Alert archive / Oklahoma / Tornado Watches in 2019
Tornado Watch 203
The Storm Prediction Center issued this tornado watch at May 20, 2019, 10:07 PM CDT for 24 counties in Oklahoma; 6 counties in Texas. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2019, 10:07 PM CDT (03:07 UTC)
- Expired
- May 21, 2019, 7:00 AM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 30 counties
Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Okfuskee County, OK, Okmulgee County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Norman radar (KTLX), 74 km from the middle of the area, began a volume at 03:09 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
42 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 10:07 PM CDT | Tornado Warning | TSA | Okmulgee, Tulsa, Wagoner | 38 min |
| May 20, 10:22 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 38 min |
| May 20, 10:32 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers, Tulsa, Wagoner | 43 min |
| May 20, 10:40 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox, Wilbarger | 50 min |
| May 20, 10:45 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Canadian, Grady | 45 min |
| May 20, 10:45 PM CDT | Tornado Warning | OUN | Knox | 17 min |
| May 20, 10:53 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Cotton, Garvin, Grady, McClain and 1 more | 52 min |
| May 20, 11:14 PM CDT | Flash Flood Warning | TSA | Osage, Pawnee, Tulsa, Washington | 6 hr |
| May 20, 11:26 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 49 min |
| May 20, 11:28 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox | 36 min |
| May 20, 11:30 PM CDT | Flash Flood Warning | OUN | Cleveland, Oklahoma | 4 hr |
| May 20, 11:41 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Grady, McClain, Oklahoma, Pottawatomie | 37 min |
| May 20, 11:44 PM CDT | Flash Flood Warning | TSA | Mayes, Osage, Rogers, Tulsa, Wagoner | 6 hr |
| May 20, 11:44 PM CDT | Flash Flood Warning | OUN | Knox | 4 hr |
| May 21, 12:18 AM CDT | Severe Thunderstorm Warning | OUN | Knox | 42 min |
| May 21, 1:00 AM CDT | Flash Flood Warning | OUN | Canadian, Lincoln, Logan, Oklahoma, Payne | 4 hr |
| May 21, 1:03 AM CDT | Severe Thunderstorm Warning | OUN | Tillman | 42 min |
| May 21, 1:05 AM CDT | Flash Flood Warning | TSA | Muskogee, Okmulgee, Tulsa, Wagoner | 6 hr |
| May 21, 1:38 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 27 min |
| May 21, 1:43 AM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Jefferson, Stephens, Tillman | 47 min |
| May 21, 2:27 AM CDT | Severe Thunderstorm Warning | OUN | Grady, Jefferson, Stephens | 48 min |
| May 21, 2:38 AM CDT | Flash Flood Warning | TSA | Creek, Tulsa | 6 hr |
| May 21, 3:47 AM CDT | Severe Thunderstorm Warning | OUN | Cleveland, McClain | 43 min |
| May 21, 4:08 AM CDT | Tornado Warning | OUN | Cleveland | 14 min |
| May 21, 4:24 AM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, Oklahoma, Pottawatomie | 51 min |
| May 21, 4:26 AM CDT | Tornado Warning | OUN | Cleveland, Oklahoma, Pottawatomie | 34 min |
| May 21, 4:45 AM CDT | Severe Thunderstorm Warning | OUN | Hughes, Lincoln, Pottawatomie, Seminole | 45 min |
| May 21, 4:52 AM CDT | Tornado Warning | OUN | Lincoln | 23 min |
| May 21, 4:54 AM CDT | Flash Flood Warning | OUN | Lincoln | 3 hr |
| May 21, 4:59 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 46 min |
| May 21, 5:07 AM CDT | Flash Flood Warning | TSA | Osage, Pawnee, Tulsa, Washington | 6 hr |
| May 21, 5:24 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee, Okmulgee, Tulsa | 51 min |
| May 21, 5:27 AM CDT | Flash Flood Warning | TSA | Mayes, Osage, Rogers, Tulsa, Wagoner | 6 hr |
| May 21, 6:00 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Mayes, Muskogee, Okfuskee, Okmulgee, Osage and 4 more | 60 min |
| May 21, 6:15 AM CDT | Tornado Warning | OUN | Atoka, Bryan, Johnston, Love, Marshall | 30 min |
| May 21, 6:17 AM CDT | Tornado Warning | TSA | Rogers, Tulsa | 43 min |
| May 21, 6:22 AM CDT | Tornado Warning | OUN | Hughes | 53 min |
| May 21, 6:38 AM CDT | Tornado Warning | OUN | Atoka, Bryan, Johnston, Marshall | 37 min |
| May 21, 6:43 AM CDT | Tornado Warning | TSA | Mayes, Nowata, Rogers, Tulsa, Washington | 47 min |
| May 21, 6:52 AM CDT | Tornado Warning | OUN | Coal, Hughes | 45 min |
| May 21, 6:53 AM CDT | Flash Flood Warning | TSA | Muskogee, Okmulgee, Tulsa, Wagoner | 3 hr |
| May 21, 6:54 AM CDT | Tornado Warning | OUN | Atoka, Coal, Johnston | 36 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 3.1 hours before the alert went out and 61 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
- 3095 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 733 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 420 m²/s²
- 0-3 km storm-relative helicity
- 523 m²/s²
- Significant tornado parameter
- 10.8
- Supercell composite
- 43.6
The text
As transmitted.
418
WWUS20 KWNS 210305
SEL3
SPC WW 210305
OKZ000-TXZ000-211000-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 203
NWS Storm Prediction Center Norman OK
1005 PM CDT Mon May 20 2019
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Southern and East-Central Oklahoma
Western North Texas
* Effective this Monday night and Tuesday morning from 1005 PM
until 500 AM CDT.
* Primary threats include...
A few tornadoes and a couple intense tornadoes possible
Scattered damaging wind gusts to 70 mph likely
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY...A mixed mode of storms including a few supercells and
bowing segments will continue to move east-northeastward across the
region into the overnight. A few tornadoes remain a possibility,
with damaging winds and isolated large hail a possibility.
The tornado watch area is approximately along and 60 statute miles
north and south of a line from 50 miles east southeast of Chandler
OK to 50 miles south southwest of Altus OK. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU3).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 200...WW 201...WW 202...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 22030.
...GuyerSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 7:38 PM CDT | Mesoscale Discussion | SPC | Canadian, Greer, Harmon, Jackson, Kingfisher, Kiowa and 1 more | 97 min |
| May 20, 8:22 PM CDT | Mesoscale Discussion | SPC | Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 40 more | 53 min |
| May 20, 10:30 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 10 more | 60 min |
| May 20, 11:06 PM CDT | Mesoscale Discussion | SPC | Delaware | 24 min |
| May 21, 12:18 AM CDT | Tornado Watch | SPC | Adair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 5 more | 5 hr |
| May 21, 2:24 AM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Coal, Cotton, Garvin, Grady and 11 more | 96 min |
| May 21, 4:56 AM CDT | Mesoscale Discussion | SPC | Creek, Hughes, Lincoln, McIntosh, Okfuskee, Okmulgee and 2 more | 64 min |
| May 21, 5:09 AM CDT | Tornado Watch | SPC | Adair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more | 9 hr |
| May 21, 7:26 AM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 21 more | 94 min |
| May 20, 8:53 PM CDT | Mesoscale Discussion | SPC | Borden, Dawson, Fisher, Garza, Glasscock, Haskell and 15 more | 97 min |
| May 20, 9:52 PM CDT | Tornado Watch | SPC | Borden, Brown, Callahan, Coke, Coleman, Concho and 33 more | 6 hr |
| May 20, 11:31 PM CDT | Mesoscale Discussion | SPC | Borden, Callahan, Coke, Coleman, Crane, Crockett and 25 more | 59 min |
| May 20, 11:41 PM CDT | Mesoscale Discussion | SPC | Borden, Callahan, Coke, Coleman, Crane, Crockett and 25 more | 64 min |
Nearby
Tornado Watches in Oklahoma, 2019Tornado Watches in Texas, 2019Every tornado watch in 2019
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.