Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 5, NWS Norman, OK

January 25, 2021Atoka County, Bryan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jan 25, 2021, 4:58 AM CST for Atoka County, Bryan County, Oklahoma. It was in force for 47 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: Jan 25, 2021, 4:58 AM CST (10:58 UTC)
Expired: Jan 25, 2021, 5:45 AM CST
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Atoka County, OK, Bryan County, OK

The radar

The Norman radar (KTLX), 173 km from the middle of the area, began a volume at 11:01 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
Jan 25, 5:15 AM CST	HAIL 1	3 S Durant, OK

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

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 11.0 hours before the alert went out and 171 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: 612 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 395 m²/s²
0-3 km storm-relative helicity: 763 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted.

230 
WUUS54 KOUN 251058
SVROUN
OKC005-013-251145-
/O.NEW.KOUN.SV.W.0005.210125T1058Z-210125T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
458 AM CST Mon Jan 25 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Northwestern Bryan County in southeastern Oklahoma...
  Southeastern Atoka County in southeastern Oklahoma...

* Until 545 AM CST.

* At 458 AM CST, a severe thunderstorm was located 4 miles north of
  Colbert, moving northeast at 70 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Durant, Colbert, Caddo, Bokchito, Achille, Bennington, Tushka,
  Caney, Armstrong, Cartwright, Blue, Lane, eastern Lake Texoma,
  Calera, Bentley, McGee Creek Lake and Darwin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3416 9598 3415 9597 3414 9595 3406 9594
      3379 9649 3388 9660 3392 9658 3454 9593
      3438 9578 3416 9578
TIME...MOT...LOC 1058Z 233DEG 60KT 3392 9647 

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

30

2 follow-up statements

268 
WWUS54 KOUN 251122
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
522 AM CST Mon Jan 25 2021

OKC005-013-251145-
/O.CON.KOUN.SV.W.0005.000000T0000Z-210125T1145Z/
Bryan OK-Atoka OK-
522 AM CST Mon Jan 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 AM CST
FOR NORTH CENTRAL BRYAN AND SOUTHEASTERN ATOKA COUNTIES...

At 522 AM CST, a severe thunderstorm was located 8 miles northeast of
Bokchito, moving northeast at 65 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Caddo, Bokchito, Tushka, Caney, Blue, Lane, McGee Creek Lake, Bentley
and Darwin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3416 9598 3415 9597 3414 9595 3406 9594
      3392 9623 3404 9630 3416 9633 3454 9593
      3438 9578 3416 9578
TIME...MOT...LOC 1122Z 234DEG 58KT 3413 9608 

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

30

253 
WWUS54 KOUN 251139
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
539 AM CST Mon Jan 25 2021

OKC005-013-251148-
/O.EXP.KOUN.SV.W.0005.000000T0000Z-210125T1145Z/
Bryan OK-Atoka OK-
539 AM CST Mon Jan 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR BRYAN AND 
ATOKA COUNTIES WILL EXPIRE AT 545 AM CST...
        
The storm which prompted the warning has weakened and moved out of 
the area. Therefore, the warning will be allowed to expire.

LAT...LON 3416 9598 3415 9597 3414 9595 3406 9594
      3392 9623 3404 9630 3416 9633 3454 9593
      3438 9578 3416 9578
TIME...MOT...LOC 1138Z 233DEG 60KT 3422 9593 

$$

BRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 24, 10:10 PM CST	Special Weather Statement	OUN	Washita	35 min
Jan 24, 10:28 PM CST	Special Weather Statement	OUN	Blaine	32 min
Jan 24, 10:56 PM CST	Special Weather Statement	OUN	Blaine	34 min
Jan 24, 11:41 PM CST	Special Weather Statement	OUN	Washita	34 min
Jan 25, 12:09 AM CST	Severe Thunderstorm Warning	OUN	Tillman	51 min
Jan 25, 12:31 AM CST	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	44 min
Jan 25, 12:38 AM CST	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	37 min
Jan 25, 1:01 AM CST	Severe Thunderstorm Warning	OUN	Carter, Comanche, Cotton, Garvin, Grady, Jefferson and 1 more	44 min
Jan 25, 1:43 AM CST	Special Weather Statement	OUN	Carter, Garvin, Murray	32 min
Jan 25, 2:26 AM CST	Special Weather Statement	OUN	Hughes, Murray, Pontotoc, Seminole	49 min
Jan 25, 3:39 AM CST	Special Weather Statement	OUN	Coal, Johnston, Marshall	51 min
Jan 25, 4:51 AM CST	Special Weather Statement	OUN	Atoka, Bryan	39 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.