANCED SHEAR.  ON FRI AND FRI NGT...
HAVE REORIENTED POPS...WITH HIGHEST POPS IN SRN ZONES...AS NEW COLD
FRONT EXPECTED TO LIE ACROSS THIS AREA DURING AFTERNOON AND EVE.
HAVE KEPT LOW POPS SAT THRU SUN NGT...AS NW FLOW PERSISTS WITH
UNSTABLE AIRMASS REMAINING OVERHEAD.  BY EARLY NEXT WEEK...FLOW
BECOMES MORE ZONAL...WITH DRIER SWLY LOW-LVL WINDS...WARMER
CONDITIONS...AND LESS LIKELIHOOD OF TSTMS.

COCKRELL

&&

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

&&

11

Hazardous weather outlook, May 31, 9:49 PM CDT, 55 minutes before

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AMARILLO TX
949 PM CDT THU MAY 31 2007

OKZ001>003-TXZ001>020-011100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
949 PM CDT THU MAY 31 2007

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

.DAY ONE...

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 5 AM FRIDAY
MORNING FOR THE EASTERN OKLAHOMA PANHANDLE AND THE EASTERN HALF
OF THE TEXAS PANHANDLE...

SEVERE THUNDERSTORMS ARE ANTICIPATED THE REST OF TONIGHT IN THE WATCH
AREA. LARGE HAIL...DAMAGING WINDS...AND HEAVY RAIN WILL BE THE
PRIMARY SEVERE WEATHER THREATS. IN ADDITION...NON SEVERE
THUNDERSTORMS WILL BE POSSIBLE ACROSS MUCH OF THE WESTERN AND CENTRAL
OKLAHOMA PANHANDLE...AS WELL AS THE WESTERN HALF OF THE TEXAS
PANHANDLE THE REMAINDER OF TONIGHT.

.DAYS TWO THROUGH SEVEN...

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE TEXAS AND OKLAHOMA
PANHANDLES THROUGH SUNDAY NIGHT...AND THEN AGAIN MONDAY NIGHT. SOME
STORMS MAY BECOME SEVERE FRIDAY AND AGAIN ON SATURDAY DURING THE
AFTERNOON AND EVENING HOURS...WITH THE MAIN THREATS BEING LARGE HAIL
AND DAMAGING WINDS. ALSO...THE THREAT OF LOCALLY HEAVY RAINFALL WILL
CONTINUE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS ACROSS THE EASTERN
OKLAHOMA PANHANDLE AND THE EASTERN HALF OF THE TEXAS PANHANDLE
SHOULD REMAIN ALERT AND BE READY FOR ACTIVATION TONIGHT.

ANDRADE

In the hours before

Local storm report, May 31, 9:37 PM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
937 PM CDT THU MAY 31 2007

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

0936 PM     HAIL             6 SW GRUVER             36.20N 101.49W
05/31/2007  E0.88 INCH       HANSFORD           TX   AMATEUR RADIO

            NEAR COUNTY ROAD 7 AND FARM TO MARKET ROAD 2018

&&

RN

Local storm report, May 31, 9:52 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
952 PM CDT THU MAY 31 2007

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

0946 PM     HAIL             3 N MORSE               36.11N 101.47W
05/31/2007  E1.25 INCH       HANSFORD           TX   AMATEUR RADIO

            HALF DOLLAR SIZE HAIL ACCORDING TO LAW ENFORCEMENT

&&

RN

Local storm report, May 31, 10:08 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1008 PM CDT THU MAY 31 2007

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

0845 PM     TSTM WND DMG     GUYMON                  36.69N 101.48W
05/31/2007                   TEXAS              OK   EMERGENCY MNGR

            DAMAGE OCCURRED OVER THE SOUTH SIDE OF GUYMON MAINLY
            ALONG SW 5TH ST...A TWO CAR GARAGE WAS
            DESTROYED...DUMPSTERS WERE FLIPPED...FENCES DOWN

&&

RN

Local storm report, May 31, 10:26 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1026 PM CDT THU MAY 31 2007

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

1005 PM     HAIL             4 ENE SUNRAY            36.04N 101.76W
05/31/2007  M2.75 INCH       MOORE              TX   TRAINED SPOTTER

&&

TAS

Local storm report, May 31, 10:29 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1029 PM CDT THU MAY 31 2007

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

0955 PM     HAIL             14 WNW MORSE            36.14N 101.71W
05/31/2007  E1.75 INCH       SHERMAN            TX   LAW ENFORCEMENT

            GOLFBALL SIZE HAIL

&&

RN

Local storm report, May 31, 10:42 PM CDT, 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:00 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	60 min
May 31, 7:32 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong	58 min
May 31, 7:47 PM CDT	Tornado Warning	AMA	Dallam, Hartley	43 min
May 31, 8:20 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Gray	28 min
May 31, 9:21 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Sherman	54 min
May 31, 9:52 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	53 min
May 31, 10:03 PM CDT	Tornado Warning	AMA	Moore	27 min
May 31, 10:15 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Sherman	60 min
May 31, 10:41 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	79 min
May 31, 10:59 PM CDT	Severe Thunderstorm Warning	AMA	Ochiltree	49 min
Jun 1, 7:37 AM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore	53 min
Jun 1, 8:28 AM CDT	Severe Thunderstorm Warning	AMA	Moore	62 min
Jun 1, 9:50 AM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Potter	40 min
Jun 1, 1:01 PM CDT	Severe Thunderstorm Warning	AMA	Oldham	34 min
Jun 1, 1:10 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	65 min
Jun 1, 6:07 PM CDT	Severe Thunderstorm Warning	AMA	Oldham	53 min
Jun 1, 6:57 PM CDT	Severe Thunderstorm Warning	AMA	Oldham	63 min
May 31, 7:07 PM CDT	Severe Thunderstorm Warning	AMA	Texas	53 min
May 31, 7:16 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	59 min
May 31, 7:18 PM CDT	Tornado Warning	AMA	Texas	42 min
May 31, 7:58 PM CDT	Tornado Warning	AMA	Texas	32 min
May 31, 8:29 PM CDT	Tornado Warning	AMA	Texas	31 min
May 31, 8:58 PM CDT	Severe Thunderstorm Warning	AMA	Texas	62 min
May 31, 9:47 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	58 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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.