Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 173, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 4, 2020, 8:48 PM CDT for Muskogee County, Oklahoma. It was in force for 27 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
- May 4, 2020, 8:48 PM CDT (01:48 UTC)
- Expired
- May 4, 2020, 9:15 PM CDT
- In force
- 27 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Muskogee County, OK
The radar
The Tulsa radar (KINX), 69 km from the middle of the area, began a volume at 01:51 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 4, 2:32 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 1.8 hours before the alert went out and 191 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
- 135 J/kg
- Mixed-layer CIN
- -464 J/kg
- Mixed-layer LCL
- 494 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 436 m²/s²
- 0-3 km storm-relative helicity
- 495 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.7
The text
As transmitted.
098
WUUS54 KTSA 050148
SVRTSA
OKC101-050215-
/O.NEW.KTSA.SV.W.0173.200505T0148Z-200505T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
848 PM CDT Mon May 4 2020
The National Weather Service in Tulsa has issued a
* Severe Thunderstorm Warning for...
East central Muskogee County in east central Oklahoma...
* Until 915 PM CDT.
* At 848 PM CDT, a severe thunderstorm was located 4 miles northeast
of Keefeton, moving east at 40 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...
Braggs... Greenleaf State Park...
A Tornado Watch remains in effect until 1000 PM CDT for east central
Oklahoma.
LAT...LON 3555 9513 3560 9538 3569 9536 3572 9513
TIME...MOT...LOC 0148Z 278DEG 33KT 3565 9530
HAIL...1.00IN
WIND...60MPH
$$3 follow-up statements
455
WWUS54 KTSA 050157 RRB
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
857 PM CDT Mon May 4 2020
OKC101-050215-
/O.CON.KTSA.SV.W.0173.000000T0000Z-200505T0215Z/
Muskogee OK-
857 PM CDT Mon May 4 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR EAST CENTRAL MUSKOGEE COUNTY...
At 857 PM CDT, a severe thunderstorm was located over Braggs, moving
east at 30 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations in or near the path include...
Braggs... Greenleaf State Park...
A Tornado Watch remains in effect until 1000 PM CDT for east central
Oklahoma.
LAT...LON 3555 9513 3559 9531 3570 9528 3572 9513
TIME...MOT...LOC 0157Z 277DEG 27KT 3564 9522
HAIL...1.50IN
WIND...60MPH
$$901
WWUS54 KTSA 050204
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
904 PM CDT Mon May 4 2020
OKC101-050215-
/O.CON.KTSA.SV.W.0173.000000T0000Z-200505T0215Z/
Muskogee OK-
904 PM CDT Mon May 4 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR EAST CENTRAL MUSKOGEE COUNTY...
At 904 PM CDT, a severe thunderstorm was located over Greenleaf State
Park, moving east at 40 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...
Braggs... Greenleaf State Park...
A Tornado Watch remains in effect until 1000 PM CDT for east central
Oklahoma.
LAT...LON 3558 9527 3570 9520 3571 9513 3555 9513
TIME...MOT...LOC 0204Z 276DEG 34KT 3563 9517
HAIL...1.25IN
WIND...60MPH
$$447
WWUS54 KTSA 050213
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
913 PM CDT Mon May 4 2020
OKC101-050222-
/O.EXP.KTSA.SV.W.0173.000000T0000Z-200505T0215Z/
Muskogee OK-
913 PM CDT Mon May 4 2020
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MUSKOGEE COUNTY
WILL EXPIRE AT 915 PM CDT...
The storm which prompted the warning was moving out of the area.
Therefore the warning will be allowed to expire.
A Tornado Watch remains in effect until 1000 PM CDT for east central
Oklahoma.
LAT...LON 3558 9527 3570 9520 3571 9513 3555 9513
TIME...MOT...LOC 0212Z 278DEG 33KT 3562 9509
$$What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 4, 6:34 PM CDT, 2 hours 14 minutes earlier.
Area forecast discussion, May 4, 6:34 PM CDT, 2 hours 14 minutes before
Area Forecast Discussion National Weather Service Tulsa OK 634 PM CDT Mon May 4 2020 .AVIATION... CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG. MVFR to VFR conditions are expected Tonight even with scattered severe thunderstorms affecting KMLC and the western Arkansas sites through 6z. VFR conditions are anticipated on Tuesday. && .PREV DISCUSSION... /Issued 231 PM CDT Mon May 4 2020/ ..SEVERE WEATHER EXPECTED THIS AFTERNOON AND EVENING... DISCUSSION... Atmosphere has become extremely unstable this afternoon with MLCAPES approaching 4500 J/KG just west of the area across north- central Oklahoma. Cold front currently moving into far northwest Osage county with pre-frontal boundary located slightly further south, near a Ralston, Copan line. Latest CAMs and surface analysis trends indicate scattered supercells will quickly develop along frontal boundary in the 3-5 PM range just north of I-44 with 0-6 KM deep layer shear remaining in 40 to 50 knot range. Very large hail to baseballs and damaging winds to 70 mph will be possible in the stronger cells. Although low level wind fields in the 0-1 KM range are not overly impressive, given the extreme instability, any deviant storm motion, with a more southern track, would likely enhance SRH/tornado threat. In addition, winds are little more backed/stronger across far northeast Oklahoma and northwest Arkansas near warm front, where a tornado or two will also be possible. Storms will likely become more linear with time with multiple strong to severe thunderstorm clusters pushing into southeast Oklahoma and northeast Arkansas this evening, transitioning towards a damaging wind threat. Significantly cooler weather expected behind front Tuesday into Wednesday as surface high pressure builds over the region. Models remain in good agreement with stronger upper shortwave moving out of the northern Rockies and into the central Plains on Thursday. Shower/thunderstorm chances will begin to ramp up Thursday afternoon into Thursday night with widespread rain expected with FROPA. NBM guidance looks good for the remainder of the extended periods. && .TSA WATCHES/WARNINGS/ADVISORIES... OK...None. AR...None. && AVIATION.....10
Hazardous weather outlook, May 4, 5:22 PM CDT, 3 hours 26 minutes before
Hazardous Weather Outlook National Weather Service Tulsa OK 522 PM CDT Mon May 4 2020 ARZ001-002-010-011-019-020-029-OKZ049-053>076-051000- Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK- Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK- Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK- Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK- Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK- Washington OK-Washington AR- 522 PM CDT Mon May 4 2020 ...SIGNIFICANT SEVERE STORM POTENTIAL THROUGH THIS EVENING...VERY LARGE HAIL...DAMAGING WINDS AND ONE OR TWO STRONG TORNADOES... This Outlook is for Northwest and West Central Arkansas as well as much of Eastern Oklahoma. .DAY ONE...Tonight. TORNADO. RISK...Elevated. AREA...Eastern Oklahoma and Northwest Arkansas. ONSET...Ongoing. SEVERE THUNDERSTORM. RISK...Critical. AREA...Mainly Southeast of Interstate 44. ONSET...Ongoing. FLASH FLOOD. RISK...Limited. AREA...Eastern Oklahoma and Northwest Arkansas. ONSET...Ongoing. HEAVY RAIN. RISK...Limited. AREA...Eastern Oklahoma and Northwest Arkansas. ONSET...Ongoing. DISCUSSION... Scattered strong to severe thunderstorms have developed late this afternoon along and just ahead of a strong cold front that is nearing the Interstate 44 corridor. A few tornadoes, with one or two strong tornadoes, are possible into the early evening hours. Very large hail to baseball size and winds to 70 miles an hour will also be possible with the strongest storms. Locally heavy rainfall may also result in some localized flooding issues. SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT... Activation of the Regional Spotter Network Expected. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. TUESDAY...High Wind Potential. WEDNESDAY...No Hazards. THURSDAY...Thunderstorm Potential...Heavy Rain Potential. FRIDAY...Thunderstorm Potential. SATURDAY and SUNDAY...No Hazards. EXTENDED DISCUSSION... After a dry Tuesday and Wednesday, thunderstorm chances along with a severe weather threat return for Thursday into early Friday. weather.gov/tulsa contains additional information.
In the hours before
Local storm report, May 4, 8:05 PM CDT, 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
805 PM CDT MON MAY 4 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0610 PM TSTM WND DMG 4 SSE WYANDOTTE 36.74N 94.70W
05/04/2020 OTTAWA OK TRAINED SPOTTER
MULTIPLE TREES DOWN ON HIGHWAY 10 AND S 652 ROAD
&&
MATSpecial weather statement, May 4, 8:08 PM CDT, 40 minutes before
Special Weather Statement
National Weather Service Tulsa OK
808 PM CDT Mon May 4 2020
ARZ001-010-011-OKZ069-050145-
Madison AR-Benton AR-Washington AR-Adair OK-
808 PM CDT Mon May 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN BENTON...NORTHWESTERN
MADISON...NORTHERN WASHINGTON AND NORTHERN ADAIR COUNTIES UNTIL 845
PM CDT...
At 807 PM CDT, a strong thunderstorm was located 7 miles south of
Springtown, moving east at 60 mph.
Penny size hail and winds in excess of 40 mph will be possible with
this storm.
Locations in or near the path include...
Fayetteville... Springdale...
Siloam Springs... Lowell...
Farmington... Tontitown...
Bethel Heights... West Siloam Springs...
Watts... Hobbs State Park...
War Eagle... Johnson...
Elm Springs... Goshen...
Savoy... Ballard...
Wedington... Gallitin...
Best... Rocky Comfort...
This includes Interstate 49 between mile markers 62 and 78.
A Tornado Watch remains in effect until 1000 PM CDT for northwestern
Arkansas...and northeastern Oklahoma.
LAT...LON 3607 9388 3604 9478 3616 9461 3616 9456
3619 9457 3624 9450 3628 9386
TIME...MOT...LOC 0107Z 269DEG 54KT 3615 9440Special weather statement, May 4, 8:09 PM CDT, 39 minutes before
Special Weather Statement National Weather Service Tulsa OK 809 PM CDT Mon May 4 2020 OKZ066-067-070-050145- Muskogee OK-Okmulgee OK-Wagoner OK- 809 PM CDT Mon May 4 2020 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WAGONER... NORTHWESTERN MUSKOGEE AND NORTHEASTERN OKMULGEE COUNTIES UNTIL 845 PM CDT... At 809 PM CDT, a strong thunderstorm was located 4 miles south of Haskell, moving northeast at 50 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations in or near the path include... Muskogee... Wagoner... Haskell... Okay... Porter... Taft... Boynton... Tullahassee... Bald Hill... Jamesville... Choska... A Tornado Watch remains in effect until 1000 PM CDT for northeastern and east central Oklahoma. LAT...LON 3563 9569 3577 9590 3596 9535 3580 9526 TIME...MOT...LOC 0109Z 247DEG 42KT 3575 9566
Special weather statement, May 4, 8:10 PM CDT, 38 minutes before
Special Weather Statement National Weather Service Tulsa OK 810 PM CDT Mon May 4 2020 OKZ058-063-050130- Delaware OK-Ottawa OK- 810 PM CDT Mon May 4 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL DELAWARE AND SOUTHERN OTTAWA COUNTIES UNTIL 830 PM CDT... At 810 PM CDT, a strong thunderstorm was located 3 miles south of Fairland, moving northeast at 65 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations in or near the path include... Grove... Fairland... Wyandotte... Cayuga... Twin Bridges State Park... This includes Interstate 44 between mile markers 297 and 300. A Tornado Watch remains in effect until 1000 PM CDT for northeastern Oklahoma. LAT...LON 3665 9462 3658 9485 3674 9495 3689 9462 TIME...MOT...LOC 0110Z 244DEG 56KT 3670 9482
Special weather statement, May 4, 8:31 PM CDT, 17 minutes before
Special Weather Statement National Weather Service Tulsa OK 831 PM CDT Mon May 4 2020 OKZ067>070-072-050200- Adair OK-Muskogee OK-Sequoyah OK-Cherokee OK-Wagoner OK- 831 PM CDT Mon May 4 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SEQUOYAH...CENTRAL ADAIR...SOUTHEASTERN WAGONER...SOUTHERN CHEROKEE AND NORTHERN MUSKOGEE COUNTIES UNTIL 900 PM CDT... At 831 PM CDT, strong thunderstorms were located along a line extending from 6 miles southeast of Hulbert to near Oktaha. Movement was east at 65 mph. Penny size hail and winds in excess of 40 mph will be possible with these storms. Locations in or near the path include... Muskogee... Tahlequah... Stilwell... Fort Gibson... Okay... Braggs... Greenleaf State Park... Pumpkin Center... Maryetta... Cookson... Cherokee Landing State Park... Sequoyah State Park... Lake Tenkiller State Park... Adair State Park... Wainwright... Summit... A Tornado Watch remains in effect until 1000 PM CDT for northeastern and east central Oklahoma. LAT...LON 3560 9498 3559 9568 3591 9531 3590 9452 TIME...MOT...LOC 0131Z 261DEG 56KT 3585 9507 3560 9546
Local storm report, May 4, 8:45 PM CDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
845 PM CDT MON MAY 4 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0836 PM HAIL 2 WNW TAHLEQUAH 35.93N 95.00W
05/04/2020 E1.00 INCH CHEROKEE OK TRAINED SPOTTER
&&
MATThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:06 PM CDT | Special Weather Statement | TSA | Ottawa | 39 min |
| May 4, 7:14 PM CDT | Special Weather Statement | TSA | Delaware | 31 min |
| May 4, 7:34 PM CDT | Special Weather Statement | TSA | Delaware | 26 min |
| May 4, 7:38 PM CDT | Special Weather Statement | TSA | Okmulgee | 37 min |
| May 4, 7:44 PM CDT | Special Weather Statement | TSA | Wagoner | 31 min |
| May 4, 8:09 PM CDT | Special Weather Statement | TSA | Wagoner | 36 min |
| May 4, 8:10 PM CDT | Special Weather Statement | TSA | Ottawa | 20 min |
| May 4, 8:14 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Wagoner | 46 min |
| May 4, 8:31 PM CDT | Special Weather Statement | TSA | Adair, Cherokee, Muskogee | 29 min |
| May 4, 8:49 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 41 min |
| May 4, 9:00 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Sequoyah | 45 min |
| May 4, 9:29 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 35 min |
| May 4, 10:41 PM CDT | Special Weather Statement | TSA | Sequoyah | 34 min |
| May 4, 10:48 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 27 min |
| May 4, 11:24 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 25 min |
| May 5, 12:41 AM CDT | Special Weather Statement | TSA | Latimer | 34 min |
| May 5, 12:44 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore, Pushmataha | 46 min |
| May 5, 1:33 AM CDT | Special Weather Statement | TSA | LeFlore | 27 min |
| May 5, 4:08 AM CDT | Special Weather Statement | TSA | Pushmataha | 52 min |
| May 5, 4:43 AM CDT | Special Weather Statement | TSA | Choctaw | 47 min |
| May 5, 5:29 AM CDT | Special Weather Statement | TSA | Choctaw | 46 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2020Every severe thunderstorm warning in 2020
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.