Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 129, NWS Norman, OK

April 30, 20195 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 30, 2019, 4:49 PM CDT for 5 counties in Oklahoma. It was in force for 41 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: Apr 30, 2019, 4:49 PM CDT (21:49 UTC)
Expired: Apr 30, 2019, 5:30 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cleveland County, OK, Lincoln County, OK, Logan County, OK, Oklahoma County, OK, Payne County, OK

The radar

The Norman radar (KTLX), 40 km from the middle of the area, began a volume at 21:48 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 30, 12:02 PM CDT	Tornado Watch	SPC	13 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.8 hours before the alert went out and 55 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: 1242 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 541 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.7

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 Apr 30, 2:36 PM CDT, 2 hours 13 minutes earlier.

Area forecast discussion, Apr 30, 2:36 PM CDT, 2 hours 13 minutes before

Area Forecast Discussion
National Weather Service Norman OK
236 PM CDT Tue Apr 30 2019

.DISCUSSION...
Active weather going on this afternoon, so will keep this brief.
Scattered to numerous thunderstorms should continue into early
evening. Expectation is for convection to consolidate along the
front the evening and then move eastward from there. Severe hail,
winds, and a tornado or two are all threats.

With ample moisture in place, convection may continue overnight
over southeast Oklahoma as the shortwave makes its way out. Will
keep the flood watch going with some slight adjustment (bringing
it south to the border).

General trend is for the models to retreat the front Wednesday
afternoon into northern Oklahoma (with the exception of the NAM).
Models suggest some convection may form in southeast Oklahoma as a
vorticity maximum passes over that area of abundant moisture
tomorrow evening. At the same time a cold front will surge south
from Kansas bringing precipitation chances with it overnight into
Thursday morning.

Synoptic pattern remains active into next week, though details
are a bit fuzzy.

Day

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  60  79  59  69 /  60  30  40  30
Hobart OK         57  81  57  66 /  30  20  30  10
Wichita Falls TX  64  82  62  75 /  50  40  20  30
Gage OK           51  79  49  65 /  20  10  30  10
Ponca City OK     57  75  58  68 /  50  20  60  30
Durant OK         66  79  63  77 /  80  50  60  60

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch until 7 PM CDT this evening for OKZ006>008-011>013-
     015>020-022>030-033>038.

     Flood Watch from 7 PM CDT this evening through Wednesday morning
     for OKZ045-050>052.

     Flood Watch through Wednesday morning for OKZ031-032-039>043-
     046>048.

TX...Flood Watch until 7 PM CDT this evening for TXZ083>085.

     Flood Watch from 7 PM CDT this evening through Wednesday morning
     for TXZ090.

&&

30/14

Hazardous weather outlook, Apr 30, 12:27 PM CDT, 4 hours 22 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1227 PM CDT Tue Apr 30 2019

OKZ004>048-050>052-TXZ083>090-011730-
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-
1227 PM CDT Tue Apr 30 2019

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

.DAY ONE...Through Tonight...

.Thunderstorms...
There is an enhanced risk of severe thunderstorms today across
the eastern half of Oklahoma. A slight risk covers the western
half of Oklahoma and western north Texas.

Location...
The enhanced risk area is generally along and east of a Stillwater
to Oklahoma City and Duncan line. The slight risk area is
generally west of the enhanced risk to the Oklahoma and Texas
state line.

Timing...
The most likely time for severe storms will be from now through
Midnight.

Impacts...
Hail up to the size of golf balls.
Damaging winds of 60 to 70 mph.
A few tornadoes possible.
Excessive rainfall with flooding possible.

Discussion...
Scattered to numerous storms are expected to continue through the
afternoon moving east through the evening. Large hail and damaging
wind gusts will be the main threats. For storms that form along or
south of the cold front, there is also a risk for a tornado or two
developing.

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

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...
There is a slight risk of severe thunderstorms on Wednesday mainly
across the eastern half of Oklahoma. A marginal risk covers the
western half of Oklahoma and western north Texas. The most likely
time for severe weather will be during the afternoon and evening.

Thunderstorms remain in the forecast for Thursday through Monday.

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

In the hours before

Special weather statement, Apr 30, 3:43 PM CDT, 1 hour 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
343 PM CDT Tue Apr 30 2019

OKZ007-008-012-302115-
Garfield OK-Kay OK-Grant OK-
343 PM CDT Tue Apr 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR northeastern Garfield...Kay and
eastern Grant Counties Until 415 PM CDT...

AT 341 PM CDT, strong thunderstorms were along a line extending from
4 miles northwest of Braman to 6 miles north of Billings, moving
northeast at 50 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3661 9709 3659 9730 3659 9746 3658 9746
      3657 9758 3700 9755 3700 9702
TIME...MOT...LOC 2041Z 231DEG 45KT 3697 9738 3662 9743

30

Local storm report, Apr 30, 3:52 PM CDT, 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
352 PM CDT TUE APR 30 2019

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

0343 PM     HAIL             7 S HOLLISTER           34.25N 98.87W
04/30/2019  E1.75 INCH       TILLMAN            OK   EMERGENCY MNGR

            HWY 54 AND HWY 70

&&

JT

Special weather statement, Apr 30, 3:57 PM CDT, 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
357 PM CDT Tue Apr 30 2019

OKZ027-038-039-044-045-302130-
Grady OK-Cotton OK-Stephens OK-Comanche OK-Jefferson OK-
357 PM CDT Tue Apr 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR southwestern Grady...eastern
Cotton...western Stephens...southeastern Comanche and northwestern
Jefferson Counties Until 430 PM CDT...

AT 355 PM CDT, strong thunderstorms were along a line extending from
9 miles south of Sterling to 6 miles east of Randlett, moving
northeast at 20 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Storm intensity is increasing and severe weather may develop rapidly.
Stay alert and listen for warnings.

&&

LAT...LON 3409 9850 3471 9828 3488 9789 3420 9806
      3414 9831 3415 9833 3416 9837 3415 9839
      3413 9838 3413 9839 3411 9840
TIME...MOT...LOC 2055Z 241DEG 16KT 3462 9821 3416 9835

BRB

Local storm report, Apr 30, 3:59 PM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
359 PM CDT TUE APR 30 2019

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

0354 PM     HAIL             MUSTANG                 35.39N 97.72W
04/30/2019  E1.00 INCH       CANADIAN           OK   BROADCAST MEDIA

&&

JT

Special weather statement, Apr 30, 4:06 PM CDT, 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
406 PM CDT Tue Apr 30 2019

OKZ027-028-040-302130-
Grady OK-Garvin OK-McClain OK-
406 PM CDT Tue Apr 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR eastern Grady...northwestern
Garvin and southwestern McClain Counties Until 430 PM CDT...

AT 405 PM CDT, a strong thunderstorm was located near Lindsay, moving
northeast at 40 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3476 9772 3514 9756 3502 9735 3499 9734
      3497 9734 3472 9759
TIME...MOT...LOC 2105Z 209DEG 36KT 3485 9763

30

Special weather statement, Apr 30, 4:41 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
441 PM CDT Tue Apr 30 2019

TXZ086-089-090-302215-
Clay TX-Wichita TX-Archer TX-
441 PM CDT Tue Apr 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR west central Clay...southeastern
Wichita and northeastern Archer Counties Until 515 PM CDT...

AT 440 PM CDT, a strong thunderstorm was located near Scotland,
moving northeast at 25 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Storm intensity is increasing and severe weather may develop rapidly.
Stay alert and listen for warnings.

&&

LAT...LON 3361 9854 3372 9860 3399 9833 3379 9811
TIME...MOT...LOC 2140Z 227DEG 22KT 3370 9847

BRB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 12:12 AM CDT	Special Weather Statement	OUN	Blaine	33 min
Apr 30, 3:32 AM CDT	Special Weather Statement	OUN	Garfield	28 min
Apr 30, 5:07 AM CDT	Areal Flood Advisory	OUN	Garfield	113 min
Apr 30, 9:13 AM CDT	Special Weather Statement	OUN	Ellis, Harper	32 min
Apr 30, 9:35 AM CDT	Special Weather Statement	OUN	Oklahoma	25 min
Apr 30, 10:02 AM CDT	Areal Flood Advisory	OUN	Logan, Oklahoma	3 hr
Apr 30, 10:02 AM CDT	Special Weather Statement	OUN	Cleveland	13 min
Apr 30, 10:04 AM CDT	Special Weather Statement	OUN	Grady	26 min
Apr 30, 10:07 AM CDT	Special Weather Statement	OUN	Oklahoma	23 min
Apr 30, 10:12 AM CDT	Special Weather Statement	OUN	Cleveland	33 min
Apr 30, 10:27 AM CDT	Special Weather Statement	OUN	Lincoln	33 min
Apr 30, 10:32 AM CDT	Special Weather Statement	OUN	Cleveland	28 min
Apr 30, 10:35 AM CDT	Special Weather Statement	OUN	Oklahoma, Payne	25 min
Apr 30, 10:54 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma	51 min
Apr 30, 10:56 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	49 min
Apr 30, 10:58 AM CDT	River Flood Warning	OUN	Grant, Kay, Noble	67 hr
Apr 30, 10:58 AM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	47 min
Apr 30, 10:59 AM CDT	River Flood Warning	OUN	Kingfisher, Logan	48 hr
Apr 30, 11:00 AM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	27 hr
Apr 30, 11:16 AM CDT	Tornado Warning	OUN	Lincoln, Payne	44 min
Apr 30, 11:30 AM CDT	Special Weather Statement	OUN	Murray	30 min
Apr 30, 11:44 AM CDT	Severe Thunderstorm Warning	OUN	Payne	31 min
Apr 30, 11:49 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Murray, Pontotoc	41 min
Apr 30, 11:50 AM CDT	Tornado Warning	OUN	Lincoln, Payne	40 min
Apr 30, 11:58 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	47 min
Apr 30, 12:08 PM CDT	Tornado Warning	OUN	Johnston, Murray, Pontotoc	37 min
Apr 30, 12:30 PM CDT	Severe Thunderstorm Warning	OUN	Payne	15 min
Apr 30, 12:35 PM CDT	Tornado Warning	OUN	Pontotoc	25 min
Apr 30, 12:42 PM CDT	Special Weather Statement	OUN	Dewey	33 min
Apr 30, 12:53 PM CDT	Special Weather Statement	OUN	Lincoln	22 min
Apr 30, 1:19 PM CDT	Special Weather Statement	OUN	Payne	26 min
Apr 30, 1:26 PM CDT	Special Weather Statement	OUN	Major	34 min
Apr 30, 1:37 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	38 min
Apr 30, 2:11 PM CDT	Special Weather Statement	OUN	Alfalfa, Woods	49 min
Apr 30, 2:23 PM CDT	River Flood Warning	OUN	Atoka	5 days
Apr 30, 2:33 PM CDT	Special Weather Statement	OUN	Garfield	27 min
Apr 30, 3:00 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	45 min
Apr 30, 3:06 PM CDT	Special Weather Statement	OUN	Canadian, Grady, McClain	24 min
Apr 30, 3:10 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	50 min
Apr 30, 3:33 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady, Oklahoma	42 min
Apr 30, 3:35 PM CDT	Tornado Warning	OUN	Cotton, Tillman	40 min
Apr 30, 3:43 PM CDT	Special Weather Statement	OUN	Kay	32 min
Apr 30, 3:47 PM CDT	Areal Flood Advisory	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	3 hr
Apr 30, 3:57 PM CDT	Special Weather Statement	OUN	Cotton	33 min
Apr 30, 4:00 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	45 min
Apr 30, 4:03 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	42 min
Apr 30, 4:06 PM CDT	Special Weather Statement	OUN	McClain	24 min
Apr 30, 4:06 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Grady, Stephens	39 min
Apr 30, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Logan, Oklahoma	52 min
Apr 30, 4:12 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain	48 min
Apr 30, 4:24 PM CDT	Flash Flood Warning	OUN	Canadian, Cleveland, Oklahoma	3 hr
Apr 30, 4:31 PM CDT	Tornado Warning	OUN	Cotton	29 min
Apr 30, 4:32 PM CDT	Areal Flood Advisory	OUN	Lincoln, Logan, Noble, Oklahoma, Payne	3 hr
Apr 30, 4:48 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Stephens	42 min
Apr 30, 4:51 PM CDT	Special Weather Statement	OUN	Grady	24 min
Apr 30, 4:56 PM CDT	Tornado Warning	OUN	Cotton, Jefferson, Stephens	24 min
Apr 30, 5:05 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Cotton, Grady, Jefferson, McClain and 2 more	115 min
Apr 30, 5:16 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	44 min
Apr 30, 5:22 PM CDT	Areal Flood Advisory	OUN	Cleveland, Garvin, Grady, McClain, Oklahoma, Pottawatomie and 1 more	3 hr
Apr 30, 5:23 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Pottawatomie	52 min
Apr 30, 5:26 PM CDT	Flash Flood Warning	OUN	Comanche, Cotton, Stephens	2 hr
Apr 30, 5:33 PM CDT	Areal Flood Advisory	OUN	Cotton, Tillman	117 min
Apr 30, 5:50 PM CDT	Severe Thunderstorm Warning	OUN	Love	30 min
Apr 30, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	48 min
Apr 30, 6:01 PM CDT	Flash Flood Warning	OUN	Lincoln, Logan, Oklahoma, Payne	119 min
Apr 30, 6:18 PM CDT	Special Weather Statement	OUN	Lincoln	27 min
Apr 30, 6:25 PM CDT	Special Weather Statement	OUN	Marshall	20 min
Apr 30, 6:46 PM CDT	Special Weather Statement	OUN	Cotton	29 min
Apr 30, 6:50 PM CDT	Areal Flood Advisory	OUN	Cleveland, Lincoln, Pottawatomie, Seminole	3 hr
Apr 30, 6:54 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	51 min
Apr 30, 6:55 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	50 min
Apr 30, 3:38 PM CDT	Special Weather Statement	OUN	Wichita	37 min
Apr 30, 4:41 PM CDT	Special Weather Statement	OUN	Clay	34 min
Apr 30, 5:10 PM CDT	Special Weather Statement	OUN	Wilbarger	35 min
Apr 30, 5:45 PM CDT	Special Weather Statement	OUN	Knox	30 min
Apr 30, 6:16 PM CDT	Special Weather Statement	OUN	Knox	29 min
Apr 30, 6:44 PM CDT	Special Weather Statement	OUN	Knox	31 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.