Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 162, NWS Norman, OK

May 1, 2019Cleveland County, McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 1, 2019, 2:57 PM CDT for Cleveland County, McClain County, Oklahoma. It was in force for 12 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 1, 2019, 2:57 PM CDT (19:57 UTC)
Expired: May 1, 2019, 3:09 PM CDT
In force: 12 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 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 19:56 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 1, 1:00 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.0 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: 171 J/kg
Mixed-layer CIN: -285 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

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 1, 1:01 PM CDT, 1 hour 56 minutes earlier.

Area forecast discussion, May 1, 1:01 PM CDT, 1 hour 56 minutes before

Area Forecast Discussion
National Weather Service Norman OK
101 PM CDT Wed May 1 2019

.DISCUSSION...
See aviation.

&&

.AVIATION...
All of our terminals will remain under MVFR to IFR conditions
through the entire forecast period. A persisting storm system will
maintain low ceilings and periodic low visiblities mainly
occurring in rain. The next round of TSRA is expected to develop
between 19Z to 21Z which could affect our terminals in central
through southern Oklahoma and north Texas. The second and final
round of TSRA will be possible along the cold front which will be
pushing through between 06Z to 12Z, and may affect all of our
terminals. Surface winds will remain southeasterly across our
terminals, with a northeast wind shift occurring along the cold
front later tonight.

&&

.PREV DISCUSSION... /issued 655 AM CDT Wed May 1 2019/

DISCUSSION...
12Z TAFs.

AVIATION...
Widespread IFR ceilings are expected today. Additional showers and
thunderstorms are expected to develop this evening and overnight.

PREV DISCUSSION... /issued 420 AM CDT Wed May 1 2019/

DISCUSSION...
Elevated storms that formed across southwest Oklahoma and western
north Texas late yesterday, have increased in coverage overnight.
The stronger storms have produce marginally severe hail, heavy
rainfall, and gusty winds. A few CAMs that have a decent handle on
the current convection, linger storms across parts of southeast
Oklahoma through at least 15Z. Therefore, will likely extend the
current Flood Watch through about noon/1pm.

The area will remain on the southern fringe of broad cyclonic
flow through about Friday with upstream shortwave ridge going into
the weekend. This will result in a few more opportunities for
convection to develop before thunderstorm chances decrease going
into the weekend/early next week.

Compared with yesterday, forcing will be weaker with fewer storms
than Tuesday. The intersection of a dryline and remnant boundary
near western north Texas, may result in storm initiation during
the afternoon. How much upscale growth occurs across northern
Texas and southern Oklahoma is uncertain. However, moderate
instability and shear will certainly support the risk of severe
storms with the potential for very large hail, damaging winds, and
heavy rainfall.

Later this evening and overnight, a disturbance will move across the
central Rockies. This will help force another front across
Oklahoma during the evening and overnight. Will increase rain and
storm chances across northern Oklahoma, mainly for the overnight
period.

Another wave will approach and move across the southern and central
Plains late Thursday into Friday.  This will help sharpen an elevated
front, which may result in at least scattered showers and thunderstorms.

There are some indication that storms may form to the west of Oklahoma
late Saturday into early Sunday. With west to northwest flow
aloft, some of the storms may move into Oklahoma overnight
Saturday into Sunday morning.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  75  60  70  57 /  30  50  20  30
Hobart OK         75  58  67  55 /  20  50  20  40
Wichita Falls TX  77  62  75  61 /  40  30  30  40
Gage OK           67  48  65  48 /  10  70  10  50
Ponca City OK     71  56  68  55 /  20  70  20  30
Durant OK         77  64  78  63 /  60  60  50  40

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch through Thursday morning for OKZ023>032-037>048-
     050>052.

TX...Flood Watch through Thursday morning for TXZ085-086-088>090.

&&

12/23/68

Hazardous weather outlook, May 1, 1:42 PM CDT, 1 hour 15 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
142 PM CDT Wed May 1 2019

OKZ004>048-050>052-TXZ083>090-020500-
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-
142 PM CDT Wed May 1 2019

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

.DAY ONE...Today and Tonight...

.Thunderstorms...
There is an enhanced risk of severe thunderstorms today across
parts of western north Texas and southern Oklahoma. There is also
a slight risk for the rest of southern Oklahoma and portions of
central Oklahoma. A few marginally severe storms may develop
across northern Oklahoma.

Location...
The enhanced risk area is generally along and south of a Wichita
Falls to Seymour, Texas line. The slight risk area is generally
along and south of a line from near Vernon to Pauls Valley to
Durant.

Timing...
Storms are expected to continue through about midnight.

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

Discussion...
Thunderstorms developed across portions of north Texas, southern,
and central Oklahoma early this afternoon. Storms may become more
numerous by late afternoon or evening. Other storms may form
across northern Oklahoma late this evening and overnight, as a
cold front moves across the area.

.Heavy Rain...
Heavy rainfall amounts could occur with thunderstorms this
afternoon and evening. Flooding is most likely in areas that have
saturated ground from previous rain. Widespread flash flooding is
unlikely, but localized flash flooding is likely to occur.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

.Thunderstorms...
Thunderstorms are possible across southern Oklahoma and north
Texas Thursday, and again across portions of the area Friday
through about Sunday.

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, May 1, 2:46 PM CDT, 11 minutes before

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Local storm report, May 1, 2:48 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
248 PM CDT WED MAY 1 2019

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

0240 PM     HAIL             3 SW MERIDIAN           35.81N 97.28W
05/01/2019  M3.00 INCH       LOGAN              OK   BROADCAST MEDIA

            MEASURED 3.5 IN.

&&

JP

Local storm report, May 1, 2:52 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
252 PM CDT WED MAY 1 2019

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

0251 PM     HAIL             5 W HOLLIDAY            33.81N 98.78W
05/01/2019  E0.75 INCH       ARCHER             TX   FIRE DEPT/RESCUE

&&

JT

Local storm report, May 1, 2:53 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
253 PM CDT WED MAY 1 2019

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

0252 PM     HAIL             WICHITA FALLS           33.89N 98.51W
05/01/2019  E0.75 INCH       WICHITA            TX   TRAINED SPOTTER

&&

JT

Local storm report, May 1, 2:55 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
255 PM CDT WED MAY 1 2019

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

0254 PM     HAIL             WICHITA FALLS           33.89N 98.51W
05/01/2019  E1.00 INCH       WICHITA            TX   TRAINED SPOTTER

            NICKEL AND QUARTER SIZE HAIL IN CENTRAL WICHITA FALLS

&&

JT

Local storm report, May 1, 2:57 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
257 PM CDT WED MAY 1 2019

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

0256 PM     HAIL             1 S WASHINGTON          35.04N 97.48W
05/01/2019  E1.00 INCH       MCCLAIN            OK   PUBLIC

&&

JT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:00 PM CDT	Special Weather Statement	OUN	Caddo	30 min
Apr 30, 7:02 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie, Seminole	43 min
Apr 30, 7:14 PM CDT	Flash Flood Warning	OUN	Cleveland, McClain, Pottawatomie	3 hr
Apr 30, 7:22 PM CDT	Flash Flood Warning	OUN	Carter, Cotton, Garvin, Grady, Jefferson, McClain and 1 more	3 hr
Apr 30, 7:46 PM CDT	Special Weather Statement	OUN	Cotton	29 min
Apr 30, 7:49 PM CDT	Special Weather Statement	OUN	Comanche	26 min
Apr 30, 7:51 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	39 min
Apr 30, 7:53 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton	2 hr
Apr 30, 8:20 PM CDT	Areal Flood Advisory	OUN	Garvin, Hughes, McClain, Pontotoc, Pottawatomie, Seminole	115 min
Apr 30, 8:28 PM CDT	Special Weather Statement	OUN	Jefferson	32 min
Apr 30, 8:35 PM CDT	Areal Flood Advisory	OUN	Carter, Cotton, Garvin, Jefferson, Murray, Pontotoc and 1 more	3 hr
Apr 30, 8:35 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	40 min
Apr 30, 8:59 PM CDT	Areal Flood Advisory	OUN	Atoka, Bryan, Carter, Coal, Jefferson, Johnston and 3 more	3 hr
Apr 30, 9:07 PM CDT	Tornado Warning	OUN	Atoka, Bryan	23 min
Apr 30, 9:12 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Johnston	48 min
Apr 30, 9:14 PM CDT	Tornado Warning	OUN	Atoka, Coal	46 min
Apr 30, 9:22 PM CDT	Flash Flood Warning	OUN	Carter, Murray	3 hr
Apr 30, 9:25 PM CDT	Tornado Warning Tornado observed	OUN	Atoka, Bryan	50 min
Apr 30, 9:44 PM CDT	Areal Flood Advisory	OUN	Atoka, Coal, Hughes, Johnston, Pontotoc, Seminole	3 hr
Apr 30, 9:52 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes	18 min
Apr 30, 10:16 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	44 min
Apr 30, 10:31 PM CDT	Areal Flood Warning	OUN	Atoka, Bryan, Carter, Coal, Johnston, Marshall and 2 more	3 hr
Apr 30, 10:48 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	42 min
Apr 30, 11:24 PM CDT	Flash Flood Warning	OUN	Atoka, Carter, Coal, Johnston, Murray	4 hr
Apr 30, 11:26 PM CDT	Special Weather Statement	OUN	Jackson	34 min
Apr 30, 11:39 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	51 min
Apr 30, 11:54 PM CDT	Flash Flood Warning	OUN	Atoka, Coal	4 hr
May 1, 12:07 AM CDT	Special Weather Statement	OUN	Kiowa	23 min
May 1, 12:37 AM CDT	Special Weather Statement	OUN	Comanche	23 min
May 1, 12:50 AM CDT	Special Weather Statement	OUN	Kiowa	25 min
May 1, 1:04 AM CDT	Special Weather Statement	OUN	Hughes, Seminole	26 min
May 1, 1:05 AM CDT	Special Weather Statement	OUN	Comanche	25 min
May 1, 1:07 AM CDT	Special Weather Statement	OUN	Comanche	23 min
May 1, 1:18 AM CDT	Areal Flood Advisory	OUN	Comanche	117 min
May 1, 1:24 AM CDT	Special Weather Statement	OUN	Grady, Stephens	36 min
May 1, 1:48 AM CDT	Special Weather Statement	OUN	Cleveland, McClain	27 min
May 1, 1:56 AM CDT	Areal Flood Advisory	OUN	Stephens	2 hr
May 1, 2:04 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain	26 min
May 1, 2:06 AM CDT	Special Weather Statement	OUN	Cleveland	24 min
May 1, 2:24 AM CDT	River Flood Warning	OUN	Comanche, Cotton	26 hr
May 1, 2:35 AM CDT	River Flood Warning	OUN	Bryan	3 days
May 1, 2:35 AM CDT	Special Weather Statement	OUN	Garvin, Murray, Pottawatomie	25 min
May 1, 2:37 AM CDT	River Flood Warning	OUN	Atoka	27 hr
May 1, 3:05 AM CDT	Special Weather Statement	OUN	Murray	25 min
May 1, 3:07 AM CDT	Special Weather Statement	OUN	Hughes, Seminole	23 min
May 1, 3:27 AM CDT	Areal Flood Warning	OUN	Atoka, Carter, Coal, Johnston, Murray	3 hr
May 1, 3:43 AM CDT	Special Weather Statement	OUN	Murray	32 min
May 1, 4:55 AM CDT	Flash Flood Warning	OUN	Atoka, Coal, Hughes, Johnston, Pontotoc	3 hr
May 1, 6:26 AM CDT	Flash Flood Warning	OUN	Atoka, Coal	3 hr
May 1, 9:06 AM CDT	River Flood Warning	OUN	Cotton	11 hr
May 1, 10:25 AM CDT	Special Weather Statement	OUN	Coal	35 min
May 1, 11:08 AM CDT	Special Weather Statement	OUN	Atoka	37 min
May 1, 12:23 PM CDT	Special Weather Statement	OUN	Stephens	22 min
May 1, 12:39 PM CDT	Special Weather Statement	OUN	Garvin	21 min
May 1, 12:52 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	38 min
May 1, 12:58 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray, Stephens	47 min
May 1, 1:18 PM CDT	Severe Thunderstorm Warning	OUN	Grady, McClain	42 min
May 1, 1:29 PM CDT	Tornado Warning Tornado observed	OUN	Jefferson	31 min
May 1, 1:37 PM CDT	Tornado Warning	OUN	Garvin	53 min
May 1, 1:41 PM CDT	Areal Flood Advisory	OUN	Carter, Garvin, Grady, Jefferson, Stephens	3 hr
May 1, 1:41 PM CDT	Tornado Warning	OUN	Cotton, Jefferson, Stephens	19 min
May 1, 1:54 PM CDT	Severe Thunderstorm Warning	OUN	Grady, McClain	51 min
May 1, 1:58 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain	47 min
May 1, 2:01 PM CDT	Tornado Warning	OUN	Carter, Jefferson, Stephens	44 min
May 1, 2:02 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	43 min
May 1, 2:10 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson	50 min
May 1, 2:27 PM CDT	Severe Thunderstorm Warning	OUN	McClain	33 min
May 1, 2:40 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain	29 min
May 1, 2:42 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pottawatomie	20 min
May 1, 2:43 PM CDT	Flash Flood Warning	OUN	Carter, Garvin, Grady, Stephens	3 hr
May 1, 2:43 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	20 min
May 1, 2:47 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Stephens	58 min
May 1, 2:49 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	41 min
May 1, 2:54 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	30 min
May 1, 3:18 PM CDT	Tornado Warning	OUN	Carter, Stephens	27 min
May 1, 3:19 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Love	41 min
May 1, 3:39 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	66 min
May 1, 3:42 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	48 min
May 1, 3:48 PM CDT	Tornado Warning	OUN	Carter, Stephens	27 min
May 1, 3:52 PM CDT	Areal Flood Advisory	OUN	Carter, Garvin, Murray	3 hr

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.