Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 368, NWS Norman, OK

May 21, 2019Cleveland County, McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 21, 2019, 3:47 AM CDT for Cleveland County, McClain County, Oklahoma. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 21, 2019, 3:47 AM CDT (08:47 UTC)
Expired: May 21, 2019, 4:30 AM CDT
In force: 43 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Cleveland County, OK, McClain County, OK

The radar

The Norman radar (KTLX), 27 km from the middle of the area, began a volume at 08:50 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
May 20, 10:07 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 8.8 hours before the alert went out and 13 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: 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

Open this sounding in Storm Lab

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 21, 3:19 AM CDT, 28 minutes earlier.

Area forecast discussion, May 21, 3:19 AM CDT, 28 minutes before

Area Forecast Discussion
National Weather Service Norman OK
319 AM CDT Tue May 21 2019

.DISCUSSION...
A convective system associated with a strong upper-level wave and
its related surface cyclone is working its way slowly to the east
across our forecast area early this morning. It currently covers
about the western 2/3 of our area, and should begin to increase
its eastward speed over the next several hours, finally exiting
our area sometime this morning or early this afternoon. A few
showers and thunderstorms will also be possible through the
afternoon in northwest Oklahoma, closer to the wave aloft. Any of
these storms could be severe, as vertical shear remains
impressive.

Heavy rainfall across the region has left the ground extremely
wet, and flooding is already a problem in many areas. Rain chances
continue through nearly all the forecast area this morning. As a
result, the existing Flood Watch will be retained for this
forecast issuance.

Starting tonight, and lasting through Wednesday morning, we get
a short (18 hour) break from thunderstorm chances. Storms should
start to increase again Wednesday afternoon across our central
and southeast counties, then shift northwest as warm and moist air
returns from the southeast. By the end of the day, a warm front
should be near, or north of, the Kansas border, setting the stage
for Thursday.

Another wave aloft, not quite as strong as today's, will arrive in
the area Thursday. With the warm, humid air established across our
forecast area, severe storms will be a significant possibility
again, mainly over northwest Oklahoma.

Despite the departure of that wave, the lingering moisture and
occasional weak disturbances aloft will help maintain at least
slight chances for thunderstorms into early next week.

CmS
&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  75  57  83  69 /  30   0  20  40
Hobart OK         76  54  84  68 /  10   0  20  30
Wichita Falls TX  78  58  87  71 /  10   0  30  30
Gage OK           71  47  82  64 /  40   0  10  30
Ponca City OK     75  54  82  70 /  70   0  20  40
Durant OK         79  60  86  71 /  80   0  20  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch until 1 PM CDT this afternoon for OKZ004>048-050>052.

TX...Flood Watch until 1 PM CDT this afternoon for TXZ083>090.

&&

50/23

Hazardous weather outlook, May 20, 7:51 PM CDT, 7 hours 56 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
751 PM CDT Mon May 20 2019

OKZ004>048-050>052-TXZ083>090-220100-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
751 PM CDT Mon May 20 2019

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Tonight...

.Thunderstorms...
Large hail up to the size of golf balls, damaging wind gusts up to
80 mph, and tornadoes will remain possible tonight. The greatest
risk for tornadoes will be along and just west of I-44 from
central and southwest Oklahoma, to western north Texas until 2
AM. Late tonight, a line of thunderstorms with a continued threat
of damaging winds and tornadoes will move through the entire area.

.Flooding and Heavy Rainfall...
Life threatening flooding and flash flooding remains likely
through the overnight hours. The risk will be particularly high
across central and north central Oklahoma where some areas will
receive more than 5 inches of rainfall. A flood watch remains in
effect until Tuesday afternoon.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel across
the entire area should prepare for severe weather operations
through tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

.Thunderstorms...
After Tuesday, thunderstorms remain in the
forecast into the weekend with a continued risk for severe
thunderstorms, especially on Thursday.

.Flooding and Heavy Rainfall...
After Tuesday, the risk for heavy rainfall and flooding will
continue with periods of showers and thunderstorms expected
through the end of the week.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Local storm report, May 21, 1:56 AM CDT, 1 hour 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
156 AM CDT TUE MAY 21 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0150 AM     TSTM WND GST     3 W GRANDFIELD          34.23N 98.74W
05/21/2019  M74 MPH          TILLMAN            OK   MESONET

            MESONET REPORT

&&

ZWINK

Special weather statement, May 21, 2:31 AM CDT, 1 hour 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
231 AM CDT Tue May 21 2019

OKZ012-013-019-020-026-210800-
Garfield OK-Payne OK-Logan OK-Lincoln OK-Noble OK-
231 AM CDT Tue May 21 2019

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Garfield...
southwestern Payne...Logan...northwestern Lincoln and southwestern
Noble Counties Until 300 AM CDT...

AT 229 AM CDT, a strong thunderstorm was located near Crescent,
moving northeast at 40 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

LAT...LON 3639 9740 3623 9719 3587 9706 3573 9759
      3598 9768 3615 9767
TIME...MOT...LOC 0729Z 229DEG 35KT 3596 9755

MAD

Local storm report, May 21, 2:38 AM CDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
238 AM CDT TUE MAY 21 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0139 AM     FLASH FLOOD      1 ENE WARWICK           35.69N 96.97W
05/21/2019                   LINCOLN            OK   EMERGENCY MNGR

            WATER AND DEBRIS ON ROADWAY AT HIGHWAY 66. THE HIGHWAY
            WAS CLOSED BY ODOT.

&&

BRB

Local storm report, May 21, 2:49 AM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
249 AM CDT TUE MAY 21 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0248 AM     TSTM WND GST     MARLOW                  34.64N 97.96W
05/21/2019  E65 MPH          STEPHENS           OK   PUBLIC

            PUBLIC PHONE CALL

&&

ZWINK

Special weather statement, May 21, 3:09 AM CDT, 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
309 AM CDT Tue May 21 2019

OKZ027>029-039-040-210845-
Grady OK-Stephens OK-Garvin OK-Cleveland OK-McClain OK-
309 AM CDT Tue May 21 2019

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Grady...northeastern
Stephens...northwestern Garvin...central Cleveland and McClain
Counties Until 345 AM CDT...

AT 308 AM CDT, strong thunderstorms were along a line extending from
near Tabler to 6 miles east of Bray, moving northeast at 50 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

LAT...LON 3456 9774 3509 9790 3538 9754 3538 9736
      3483 9719
TIME...MOT...LOC 0808Z 231DEG 43KT 3506 9782 3467 9770

..speg.

Local storm report, May 21, 3:37 AM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
337 AM CDT TUE MAY 21 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0334 AM     FLASH FLOOD      6 W KENDRICK            35.80N 96.88W
05/21/2019                   LINCOLN            OK   EMERGENCY MNGR

            HIGHWAY 18 CLOSED AT 840 ROAD. BRIDGE COMPLETELY
            UNDERWATER.

&&

BRB

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 7:23 PM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Canadian, Custer, Kingfisher, Logan and 1 more	3 hr
May 20, 7:35 PM CDT	Special Weather Statement	OUN	Canadian	25 min
May 20, 7:40 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	50 min
May 20, 7:44 PM CDT	Areal Flood Warning	OUN	Alfalfa, Blaine, Custer, Dewey, Garfield, Grant and 2 more	6 hr
May 20, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	45 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, 8:10 PM CDT	Special Weather Statement	OUN	Logan	35 min
May 20, 8:11 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	38 min
May 20, 8:18 PM CDT	Special Weather Statement	OUN	Oklahoma	27 min
May 20, 8:24 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	51 min
May 20, 8:31 PM CDT	Areal Flood Advisory	OUN	Canadian, Lincoln, Logan, Oklahoma, Payne	4 hr
May 20, 8:48 PM CDT	Areal Flood Warning	OUN	Garfield, Grant, Kay, Noble	5 hr
May 20, 8:48 PM CDT	Severe Thunderstorm Warning	OUN	Payne	27 min
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, 9:12 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	48 min
May 20, 9:43 PM CDT	Special Weather Statement	OUN	Caddo, Canadian, Comanche	32 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, 10:06 PM CDT	Flash Flood Warning	OUN	Garfield, Logan, Noble, Payne	114 min
May 20, 10:14 PM CDT	Areal Flood Warning	OUN	Custer, Kiowa, Washita	9 hr
May 20, 10:22 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	38 min
May 20, 10:34 PM CDT	Special Weather Statement	OUN	Canadian	26 min
May 20, 10:45 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	45 min
May 20, 10:53 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Garvin, Grady, McClain and 1 more	52 min
May 20, 10:58 PM CDT	Flash Flood Warning	OUN	Canadian	10 hr
May 20, 10:59 PM CDT	Special Weather Statement	OUN	Greer	31 min
May 20, 11:18 PM CDT	Areal Flood Advisory	OUN	Cleveland, Oklahoma	3 hr
May 20, 11:26 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	49 min
May 20, 11:29 PM CDT	Special Weather Statement	OUN	Cleveland, McClain, Oklahoma	31 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 21, 12:07 AM CDT	Areal Flood Warning	OUN	Garfield, Logan, Noble, Payne	9 hr
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, 1:22 AM CDT	Flash Flood Warning	OUN	Caddo	4 hr
May 21, 1:43 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Jefferson, Stephens, Tillman	47 min
May 21, 1:55 AM CDT	Areal Flood Warning	OUN	Garfield, Grant, Kay, Noble	6 hr
May 21, 2:27 AM CDT	Severe Thunderstorm Warning	OUN	Grady, Jefferson, Stephens	48 min
May 21, 2:31 AM CDT	Special Weather Statement	OUN	Logan	29 min
May 21, 3:09 AM CDT	Special Weather Statement	OUN	Cleveland, McClain	36 min
May 21, 3:17 AM CDT	Flash Flood Warning	OUN	Noble, Payne	4 hr
May 21, 3:25 AM CDT	Areal Flood Warning	OUN	Cleveland, Oklahoma	5 hr
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 Tornado observed	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, 5:00 AM CDT	Areal Flood Warning	OUN	Canadian, Logan, Oklahoma	3 hr
May 21, 5:37 AM CDT	Special Weather Statement	OUN	Pontotoc	23 min
May 21, 5:41 AM CDT	Areal Flood Warning	OUN	Caddo, Canadian, Kingfisher	3 hr
May 21, 5:58 AM CDT	Special Weather Statement	OUN	Marshall	32 min
May 21, 6:15 AM CDT	Tornado Warning	OUN	Atoka, Bryan, Johnston, Love, Marshall	30 min
May 21, 6:22 AM CDT	Tornado Warning	OUN	Hughes	53 min
May 21, 6:34 AM CDT	Areal Flood Warning	OUN	Cleveland, Pottawatomie	6 hr
May 21, 6:38 AM CDT	Tornado Warning	OUN	Atoka, Bryan, Johnston, Marshall	37 min
May 21, 6:46 AM CDT	Tornado Warning	OUN	Bryan	29 min
May 21, 6:52 AM CDT	Tornado Warning	OUN	Coal, Hughes	45 min
May 21, 6:54 AM CDT	Tornado Warning	OUN	Atoka, Coal, Johnston	36 min
May 21, 7:05 AM CDT	Tornado Warning	OUN	Atoka, Bryan	40 min
May 21, 7:24 AM CDT	Tornado Warning	OUN	Atoka, Coal	24 min
May 21, 7:39 AM CDT	Tornado Warning	OUN	Atoka	27 min
May 21, 7:50 AM CDT	Areal Flood Warning	OUN	Garfield, Grant, Kay, Noble, Payne	6 hr
May 21, 7:56 AM CDT	Areal Flood Warning	OUN	Blaine, Caddo, Canadian, Grady, Kingfisher, Logan and 1 more	6 hr
May 21, 8:10 AM CDT	Areal Flood Warning	OUN	Lincoln	4 hr
May 21, 9:40 AM CDT	River Flood Warning	OUN	Oklahoma	48 hr
May 21, 9:50 AM CDT	River Flood Warning	OUN	Custer, Washita	40 hr
May 21, 10:43 AM CDT	Wind Advisory	OUN	Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 13 more	8 hr
May 21, 11:45 AM CDT	Areal Flood Warning	OUN	Canadian, Cleveland, Oklahoma	3 hr
May 21, 11:59 AM CDT	Areal Flood Warning	OUN	Lincoln	9 hr
May 21, 1:29 PM CDT	Areal Flood Warning	OUN	Canadian, Garfield, Grant, Kay, Kingfisher, Logan and 3 more	12 hr
May 21, 3:19 PM CDT	Special Weather Statement	OUN	Woods	26 min
May 21, 3:39 PM CDT	Special Weather Statement	OUN	Alfalfa, Woods	51 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2019 Every severe thunderstorm warning 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.