Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 40, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2021, 7:38 PM CDT for 6 counties in Oklahoma. It was in force for 52 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, 7:38 PM CDT (00:38 UTC)
- Expired
- Apr 9, 2021, 8:30 PM CDT
- In force
- 52 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Creek County, OK, Muskogee County, OK, Okmulgee County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK
The radar
The Tulsa radar (KINX), 21 km from the middle of the area, began a volume at 00:41 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
Norman, OK (KOUN), launched 00:00Z, 0.6 hours before the alert went out and 176 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.
- Mixed-layer CAPE
- 1392 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 1212 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.2
The text
As transmitted.
659
WUUS54 KTSA 100038
SVRTSA
OKC037-101-111-131-143-145-100130-
/O.NEW.KTSA.SV.W.0040.210410T0038Z-210410T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
738 PM CDT Fri Apr 9 2021
The National Weather Service in Tulsa has issued a
* Severe Thunderstorm Warning for...
Southern Rogers County in northeastern Oklahoma...
East central Creek County in northeastern Oklahoma...
Western Wagoner County in northeastern Oklahoma...
Northwestern Muskogee County in east central Oklahoma...
Northern Okmulgee County in northeastern Oklahoma...
Tulsa County in northeastern Oklahoma...
* Until 830 PM CDT.
* At 738 PM CDT, severe thunderstorms were located along a line
extending from 2 miles west of Turley to near Glenpool to 5 miles
east of Slick, moving east at 45 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...
Tulsa... Broken Arrow...
Sand Springs... Claremore...
Owasso... Bixby...
Sapulpa... Jenks...
Glenpool... Coweta...
Catoosa... Verdigris...
Haskell... Inola...
Kiefer... Sperry...
Mounds... Jenks Riverside Airport...
Stonebluff... Turley...
This includes Interstate 44 between mile markers 209 and 254.
LAT...LON 3616 9610 3617 9600 3633 9600 3634 9543
3608 9544 3607 9543 3604 9543 3577 9561
3576 9623
TIME...MOT...LOC 0038Z 259DEG 40KT 3625 9600 3598 9599 3578 9616
HAIL...1.00IN
WIND...60MPH
$$2 follow-up statements
929
WWUS54 KTSA 100103
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
803 PM CDT Fri Apr 9 2021
OKC037-101-100113-
/O.CAN.KTSA.SV.W.0040.000000T0000Z-210410T0130Z/
Creek OK-Muskogee OK-
803 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CREEK AND
NORTHWESTERN MUSKOGEE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area therefore the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
northeastern and east central Oklahoma.
LAT...LON 3610 9544 3604 9543 3582 9559 3582 9564
3586 9565 3586 9577 3582 9577 3581 9603
3607 9587 3633 9578 3634 9543
TIME...MOT...LOC 0103Z 259DEG 40KT 3630 9568 3603 9567 3583 9584
$$
OKC111-131-143-145-100130-
/O.CON.KTSA.SV.W.0040.000000T0000Z-210410T0130Z/
Rogers OK-Wagoner OK-Okmulgee OK-Tulsa OK-
803 PM CDT Fri Apr 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHERN ROGERS...WESTERN WAGONER...NORTH CENTRAL OKMULGEE AND
SOUTHEASTERN TULSA COUNTIES...
At 803 PM CDT, severe thunderstorms were located along a line
extending from 3 miles west of Claremore to 2 miles east of Oneta to
6 miles north of Bald Hill, moving east at 45 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...
Tulsa... Broken Arrow...
Claremore... Bixby...
Jenks... Coweta...
Catoosa... Verdigris...
Inola... Stonebluff...
Taiwah... Tiawah...
Oneta... Liberty...
Redbird... Hectorville...
Leonard... Choska...
This includes Interstate 44 between mile markers 231 and 254.
LAT...LON 3610 9544 3604 9543 3582 9559 3582 9564
3586 9565 3586 9577 3582 9577 3581 9603
3607 9587 3633 9578 3634 9543
TIME...MOT...LOC 0103Z 259DEG 40KT 3630 9568 3603 9567 3583 9584
HAIL...1.00IN
WIND...60MPH
$$518
WWUS54 KTSA 100120
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
820 PM CDT Fri Apr 9 2021
OKC111-131-143-145-100130-
/O.EXP.KTSA.SV.W.0040.000000T0000Z-210410T0130Z/
Rogers OK-Wagoner OK-Okmulgee OK-Tulsa OK-
820 PM CDT Fri Apr 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ROGERS...WESTERN
WAGONER...NORTH CENTRAL OKMULGEE AND SOUTHEASTERN TULSA COUNTIES WILL
EXPIRE AT 830 PM CDT...
The storms which prompted the warning have moved out of the area.
Therefore the warning will be allowed to expire. However gusty winds
and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
northeastern and east central Oklahoma.
LAT...LON 3610 9544 3604 9543 3582 9559 3582 9564
3586 9565 3586 9577 3582 9577 3581 9603
3607 9587 3633 9578 3634 9543
TIME...MOT...LOC 0120Z 259DEG 40KT 3633 9546 3606 9545 3586 9562
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 7:02 PM CDT | Special Weather Statement | TSA | Rogers | 28 min |
| Apr 9, 7:09 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 51 min |
| Apr 9, 7:12 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 48 min |
| Apr 9, 7:24 PM CDT | Special Weather Statement | TSA | Tulsa | 36 min |
| Apr 9, 7:29 PM CDT | Special Weather Statement | TSA | Ottawa | 31 min |
| Apr 9, 7:38 PM CDT | Special Weather Statement | TSA | Craig, Nowata | 37 min |
| Apr 9, 7:41 PM CDT | Tornado Warning | TSA | Creek, Tulsa | 20 min |
| Apr 9, 7:52 PM CDT | Special Weather Statement | TSA | Cherokee, Mayes | 23 min |
| Apr 9, 7:56 PM CDT | Special Weather Statement | TSA | Okfuskee | 34 min |
| Apr 9, 8:02 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 29 min |
| Apr 9, 8:28 PM CDT | Special Weather Statement | TSA | Cherokee, Mayes | 32 min |
| Apr 9, 8:29 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 46 min |
| Apr 9, 8:49 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 41 min |
| Apr 9, 8:59 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg, Pushmataha | 50 min |
| Apr 9, 9:03 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, McIntosh, Muskogee, Sequoyah | 42 min |
| Apr 9, 9:24 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 66 min |
| Apr 9, 9:27 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Sequoyah | 48 min |
| Apr 9, 9:30 PM CDT | Special Weather Statement | TSA | Muskogee | 30 min |
| Apr 9, 9:35 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, LeFlore, Pushmataha | 55 min |
| Apr 9, 9:37 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, LeFlore, Muskogee, Sequoyah | 38 min |
| Apr 9, 9:58 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, LeFlore, Pushmataha | 47 min |
| Apr 9, 10:24 PM CDT | Special Weather Statement | TSA | LeFlore | 36 min |
| Apr 9, 10:33 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.