Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 12, NWS Tulsa, OK

March 17, 20214 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 17, 2021, 4:25 AM CDT for 4 counties in Oklahoma. It was in force for 50 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, 4:25 AM CDT (09:25 UTC)
Expired
Mar 17, 2021, 5:15 AM CDT
In force
50 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Nowata County, OK, Osage County, OK, Pawnee County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 71 km from the middle of the area, began a volume at 09:26 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

TimeReportWhereRemark
Mar 17, 5:16 AM CDTHAIL 0.75Bartlesville, OKPICTURE ON SOCIAL MEDIA.

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.

IssuedProductOfficeLasted
Mar 17, 1:54 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 9.4 hours before the alert went out and 197 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2021-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 626 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2021-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

748 
WUUS54 KTSA 170925
SVRTSA
OKC105-113-117-147-171015-
/O.NEW.KTSA.SV.W.0012.210317T0925Z-210317T1015Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Osage County in northeastern Oklahoma...
  Washington County in northeastern Oklahoma...
  Western Nowata County in northeastern Oklahoma...
  Central Pawnee County in northeastern Oklahoma...

* Until 515 AM CDT.

* At 424 AM CDT, severe thunderstorms were located along a line
  extending from 8 miles south of Cedar Vale to 6 miles southeast of
  Shidler to 3 miles west of Skedee, moving east at 55 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...
  Bartlesville...                   Pawhuska...
  Pawnee...                         Hominy...
  Dewey...                          Fairfax...
  Barnsdall...                      Copan...
  Ramona...                         Shidler...
  Wynona...                         Ochelata...
  Ralston...                        Avant...
  Vera...                           Burbank...
  Wann...                           Blackburn...
  Skedee...                         Foraker...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3700 9572 3660 9577 3660 9581 3642 9581
      3642 9600 3638 9600 3630 9685 3671 9674
      3700 9659
TIME...MOT...LOC 0924Z 258DEG 48KT 3699 9647 3673 9655 3637 9676 

HAIL...1.00IN
WIND...60MPH
 
$$
3 follow-up statements
624 
WWUS54 KTSA 170942
SVSTSA

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

OKC105-113-117-147-171015-
/O.CON.KTSA.SV.W.0012.000000T0000Z-210317T1015Z/
Osage OK-Washington OK-Nowata OK-Pawnee OK-
442 AM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR OSAGE...WASHINGTON...WESTERN NOWATA AND CENTRAL PAWNEE
COUNTIES...

At 442 AM CDT, severe thunderstorms were located along a line
extending from Chautauqua to 3 miles northwest of Pawhuska to 4 miles
west of Hominy, moving east at 50 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations in or near the path include...
Bartlesville...                   Pawhuska...
Hominy...                         Dewey...
Barnsdall...                      Copan...
Ramona...                         Wynona...
Ochelata...                       Avant...
Vera...                           Wann...
Blackburn...                      Skedee...
Bigheart...                       Bartlesville Municipal Airport...
Osage Hills State Park...         Pearsonia...
Hulah...                          Sunset Lake...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3700 9572 3660 9577 3660 9581 3642 9581
      3642 9600 3638 9600 3631 9679 3700 9642
TIME...MOT...LOC 0942Z 260DEG 42KT 3704 9618 3671 9637 3642 9647 

HAIL...0.88IN
WIND...60MPH
 
$$
058 
WWUS54 KTSA 171000
SVSTSA

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

OKC105-113-117-147-171015-
/O.CON.KTSA.SV.W.0012.000000T0000Z-210317T1015Z/
Osage OK-Washington OK-Nowata OK-Pawnee OK-
500 AM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR EASTERN OSAGE...WASHINGTON...WESTERN NOWATA AND CENTRAL PAWNEE
COUNTIES...

At 500 AM CDT, severe thunderstorms were located along a line
extending from 3 miles east of Hulah to 3 miles northwest of
Barnsdall to 3 miles south of Hominy, moving east at 50 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations in or near the path include...
Bartlesville...                   Pawhuska...
Hominy...                         Dewey...
Barnsdall...                      Copan...
Ramona...                         Wynona...
Ochelata...                       Avant...
Vera...                           Wann...
Blackburn...                      Skedee...
Bigheart...                       Bartlesville Municipal Airport...
Osage Hills State Park...         Hulah...
Sunset Lake...                    Okesa...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3700 9572 3660 9577 3660 9581 3642 9581
      3642 9600 3638 9600 3631 9679 3700 9617
TIME...MOT...LOC 1000Z 267DEG 43KT 3694 9597 3660 9621 3636 9638 

HAIL...0.75IN
WIND...60MPH
 
$$
543 
WWUS54 KTSA 171015
SVSTSA

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

OKC105-113-117-147-171025-
/O.EXP.KTSA.SV.W.0012.000000T0000Z-210317T1015Z/
Osage OK-Washington OK-Nowata OK-Pawnee OK-
515 AM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN OSAGE...WASHINGTON...
WESTERN NOWATA AND CENTRAL PAWNEE COUNTIES HAS EXPIRED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been allowed to expire.  However small hail
and gusty winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 800 AM CDT for
northeastern Oklahoma.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tulsa.

LAT...LON 3700 9572 3660 9577 3660 9581 3642 9581
      3642 9600 3638 9600 3631 9679 3700 9617
TIME...MOT...LOC 1015Z 258DEG 48KT 3697 9577 3663 9601 3639 9618 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 17, 1:25 AM CDTSpecial Weather StatementTSALeFlore35 min
Mar 17, 1:33 AM CDTSevere Thunderstorm WarningTSALeFlore42 min
Mar 17, 2:04 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee41 min
Mar 17, 2:44 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee46 min
Mar 17, 3:28 AM CDTSevere Thunderstorm WarningTSAOsage47 min
Mar 17, 3:46 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee44 min
Mar 17, 4:19 AM CDTSpecial Weather StatementTSANowata, Washington26 min
Mar 17, 4:22 AM CDTAreal Flood AdvisoryTSAOsage, Pawnee3 hr
Mar 17, 4:37 AM CDTSpecial Weather StatementTSAPawnee53 min
Mar 17, 4:52 AM CDTSpecial Weather StatementTSACherokee, Craig, Delaware, McIntosh, Mayes, Muskogee and 4 more38 min
Mar 17, 5:13 AM CDTSpecial Weather StatementTSANowata, Washington47 min
Mar 17, 5:14 AM CDTSpecial Weather StatementTSANowata, Washington46 min
Mar 17, 5:24 AM CDTSpecial Weather StatementTSAPawnee36 min
Mar 17, 5:27 AM CDTSpecial Weather StatementTSAAdair, Cherokee, Craig, Delaware, Haskell, Latimer and 4 more33 min
Mar 17, 5:54 AM CDTSpecial Weather StatementTSACraig, Creek, Nowata, Ottawa, Rogers, Tulsa51 min
Mar 17, 5:57 AM CDTSpecial Weather StatementTSAAdair, Cherokee, Delaware, Haskell, LeFlore, Sequoyah48 min
Mar 17, 6:15 AM CDTSpecial Weather StatementTSAChoctaw45 min
Mar 17, 6:33 AM CDTSpecial Weather StatementTSAAdair42 min
Mar 17, 6:46 AM CDTSpecial Weather StatementTSAOttawa29 min
Mar 17, 1:42 PM CDTSpecial Weather StatementTSATulsa33 min
Mar 17, 1:46 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa, Wagoner44 min
Mar 17, 1:54 PM CDTSpecial Weather StatementTSADelaware36 min
Mar 17, 1:58 PM CDTTornado WarningTSACreek32 min
Mar 17, 2:13 PM CDTWind AdvisoryTSACraig, Creek, Nowata, Okfuskee, Okmulgee, Pawnee and 3 more7 hr
Mar 17, 2:17 PM CDTTornado WarningTSARogers, Wagoner28 min
Mar 17, 2:28 PM CDTSevere Thunderstorm WarningTSACreek, Osage, Tulsa47 min
Mar 17, 2:32 PM CDTSpecial Weather StatementTSADelaware43 min
Mar 17, 3:11 PM CDTSpecial Weather StatementTSARogers34 min
Mar 17, 3:14 PM CDTSpecial Weather StatementTSANowata31 min
Mar 17, 3:16 PM CDTSpecial Weather StatementTSADelaware29 min
Mar 17, 3:16 PM CDTSpecial Weather StatementTSADelaware29 min
Mar 17, 3:23 PM CDTSpecial Weather StatementTSACraig37 min
Mar 17, 3:31 PM CDTSpecial Weather StatementTSAWashington29 min
Mar 17, 3:51 PM CDTSevere Thunderstorm WarningTSAOsage, Washington10 min
Mar 17, 4:14 PM CDTSpecial Weather StatementTSAOttawa31 min
Mar 17, 4:58 PM CDTSpecial Weather StatementTSADelaware32 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021Every 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.