Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Amarillo, TX

April 16, 2015Beaver County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 16, 2015, 11:40 AM CDT for Beaver County, Oklahoma. It was in force for 35 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 16, 2015, 11:40 AM CDT (16:40 UTC)
Expired: Apr 16, 2015, 12:15 PM CDT
In force: 35 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Beaver County, OK

The radar

The Dodge City radar (KDDC), 93 km from the middle of the area, began a volume at 16:42 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

Dodge City, (KDDC), launched 12:00Z, 4.7 hours before the alert went out and 96 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: 283 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1583 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

671 
WUUS54 KAMA 161640
SVRAMA
OKC007-161715-
/O.NEW.KAMA.SV.W.0021.150416T1640Z-150416T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
1140 AM CDT THU APR 16 2015

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BEAVER COUNTY IN THE PANHANDLE OF OKLAHOMA...

* UNTIL 1215 PM CDT

* AT 1138 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES WEST OF
  KNOWLES...AND MOVING NORTHEAST AT 35 MPH.

  HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
           DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. MINOR
           WIND DAMAGE TO ROOFS...SIDING AND TREES IS POSSIBLE.

* LOCATIONS IMPACTED INCLUDE...
  KNOWLES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3700 9999 3697 10000 3674 10024 3683 10049
      3701 10048 3701 10000
TIME...MOT...LOC 1640Z 211DEG 30KT 3688 10031

HAIL...1.50IN
WIND...60MPH

$$

BRB

2 follow-up statements

220 
WWUS54 KAMA 161655
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1155 AM CDT THU APR 16 2015

OKC007-161715-
/O.CON.KAMA.SV.W.0021.000000T0000Z-150416T1715Z/
BEAVER OK-
1155 AM CDT THU APR 16 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
BEAVER COUNTY UNTIL 1215 PM CDT...

AT 1153 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR KNOWLES...AND
MOVING NORTHEAST AT 20 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. MINOR WIND
         DAMAGE TO ROOFS...SIDING AND TREES IS POSSIBLE.

* LOCATIONS IMPACTED INCLUDE...
  KNOWLES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3700 9999 3697 10000 3677 10021 3685 10045
      3701 10040 3701 10000
TIME...MOT...LOC 1654Z 212DEG 17KT 3690 10027

HAIL...1.50IN
WIND...60MPH

$$

BRB

388 
WWUS54 KAMA 161715
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1215 PM CDT THU APR 16 2015

OKC007-161723-
/O.EXP.KAMA.SV.W.0021.000000T0000Z-150416T1715Z/
BEAVER OK-
1215 PM CDT THU APR 16 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BEAVER COUNTY
WILL EXPIRE AT 1215 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER...SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM. 
ADDITIONAL SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON.  

LAT...LON 3700 9999 3697 10000 3677 10021 3685 10045
      3701 10040 3701 10000
TIME...MOT...LOC 1713Z 212DEG 17KT 3698 10021

$$

BRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:54 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	50 min
Apr 15, 11:23 PM CDT	Special Weather Statement	AMA	Beaver, Texas	52 min
Apr 16, 2:34 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	56 min
Apr 16, 3:36 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	54 min
Apr 16, 4:58 PM CDT	Special Weather Statement	AMA	Beaver	32 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.