Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Amarillo, TX

May 7, 2021Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 7, 2021, 3:58 PM CDT for Texas County, Oklahoma. It was in force for 32 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: May 7, 2021, 3:58 PM CDT (20:58 UTC)
Expired: May 7, 2021, 4:30 PM CDT
In force: 32 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Texas County, OK

The radar

The Dodge City radar (KDDC), 167 km from the middle of the area, began a volume at 21:02 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
May 7, 4:03 PM CDT	TSTM WND DMG	1 E Guymon, OK	DELAYED REPORT OF A LARGE TREE DOWNED IN THE CEMETERY.

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, 9.0 hours before the alert went out and 168 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: 1870 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 598 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

376 
WUUS54 KAMA 072058
SVRAMA
OKC139-072200-
/O.NEW.KAMA.SV.W.0035.210507T2058Z-210507T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
358 PM CDT Fri May 7 2021

The National Weather Service in Amarillo has issued a

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

* Until 500 PM CDT.

* At 357 PM CDT, a severe thunderstorm was located near Optima, or 5
  miles northeast of Guymon, moving east at 20 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to roofs, siding, and trees is possible.

* Locations impacted include...
  Guymon, Hooker, Optima, Hardesty and Adams. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3665 10151 3685 10151 3693 10107 3659 10108
      3660 10121
TIME...MOT...LOC 2057Z 267DEG 19KT 3674 10141 

HAIL...0.75IN
WIND...60MPH
 
$$

Guerrero

2 follow-up statements

351 
WWUS54 KAMA 072117
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
417 PM CDT Fri May 7 2021

OKC139-072200-
/O.CON.KAMA.SV.W.0035.000000T0000Z-210507T2200Z/
Texas OK-
417 PM CDT Fri May 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR NORTHEASTERN TEXAS COUNTY...

At 417 PM CDT, a severe thunderstorm was located 4 miles east of
Optima, or 11 miles east of Guymon, moving east at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to roofs, siding, and trees is possible.

Locations impacted include...
Hooker, Optima and Adams. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3667 10137 3687 10137 3693 10107 3662 10108
      3663 10122
TIME...MOT...LOC 2117Z 267DEG 19KT 3675 10127 

HAIL...0.75IN
WIND...60MPH
 
$$

Guerrero

798 
WWUS54 KAMA 072130
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
430 PM CDT Fri May 7 2021

OKC139-072140-
/O.CAN.KAMA.SV.W.0035.000000T0000Z-210507T2200Z/
Texas OK-
430 PM CDT Fri May 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TEXAS COUNTY IS
CANCELLED...
                
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 has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3667 10137 3687 10137 3693 10107 3662 10108
      3663 10122
TIME...MOT...LOC 2126Z 267DEG 19KT 3675 10118 

$$

Guerrero

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 1:23 PM CDT	Special Weather Statement	AMA	Cimarron	37 min
May 7, 1:33 PM CDT	Severe Thunderstorm Warning	AMA	Cimarron	57 min
May 7, 2:22 PM CDT	Special Weather Statement	AMA	Cimarron	23 min
May 7, 2:42 PM CDT	Fire Weather Watch	AMA	Cimarron	13 hr
May 7, 2:47 PM CDT	Special Weather Statement	AMA	Texas	28 min
May 7, 2:50 PM CDT	Severe Thunderstorm Warning	AMA	Texas	55 min
May 7, 3:27 PM CDT	Special Weather Statement	AMA	Cimarron	63 min
May 7, 3:42 PM CDT	Special Weather Statement	AMA	Texas	33 min
May 7, 3:53 PM CDT	Special Weather Statement	AMA	Cimarron	67 min
May 7, 4:49 PM CDT	Special Weather Statement	AMA	Beaver	56 min
May 7, 4:55 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	46 min
May 7, 5:43 PM CDT	Special Weather Statement	AMA	Beaver	32 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.