Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Tulsa, OK

March 17, 2021Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 17, 2021, 3:46 AM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 44 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: Mar 17, 2021, 3:46 AM CDT (08:46 UTC)
Expired: Mar 17, 2021, 4:30 AM CDT
In force: 44 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Osage County, OK, Pawnee County, OK

The radar

The Vance AFB radar (KVNX), 113 km from the middle of the area, began a volume at 08:49 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
Mar 17, 4:15 AM CDT	TSTM WND GST 60	Burbank, 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
Mar 17, 1:54 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 8.8 hours before the alert went out and 158 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: 626 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1825 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

872 
WUUS54 KTSA 170846
SVRTSA
OKC113-117-170930-
/O.NEW.KTSA.SV.W.0011.210317T0846Z-210317T0930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
346 AM CDT Wed Mar 17 2021

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northwestern Osage County in northeastern Oklahoma...
  Western Pawnee County in northeastern Oklahoma...

* Until 430 AM CDT.

* At 346 AM CDT, severe thunderstorms were located along a line
  extending from 4 miles west of Kaw City to 4 miles northeast of
  Orlando, moving northeast at 35 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...
  Pawnee...                         Fairfax...
  Shidler...                        Ralston...
  Burbank...                        Skedee...
  Foraker...                        Pearsonia...
  Webb City...                      Apperson...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3670 9704 3668 9694 3675 9689 3674 9683
      3677 9682 3678 9675 3686 9674 3700 9617
      3622 9678 3621 9682 3625 9682 3625 9692
      3633 9693 3634 9703 3651 9703 3655 9690
      3658 9689 3660 9692 3659 9706 3666 9706
TIME...MOT...LOC 0846Z 240DEG 30KT 3678 9694 3619 9732 

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

1 follow-up statement

510 
WWUS54 KTSA 170908
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
408 AM CDT Wed Mar 17 2021

OKC113-117-170930-
/O.CON.KTSA.SV.W.0011.000000T0000Z-210317T0930Z/
Osage OK-Pawnee OK-
408 AM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 AM CDT
FOR NORTHWESTERN OSAGE AND NORTHWESTERN PAWNEE COUNTIES...

At 408 AM CDT, severe thunderstorms were located along a line
extending from 3 miles northwest of Shidler to 4 miles northeast of
Morrison, moving east at 60 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...
Pawnee...                         Fairfax...
Shidler...                        Ralston...
Burbank...                        Skedee...
Foraker...                        Pearsonia...
Webb City...                      

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3635 9668 3629 9693 3633 9693 3634 9701
      3687 9669 3688 9668 3700 9617
TIME...MOT...LOC 0908Z 247DEG 51KT 3683 9669 3635 9698 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 1:25 AM CDT	Special Weather Statement	TSA	LeFlore	35 min
Mar 17, 1:33 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	42 min
Mar 17, 2:04 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	41 min
Mar 17, 2:44 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	46 min
Mar 17, 3:28 AM CDT	Severe Thunderstorm Warning	TSA	Osage	47 min
Mar 17, 4:19 AM CDT	Special Weather Statement	TSA	Nowata, Washington	26 min
Mar 17, 4:22 AM CDT	Areal Flood Advisory	TSA	Osage, Pawnee	3 hr
Mar 17, 4:25 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Pawnee, Washington	50 min
Mar 17, 4:37 AM CDT	Special Weather Statement	TSA	Pawnee	53 min
Mar 17, 4:52 AM CDT	Special Weather Statement	TSA	Cherokee, Craig, Delaware, McIntosh, Mayes, Muskogee and 4 more	38 min
Mar 17, 5:13 AM CDT	Special Weather Statement	TSA	Nowata, Washington	47 min
Mar 17, 5:14 AM CDT	Special Weather Statement	TSA	Nowata, Washington	46 min
Mar 17, 5:24 AM CDT	Special Weather Statement	TSA	Pawnee	36 min
Mar 17, 5:27 AM CDT	Special Weather Statement	TSA	Adair, Cherokee, Craig, Delaware, Haskell, Latimer and 4 more	33 min
Mar 17, 5:54 AM CDT	Special Weather Statement	TSA	Craig, Creek, Nowata, Ottawa, Rogers, Tulsa	51 min
Mar 17, 5:57 AM CDT	Special Weather Statement	TSA	Adair, Cherokee, Delaware, Haskell, LeFlore, Sequoyah	48 min
Mar 17, 6:15 AM CDT	Special Weather Statement	TSA	Choctaw	45 min
Mar 17, 6:33 AM CDT	Special Weather Statement	TSA	Adair	42 min
Mar 17, 6:46 AM CDT	Special Weather Statement	TSA	Ottawa	29 min
Mar 17, 1:42 PM CDT	Special Weather Statement	TSA	Tulsa	33 min
Mar 17, 1:46 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	44 min
Mar 17, 1:54 PM CDT	Special Weather Statement	TSA	Delaware	36 min
Mar 17, 1:58 PM CDT	Tornado Warning	TSA	Creek	32 min
Mar 17, 2:13 PM CDT	Wind Advisory	TSA	Craig, Creek, Nowata, Okfuskee, Okmulgee, Pawnee and 3 more	7 hr
Mar 17, 2:17 PM CDT	Tornado Warning	TSA	Rogers, Wagoner	28 min
Mar 17, 2:28 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Tulsa	47 min
Mar 17, 2:32 PM CDT	Special Weather Statement	TSA	Delaware	43 min
Mar 17, 3:11 PM CDT	Special Weather Statement	TSA	Rogers	34 min
Mar 17, 3:14 PM CDT	Special Weather Statement	TSA	Nowata	31 min
Mar 17, 3:16 PM CDT	Special Weather Statement	TSA	Delaware	29 min
Mar 17, 3:16 PM CDT	Special Weather Statement	TSA	Delaware	29 min
Mar 17, 3:23 PM CDT	Special Weather Statement	TSA	Craig	37 min
Mar 17, 3:31 PM CDT	Special Weather Statement	TSA	Washington	29 min
Mar 17, 3:51 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	10 min
Mar 17, 4:14 PM CDT	Special Weather Statement	TSA	Ottawa	31 min
Mar 17, 4:58 PM CDT	Special Weather Statement	TSA	Delaware	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.