Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 25, NWS Tulsa, OK

April 9, 2021Craig County, Nowata County, Rogers County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2021, 4:18 PM CDT for Craig County, Nowata County, Rogers County, Oklahoma. It was in force for 42 min. 2 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: Apr 9, 2021, 4:18 PM CDT (21:18 UTC)
Expired: Apr 9, 2021, 5:00 PM CDT
In force: 42 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Craig County, OK, Nowata County, OK, Rogers County, OK

The radar

The Tulsa radar (KINX), 45 km from the middle of the area, began a volume at 21:20 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
Apr 9, 4:25 PM CDT	HAIL 0.75	Talala, OK
Apr 9, 4:35 PM CDT	HAIL 1.75	2 Nw Chelsea, OK

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
Apr 9, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.3 hours before the alert went out and 152 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: 107 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1650 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 415 m²/s²
0-3 km storm-relative helicity: 429 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

212 
WUUS54 KTSA 092118
SVRTSA
OKC035-105-131-092200-
/O.NEW.KTSA.SV.W.0025.210409T2118Z-210409T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
418 PM CDT Fri Apr 9 2021

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Craig County in northeastern Oklahoma...
  Northern Rogers County in northeastern Oklahoma...
  Southeastern Nowata County in northeastern Oklahoma...

* Until 500 PM CDT.

* At 418 PM CDT, severe thunderstorms were located along a line
  extending from Talala to 5 miles north of Foyil, moving northeast
  at 25 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 in or near the path include...
  Chelsea...                        Foyil...
  Talala...                         New Alluwe...
  Watova...                         Bushyhead...

LAT...LON 3668 9525 3651 9541 3651 9544 3649 9543
      3643 9549 3651 9581 3677 9554
TIME...MOT...LOC 2118Z 222DEG 23KT 3653 9571 3651 9554 

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

1 follow-up statement

678 
WWUS54 KTSA 092136
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
436 PM CDT Fri Apr 9 2021

OKC035-105-131-092200-
/O.CON.KTSA.SV.W.0025.000000T0000Z-210409T2200Z/
Craig OK-Rogers OK-Nowata OK-
436 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHWESTERN CRAIG...NORTHEASTERN ROGERS AND SOUTHEASTERN NOWATA
COUNTIES...

At 436 PM CDT, severe thunderstorms were located along a line
extending from 2 miles east of Watova to Chelsea, moving northeast at
25 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations in or near the path include...
Chelsea...                        New Alluwe...
Watova...                         

LAT...LON 3668 9525 3651 9541 3651 9544 3662 9569
      3677 9554
TIME...MOT...LOC 2136Z 230DEG 20KT 3661 9561 3654 9544 

HAIL...1.25IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 3:08 PM CDT	Special Weather Statement	TSA	Ottawa	37 min
Apr 9, 3:18 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	42 min
Apr 9, 3:51 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Tulsa, Washington	39 min
Apr 9, 3:53 PM CDT	Special Weather Statement	TSA	Ottawa	22 min
Apr 9, 4:01 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	44 min
Apr 9, 4:19 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Rogers	41 min
Apr 9, 4:32 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	43 min
Apr 9, 4:45 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	45 min
Apr 9, 4:56 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	14 min
Apr 9, 5:07 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	38 min
Apr 9, 5:13 PM CDT	Special Weather Statement	TSA	Osage	32 min
Apr 9, 5:22 PM CDT	Severe Thunderstorm Warning	TSA	Osage	53 min
Apr 9, 5:33 PM CDT	Wind Advisory	TSA	Craig, Creek, Mayes, Nowata, Okfuskee, Okmulgee and 5 more	5 hr
Apr 9, 5:46 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	44 min
Apr 9, 5:47 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers	43 min
Apr 9, 5:47 PM CDT	Severe Thunderstorm Warning	TSA	Osage	43 min
Apr 9, 5:59 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	46 min
Apr 9, 6:09 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Washington	51 min
Apr 9, 6:26 PM CDT	Special Weather Statement	TSA	Nowata	34 min
Apr 9, 6:29 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa, Washington	46 min
Apr 9, 6:47 PM CDT	Special Weather Statement	TSA	Craig	28 min
Apr 9, 6:55 PM CDT	Special Weather Statement	TSA	Creek	35 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.