Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Tulsa, OK

April 9, 2021Nowata County, Rogers County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2021, 5:47 PM CDT for Nowata County, Rogers County, Oklahoma. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 9, 2021, 5:47 PM CDT (22:47 UTC)
Expired: Apr 9, 2021, 6:30 PM CDT
In force: 43 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Nowata County, OK, Rogers County, OK

The radar

The Tulsa radar (KINX), 39 km from the middle of the area, began a volume at 22:50 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.

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, 10.8 hours before the alert went out and 174 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.

770 
WUUS54 KTSA 092247
SVRTSA
OKC105-131-092330-
/O.NEW.KTSA.SV.W.0033.210409T2247Z-210409T2330Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northwestern Rogers County in northeastern Oklahoma...
  Southern Nowata County in northeastern Oklahoma...

* Until 630 PM CDT.

* At 547 PM CDT, a severe thunderstorm was located near Oologah,
  moving north at 30 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...
  Nowata...                         Oologah...
  Talala...                         New Alluwe...
  Watova...                         

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3669 9543 3662 9543 3635 9569 3638 9581
      3639 9581 3640 9579 3642 9579 3642 9581
      3652 9581 3674 9578
TIME...MOT...LOC 2247Z 198DEG 25KT 3643 9574 

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

2 follow-up statements

510 
WWUS54 KTSA 092304
SVSTSA

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

OKC105-131-092330-
/O.CON.KTSA.SV.W.0033.000000T0000Z-210409T2330Z/
Rogers OK-Nowata OK-
604 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHWESTERN ROGERS AND SOUTHERN NOWATA COUNTIES...

At 604 PM CDT, a severe thunderstorm was located over Talala, moving
north 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...
Nowata...                         Oologah...
Talala...                         New Alluwe...
Watova...                         

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3669 9543 3662 9543 3643 9561 3647 9581
      3652 9581 3674 9578
TIME...MOT...LOC 2304Z 197DEG 23KT 3652 9570 

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

118 
WWUS54 KTSA 092324 RRA
SVSTSA

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

OKC105-131-092334-
/O.EXP.KTSA.SV.W.0033.000000T0000Z-210409T2330Z/
Rogers OK-Nowata OK-
624 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ROGERS AND
SOUTHERN NOWATA COUNTIES WILL EXPIRE AT 630 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.  However small hail
and gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
northeastern Oklahoma.

LAT...LON 3669 9543 3662 9543 3643 9561 3647 9581
      3652 9581 3674 9578
TIME...MOT...LOC 2324Z 198DEG 23KT 3661 9566 

$$

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, 4:18 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Rogers	42 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	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.