Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 235, NWS Amarillo, TX

October 21, 2015Beaver County, Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Oct 21, 2015, 4:17 PM CDT for Beaver County, Texas County, Oklahoma. It was in force for 43 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: Oct 21, 2015, 4:17 PM CDT (21:17 UTC)
Expired: Oct 21, 2015, 5:00 PM CDT
In force: 43 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Beaver County, OK, Texas County, OK

The radar

The Dodge City radar (KDDC), 144 km from the middle of the area, began a volume at 21:19 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.3 hours before the alert went out and 181 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 677 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -45 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Oct 21, 4:03 PM CDT, 14 minutes earlier.

Area forecast discussion, Oct 21, 4:03 PM CDT, 14 minutes before

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Hazardous weather outlook, Oct 21, 3:16 PM CDT, 1 hour 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
316 PM CDT WED OCT 21 2015

OKZ001>003-TXZ001>020-220830-
CIMARRON-TEXAS-BEAVER-DALLAM-SHERMAN-HANSFORD-OCHILTREE-LIPSCOMB-
HARTLEY-MOORE-HUTCHINSON-ROBERTS-HEMPHILL-OLDHAM-POTTER-CARSON-
GRAY-WHEELER-DEAF SMITH-RANDALL-ARMSTRONG-DONLEY-COLLINGSWORTH-
316 PM CDT WED OCT 21 2015

...FLASH FLOOD WATCH IS IN EFFECT THROUGH THURSDAY NIGHT...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NUMEROUS TO WIDESPREAD THUNDERSTORMS HAVE DEVELOPED THIS AFTERNOON
AND WILL CONTINUE ACROSS THE TEXAS AND OKLAHOMA PANHANDLES.  A FEW
STORMS COULD BECOME STRONG TO SEVERE THIS AFTERNOON AND TONIGHT...WITH
HAIL UP TO PING PONG SIZE AND WIND GUSTS UP TO 60 MPH POSSIBLE
ESPECIALLY ACROSS THE WESTERN TEXAS PANHANDLE. HEAVY RAINFALL IS
EXPECTED ACROSS THE PANHANDLES TODAY...LEADING TO THE POTENTIAL FOR
FLOODING OR FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THUNDERSTORMS ARE EXPECTED THURSDAY AND THURSDAY NIGHT ACROSS THE
TEXAS AND OKLAHOMA PANHANDLES...WITH THE GREATEST CHANCES BEING
ACROSS THE EASTERN HALF OF THE PANHANDLES. WIDESPREAD HEAVY RAINFALL
IS EXPECTED...WHICH COULD LEAD TO FLOODING OR FLASH FLOODING. NO
ORGANIZED SEVERE WEATHER IS EXPECTED WITH THESE STORMS.

THERE IS ALSO A SLIGHT CHANCE FOR THUNDERSTORMS ACROSS PORTIONS OF
THE TEXAS AND OKLAHOMA PANHANDLES ON TUESDAY...THOUGH NO SEVERE
WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

LIMITED SPOTTER ACTIVATION MAY BE REQUIRED THROUGH THURSDAY NIGHT.
PLEASE DIRECT ANY RAINFALL REPORTS AND REPORTS OF SEVERE WEATHER OR
FLOODING TO THE NATIONAL WEATHER SERVICE IN AMARILLO.

In the hours before

Special weather statement, Oct 21, 1:49 PM CDT, 2 hours 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
149 PM CDT WED OCT 21 2015

TXZ006-011-211915-
OLDHAM TX-HARTLEY TX-
149 PM CDT WED OCT 21 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HARTLEY AND CENTRAL
OLDHAM COUNTIES UNTIL 215 PM CDT...

AT 149 PM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES SOUTHEAST OF ROMERO
TO 8 MILES NORTHEAST OF SIMMS...AND MOVING NORTHEAST AT 35 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
ADRIAN AND ROMERO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3580 10304 3595 10271 3531 10236 3519 10265
      3519 10273 3562 10299 3562 10300 3563 10300
      3569 10304
TIME...MOT...LOC 1849Z 242DEG 29KT 3561 10286 3513 10257

CE

Special weather statement, Oct 21, 2:16 PM CDT, 2 hours 1 minute before

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Special weather statement, Oct 21, 2:46 PM CDT, 1 hour 31 minutes before

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Special weather statement, Oct 21, 3:17 PM CDT, 1 hour before

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Special weather statement, Oct 21, 3:57 PM CDT, 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
357 PM CDT WED OCT 21 2015

TXZ002-007-212130-
SHERMAN TX-MOORE TX-
357 PM CDT WED OCT 21 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SHERMAN AND NORTHWESTERN
MOORE COUNTIES UNTIL 430 PM CDT...

AT 356 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
CACTUS...OR 11 MILES NORTH OF DUMAS...MOVING NORTHEAST AT 30 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
DUMAS...CACTUS AND SUNRAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3611 10162 3586 10193 3599 10211 3633 10212
TIME...MOT...LOC 2056Z 205DEG 28KT 3603 10197

MB

Special weather statement, Oct 21, 4:13 PM CDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
413 PM CDT WED OCT 21 2015

OKZ002-212200-
TEXAS OK-
413 PM CDT WED OCT 21 2015

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN TEXAS COUNTY UNTIL 500 PM
CDT...

AT 412 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7
MILES WEST OF HARDESTY...OR 9 MILES EAST OF GUYMON...MOVING NORTHEAST
AT 30 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
HOOKER...OPTIMA...HARDESTY...ADAMS AND BAKER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3686 10095 3681 10095 3653 10125 3661 10146
      3700 10138 3700 10126
TIME...MOT...LOC 2112Z 205DEG 27KT 3664 10132

MB

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 21, 2:18 AM CDT	Areal Flood Advisory	AMA	Potter, Randall	4 hr
Oct 21, 11:32 AM CDT	Special Weather Statement	AMA	Deaf Smith	28 min
Oct 21, 12:00 PM CDT	Special Weather Statement	AMA	Deaf Smith	30 min
Oct 21, 12:32 PM CDT	Special Weather Statement	AMA	Oldham	28 min
Oct 21, 12:41 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	64 min
Oct 21, 12:43 PM CDT	Areal Flood Advisory	AMA	Deaf Smith, Oldham	3 hr
Oct 21, 1:49 PM CDT	Special Weather Statement	AMA	Oldham	26 min
Oct 21, 2:16 PM CDT	Special Weather Statement	AMA	Hartley, Oldham	29 min
Oct 21, 2:46 PM CDT	Special Weather Statement	AMA	Hartley, Potter	29 min
Oct 21, 3:17 PM CDT	Special Weather Statement	AMA	Moore	28 min
Oct 21, 3:40 PM CDT	Areal Flood Advisory	AMA	Deaf Smith, Hartley, Moore, Oldham, Potter	3 hr
Oct 21, 3:57 PM CDT	Special Weather Statement	AMA	Sherman	33 min
Oct 21, 4:08 PM CDT	Severe Thunderstorm Warning	AMA	Sherman	37 min
Oct 21, 4:40 PM CDT	Special Weather Statement	AMA	Sherman	50 min
Oct 21, 4:49 PM CDT	Areal Flood Advisory	AMA	Hansford, Sherman	3 hr
Oct 21, 6:34 PM CDT	Areal Flood Advisory	AMA	Hansford, Ochiltree	116 min
Oct 21, 4:13 PM CDT	Special Weather Statement	AMA	Texas	47 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015 Every severe thunderstorm warning in 2015

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.