Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 208, NWS Amarillo, TX

July 17, 2021Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 17, 2021, 3:45 PM CDT for Texas County, Oklahoma. It was in force for 60 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 17, 2021, 3:45 PM CDT (20:45 UTC)
Expired: Jul 17, 2021, 4:45 PM CDT
In force: 60 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Texas County, OK

The radar

The Amarillo radar (KAMA), 183 km from the middle of the area, began a volume at 20:49 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.

What was reported inside it

Time	Report	Where	Remark
Jul 17, 3:57 PM CDT	HAIL 1	6 N Eva, OK	MOSTLY DIME TO NICKEL SIZE WITH A FEW STONES UP TO THE SIZE OF QUARTERS. REPORTED BY COW CREEK FEEDERS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.8 hours before the alert went out and 183 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: 746 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

936 
WUUS54 KAMA 172045
SVRAMA
OKC139-172145-
/O.NEW.KAMA.SV.W.0208.210717T2045Z-210717T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
345 PM CDT Sat Jul 17 2021

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Texas County in the Panhandle of Oklahoma...

* Until 445 PM CDT.

* At 345 PM CDT, a severe thunderstorm was located 6 miles north of
  Eva, or 7 miles south of Elkhart, and is nearly stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to roofs, siding, and trees is possible. 
           Hail damage to vehicles is expected. Hail may accumulate 
           on roadways causing hazardous travel.

* Locations impacted include...
  Eva.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3694 10201 3697 10179 3677 10168 3672 10200
TIME...MOT...LOC 2045Z 347DEG 3KT 3689 10188 

HAIL...1.00IN
WIND...60MPH
 
$$

Guerrero

1 follow-up statement

643 
WWUS54 KAMA 172135
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
435 PM CDT Sat Jul 17 2021

OKC139-172145-
/O.EXP.KAMA.SV.W.0208.000000T0000Z-210717T2145Z/
Texas OK-
435 PM CDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN TEXAS COUNTY WILL
EXPIRE AT 445 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 3694 10201 3697 10179 3677 10168 3672 10200
TIME...MOT...LOC 2135Z 347DEG 3KT 3685 10187 

$$

Guerrero

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:29 AM CDT	Special Weather Statement	AMA	Texas	16 min
Jul 17, 5:45 AM CDT	Severe Thunderstorm Warning	AMA	Texas	30 min
Jul 17, 5:57 AM CDT	Areal Flood Advisory	AMA	Texas	2 hr
Jul 17, 9:05 AM CDT	Special Weather Statement	AMA	Texas	55 min
Jul 17, 1:41 PM CDT	Special Weather Statement	AMA	Cimarron	64 min
Jul 17, 2:40 PM CDT	Areal Flood Advisory	AMA	Cimarron	2 hr
Jul 17, 3:35 PM CDT	Special Weather Statement	AMA	Texas	55 min
Jul 17, 4:02 PM CDT	Severe Thunderstorm Warning	AMA	Texas	34 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.