Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 211, NWS Norman, OK

May 17, 2021Baylor County, Knox County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 17, 2021, 7:00 PM CDT for Baylor County, Knox County, Texas. It was in force for 45 min. 3 reports 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 17, 2021, 7:00 PM CDT (00:00 UTC)
Expired: May 17, 2021, 7:45 PM CDT
In force: 45 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 2.0 in
Wind: 60.0 mph

Counties Baylor County, TX, Knox County, TX

The radar

The Dyess AFB radar (KDYX), 115 km from the middle of the area, began a volume at 00:02 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 17, 7:24 PM CDT	HAIL 1	2 S Munday, TX	FROM NWS CHAT.
May 17, 7:32 PM CDT	HAIL 1.75	1 S Munday, TX
May 17, 7:41 PM CDT	HAIL 1.25	1 Ne Goree, TX

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

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 17, 4:44 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.0 hours before the alert went out and 238 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: 392 J/kg
Mixed-layer CIN: -323 J/kg
Mixed-layer LCL: 1247 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -57 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

755 
WUUS54 KOUN 180000
SVROUN
TXC023-275-180045-
/O.NEW.KOUN.SV.W.0211.210518T0000Z-210518T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
700 PM CDT Mon May 17 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southern Knox County in northern Texas...
  Southwestern Baylor County in northern Texas...

* Until 745 PM CDT.

* At 659 PM CDT, a severe thunderstorm was located over Knox City,
  moving east at 20 mph.

  HAZARD...Two inch 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. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Munday, Knox City, Benjamin, Goree, Vera, Rhineland and Bomarton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

&&

LAT...LON 3340 9990 3358 9995 3371 9947 3340 9940
TIME...MOT...LOC 2359Z 261DEG 19KT 3342 9980 

HAIL...2.00IN
WIND...60MPH
 
$$

JT

2 follow-up statements

420 
WWUS54 KOUN 180014
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
714 PM CDT Mon May 17 2021

TXC023-275-180045-
/O.CON.KOUN.SV.W.0211.000000T0000Z-210518T0045Z/
Knox TX-Baylor TX-
714 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHEASTERN KNOX AND SOUTHWESTERN BAYLOR COUNTIES...

At 714 PM CDT, a severe thunderstorm was located near Munday, moving
east at 20 mph.

HAZARD...Two inch 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. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Munday, Benjamin, Goree, Vera, Rhineland and Bomarton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

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

&&

LAT...LON 3340 9975 3362 9980 3371 9947 3340 9940
TIME...MOT...LOC 0014Z 265DEG 18KT 3343 9965 

HAIL...2.00IN
WIND...60MPH
 
$$

JT

523 
WWUS54 KOUN 180027
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
727 PM CDT Mon May 17 2021

TXC023-275-180045-
/O.CON.KOUN.SV.W.0211.000000T0000Z-210518T0045Z/
Knox TX-Baylor TX-
727 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHEASTERN KNOX AND SOUTHWESTERN BAYLOR COUNTIES...

At 727 PM CDT, a severe thunderstorm was located near Munday, moving
east at 25 mph.

HAZARD...Two inch 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. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Munday, Goree, Vera and Rhineland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

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

&&

LAT...LON 3340 9966 3352 9972 3361 9966 3364 9958
      3365 9947 3340 9940
TIME...MOT...LOC 0027Z 249DEG 22KT 3345 9959 

HAIL...2.00IN
WIND...60MPH
 
$$

JT

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 7:11 PM CDT	Special Weather Statement	OUN	Wilbarger	34 min
May 17, 7:22 PM CDT	Areal Flood Advisory	OUN	Knox	3 hr
May 17, 7:33 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	42 min
May 17, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita	45 min
May 17, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita	23 min
May 17, 8:19 PM CDT	Areal Flood Advisory	OUN	Baylor	3 hr
May 17, 8:33 PM CDT	Areal Flood Advisory	OUN	Archer	3 hr
May 17, 9:28 PM CDT	Areal Flood Advisory	OUN	Wichita	3 hr
May 17, 10:42 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	33 min
May 17, 11:12 PM CDT	Special Weather Statement	OUN	Hardeman	33 min
May 18, 2:00 AM CDT	Special Weather Statement	OUN	Wichita	30 min
May 18, 2:35 AM CDT	Special Weather Statement	OUN	Wichita	55 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.