Alert archive / Oklahoma / Tornado Watches in 2019

Tornado Watch 199

May 20, 201947 counties in Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this tornado watch at May 20, 2019, 1:37 PM CDT for 47 counties in Oklahoma; 8 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: May 20, 2019, 1:37 PM CDT (18:37 UTC)
Expired: May 20, 2019, 10:00 PM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Particularly dangerous situation: Yes
Largest hail expected: 4 in
Strongest gust expected: 70 kt

All 55 counties

Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 101 km from the middle of the area, began a volume at 18:37 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: 95%
One or more EF2 to EF5 tornadoes: 95%
Ten or more severe wind reports: 95%
One or more gusts of 65 knots or more: 95%
Ten or more severe hail reports: 95%
One or more hailstones of 2 inches or more: 95%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

84 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 20, 2:04 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	56 min
May 20, 2:15 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	45 min
May 20, 2:24 PM CDT	Tornado Warning	OUN	Custer, Ellis, Roger Mills	51 min
May 20, 2:27 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	33 min
May 20, 2:38 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	52 min
May 20, 2:52 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Major, Roger Mills, Woodward	68 min
May 20, 2:53 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	52 min
May 20, 2:55 PM CDT	Tornado Warning	OUN	Canadian, Kingfisher	50 min
May 20, 3:12 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	48 min
May 20, 3:21 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	39 min
May 20, 3:26 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	34 min
May 20, 3:34 PM CDT	Tornado Warning Tornado observed	OUN	Kingfisher, Logan	41 min
May 20, 3:45 PM CDT	Flash Flood Warning	OUN	Garfield, Grant, Kay, Noble	3 hr
May 20, 3:52 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	53 min
May 20, 3:55 PM CDT	Tornado Warning	OUN	Harmon	50 min
May 20, 3:57 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Kingfisher, Major	48 min
May 20, 3:59 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Roger Mills	46 min
May 20, 4:06 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher	24 min
May 20, 4:07 PM CDT	Tornado Warning Tornado observed	OUN	Blaine, Custer, Dewey	24 min
May 20, 4:08 PM CDT	Tornado Warning Tornado observed	OUN	Garfield, Logan, Noble	37 min
May 20, 4:12 PM CDT	Tornado Warning	OUN	Beckham	33 min
May 20, 4:39 PM CDT	Flash Flood Warning	OUN	Alfalfa, Blaine, Garfield, Major	3 hr
May 20, 4:39 PM CDT	Tornado Warning	OUN	Harmon, Jackson	36 min
May 20, 4:41 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey, Major	49 min
May 20, 4:43 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Kingfisher, Major, Noble	47 min
May 20, 4:46 PM CDT	Flash Flood Warning	TSA	Osage, Pawnee	8 hr
May 20, 4:47 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Roger Mills	43 min
May 20, 4:56 PM CDT	Tornado Warning	OUN	Greer, Harmon, Jackson	49 min
May 20, 4:58 PM CDT	Tornado Warning	OUN	Garfield, Logan, Noble, Payne	47 min
May 20, 5:05 PM CDT	Severe Thunderstorm Warning	TSA	Osage	40 min
May 20, 5:21 PM CDT	Flash Flood Warning	OUN	Blaine, Custer, Dewey	2 hr
May 20, 5:21 PM CDT	Tornado Warning Considerable damage threat	OUN	Greer, Kiowa	39 min
May 20, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble, Payne	64 min
May 20, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey, Major, Woodward	49 min
May 20, 5:33 PM CDT	Tornado Warning	TSA	Osage, Pawnee	42 min
May 20, 5:36 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	39 min
May 20, 5:39 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	51 min
May 20, 5:39 PM CDT	Tornado Warning	TSA	Osage, Pawnee	36 min
May 20, 5:46 PM CDT	Tornado Warning	OUN	Beckham, Kiowa, Washita	44 min
May 20, 5:46 PM CDT	Tornado Warning	OUN	Beckham, Greer, Harmon	25 min
May 20, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa, Washita	48 min
May 20, 6:01 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey, Kingfisher	44 min
May 20, 6:01 PM CDT	Tornado Warning	OUN	Greer, Kiowa, Washita	30 min
May 20, 6:08 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble, Payne	52 min
May 20, 6:11 PM CDT	Tornado Warning	TSA	Osage, Pawnee	27 min
May 20, 6:14 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	46 min
May 20, 6:16 PM CDT	Flash Flood Warning	OUN	Blaine, Garfield, Kingfisher, Logan, Major, Noble and 1 more	4 hr
May 20, 6:21 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Greer, Harmon, Washita	24 min
May 20, 6:30 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Washita	45 min
May 20, 6:34 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	26 min
May 20, 6:42 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	18 min
May 20, 6:43 PM CDT	Flash Flood Warning	OUN	Garfield, Grant, Kay, Noble	2 hr
May 20, 6:44 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Kiowa, Washita	46 min
May 20, 6:57 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Osage, Pawnee, Rogers, Tulsa and 1 more	48 min
May 20, 7:04 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Harmon	41 min
May 20, 7:07 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian	38 min
May 20, 7:15 PM CDT	Flash Flood Warning	OUN	Custer, Kiowa, Washita	3 hr
May 20, 7:19 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	26 min
May 20, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	48 min
May 20, 7:40 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	50 min
May 20, 7:43 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee	47 min
May 20, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	45 min
May 20, 7:51 PM CDT	Tornado Warning	OUN	Foard, Knox	39 min
May 20, 7:53 PM CDT	Flash Flood Warning	OUN	Blaine, Caddo, Canadian, Custer, Grady, Kingfisher and 1 more	3 hr
May 20, 7:54 PM CDT	Severe Thunderstorm Warning	OUN	Payne	21 min
May 20, 8:02 PM CDT	Severe Thunderstorm Warning	OUN	Payne	28 min
May 20, 8:03 PM CDT	Tornado Warning	TSA	Creek, Pawnee	42 min
May 20, 8:11 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	38 min
May 20, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Hardeman, Knox, Wilbarger	48 min
May 20, 8:23 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Tulsa, Washington	52 min
May 20, 8:24 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	51 min
May 20, 8:46 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Mayes, Osage, Pawnee, Rogers, Tulsa and 2 more	59 min
May 20, 8:48 PM CDT	Severe Thunderstorm Warning	OUN	Payne	27 min
May 20, 8:49 PM CDT	Flash Flood Warning	TSA	Creek, Mayes, Osage, Pawnee, Rogers, Tulsa and 1 more	6 hr
May 20, 8:54 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	40 min
May 20, 9:02 PM CDT	Flash Flood Warning	OUN	Canadian, Lincoln, Logan, Oklahoma, Payne	4 hr
May 20, 9:06 PM CDT	Tornado Warning	TSA	Mayes, Rogers, Tulsa, Wagoner	39 min
May 20, 9:06 PM CDT	Tornado Warning	TSA	Creek, Osage, Tulsa	24 min
May 20, 9:12 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	48 min
May 20, 9:24 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	36 min
May 20, 9:45 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Tulsa, Wagoner	60 min
May 20, 9:48 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady, Kingfisher	42 min
May 20, 9:54 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	51 min
May 20, 9:57 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Tulsa, Wagoner	63 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 12:00Z, 6.6 hours before the alert went out and 89 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: 79 J/kg
Mixed-layer CIN: -389 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 260 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 11:56 PM CDT	Mesoscale Discussion	SPC	Cimarron	2 hr
May 20, 1:57 AM CDT	Severe Thunderstorm Watch	SPC	Beaver, Cimarron, Texas	8 hr
May 20, 6:14 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 7 more	2 hr
May 20, 7:09 AM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 11 more	6 hr
May 20, 10:41 AM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Jackson, Roger Mills	3 hr
May 20, 11:17 AM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 20 more	2 hr
May 20, 11:35 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Creek, Custer, Dewey, Ellis and 20 more	85 min
May 20, 1:21 PM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Cleveland, Comanche, Grady, Kiowa and 3 more	24 min
May 20, 2:15 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Cimarron, Ellis, Grant, Harper and 3 more	90 min
May 20, 3:46 PM CDT	Mesoscale Discussion	SPC	Canadian, Greer, Harmon, Jackson, Kingfisher, Kiowa and 1 more	59 min
May 20, 4:35 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Delaware, Mayes, Ottawa and 2 more	115 min
May 20, 5:14 PM CDT	Tornado Watch	SPC	Adair, Cherokee, Craig, Delaware, Haskell, Latimer and 11 more	8 hr
May 20, 5:44 PM CDT	Mesoscale Discussion	SPC	Canadian, Greer, Harmon, Jackson, Kingfisher, Kiowa and 1 more	61 min
May 19, 7:21 PM CDT	Mesoscale Discussion	SPC	Harrison, Panola	84 min
May 20, 12:36 PM CDT	Tornado Watch PDS	SPC	Armstrong, Borden, Briscoe, Childress, Collingsworth, Cottle and 34 more	9 hr
May 20, 1:37 PM CDT	Mesoscale Discussion	SPC	Briscoe, Childress, Collingsworth, Cottle, Crosby, Dickens and 11 more	53 min
May 20, 5:08 PM CDT	Mesoscale Discussion	SPC	Crane, Crockett, Glasscock, Midland, Reagan, Terrell and 1 more	2 hr
May 20, 5:50 PM CDT	Mesoscale Discussion	SPC	Borden, Childress, Collingsworth, Cottle, Crosby, Dawson and 18 more	115 min

Nearby

Tornado Watches in Oklahoma, 2019 Tornado Watches in Texas, 2019 Every 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.