Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 939, NWS Norman, OK

October 20, 2019Atoka County, Bryan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Oct 20, 2019, 11:44 PM CDT for Atoka County, Bryan County, Oklahoma. It was in force for 46 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: Oct 20, 2019, 11:44 PM CDT (04:44 UTC)
Expired: Oct 21, 2019, 12:30 AM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Atoka County, OK, Bryan County, OK

The radar

The Norman radar (KTLX), 166 km from the middle of the area, began a volume at 04:44 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
Oct 20, 8:27 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.7 hours before the alert went out and 164 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: 760 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1785 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 425 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.8

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 Oct 20, 10:51 PM CDT, 53 minutes earlier.

Area forecast discussion, Oct 20, 10:51 PM CDT, 53 minutes before

Area Forecast Discussion
National Weather Service Norman OK
1051 PM CDT Sun Oct 20 2019

.UPDATE...
Slight changes to temperature, wind, and cloudcover.

&&

.DISCUSSION...

As of 0345Z, the cold front has passed the OKC metro and is
approaching east-central Oklahoma where the line of severe
thunderstorms are currently located from Holdenville-Wynnewood-
Ardmore. These storms are expected to exit the FA by 2-3AM
Monday. Overnight low temperatures are expected to drop to the low
40s across far NW OK, the upper 40s across central OK, and low 50s
across east-central OK.

Thompson

&&

.PREV DISCUSSION... /issued 609 PM CDT Sun Oct 20 2019/

AVIATION...
A wind shift from the NNW will accompany a cold front over the
next several hours for all terminals. In addition, thunderstorms
are expected to develop along this cold front mainly near OKC/OUN
and PNC. Some hail will be possible and will monitor closely for
amendments. Most of the showers and storms should move out of the
terminals after 04Z. Some LLWS will also be possible behind the
front around 08-12Z early Mon morning.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  47  69  41  71 /  40   0   0   0
Hobart OK         46  72  39  73 /  10   0   0   0
Wichita Falls TX  49  74  43  75 /  40   0   0   0
Gage OK           42  68  35  71 /  10   0   0   0
Ponca City OK     47  67  38  67 /  20   0   0   0
Durant OK         52  74  44  74 /  90   0   0   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...None.
TX...None.
&&

26/01

Hazardous weather outlook, Oct 20, 12:01 PM CDT, 11 hours 43 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1201 PM CDT Sun Oct 20 2019

OKZ004>048-050>052-TXZ083>090-211715-
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-
1201 PM CDT Sun Oct 20 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 this evening and
tonight across east-central and southeast Oklahoma, including the
area southeast of a line from Seminole to Ada and Sulphur to
Ardmore. There is a slight risk extending northwest to a line from
Chandler and Pauls Valley to Waurika with a marginal risk northwest
to a Ripley and Choctaw to Norman and Wichita Falls line.

Strong to severe thunderstorms are expected ahead of a cold front
this evening and tonight, mainly after 7 pm, across portions of
east-central and southeast Oklahoma. Significant hail (greater
than 2 inches in diameter), damaging wind gusts, and isolated
tornadoes are possible with these storms. The greatest tornado
potential will be in the enhanced risk area.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

Storm spotter groups and emergency management personnel should
prepare for severe weather operations after 7 PM.

.Fire Weather...
Low relative humidity (15-30 percent) and breezy southerly winds
(15-25 miles per hour) will create an elevated fire weather
environment day across western Oklahoma and western north Texas
today.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

.Thunderstorms...
There is a chance for isolated thunderstorms on Thursday. Storms
are not expected to be severe.

.Fire Weather...
Elevated fire weather conditions are expected across western
Oklahoma and western sections of north Texas on Monday afternoon.

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

Thompson

In the hours before

Local storm report, Oct 20, 11:05 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1105 PM CDT SUN OCT 20 2019

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

1001 PM     TSTM WND DMG     5 S ASHER               34.92N 96.92W
10/20/2019                   PONTOTOC           OK   TRAINED SPOTTER

            SHEET METAL AND WOODEN DEBRIS ON THE GROUND. TIME OF
            DAMAGE ESTIMATED BY RADAR.

&&

PW

Local storm report, Oct 20, 11:08 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1108 PM CDT SUN OCT 20 2019

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

1040 PM     TSTM WND GST     3 ESE HOLDENVILLE       35.07N 96.35W
10/20/2019  M0 MPH           HUGHES             OK   MESONET

&&

PW

Local storm report, Oct 20, 11:10 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NORMAN OK
1110 PM CDT SUN OCT 20 2019

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

1040 PM     TSTM WND GST     3 ESE HOLDENVILLE       35.07N 96.35W
10/20/2019  M69.00 MPH       HUGHES             OK   MESONET

            CORRECTS PREVIOUS REPORT.

&&

PW

Local storm report, Oct 20, 11:14 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1114 PM CDT SUN OCT 20 2019

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

1105 PM     TSTM WND GST     5 NNW LEBANON           34.05N 96.95W
10/20/2019  M61 MPH          MARSHALL           OK   MESONET

&&

RBARNES

Local storm report, Oct 20, 11:20 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1120 PM CDT SUN OCT 20 2019

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

1120 PM     NON-TSTM WND GST ADA                     34.77N 96.68W
10/20/2019  E65 MPH          PONTOTOC           OK   STORM CHASER

            POWER FLASHES ALSO REPORTED.

&&

RBARNES

Local storm report, Oct 20, 11:38 PM CDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 20, 7:10 PM CDT	Special Weather Statement	OUN	Oklahoma	35 min
Oct 20, 7:12 PM CDT	Special Weather Statement	OUN	Stephens	33 min
Oct 20, 7:13 PM CDT	Special Weather Statement	OUN	Jefferson	32 min
Oct 20, 7:37 PM CDT	Special Weather Statement	OUN	Logan	23 min
Oct 20, 7:38 PM CDT	Special Weather Statement	OUN	Garvin	37 min
Oct 20, 7:41 PM CDT	Special Weather Statement	OUN	Canadian	34 min
Oct 20, 7:46 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Payne	44 min
Oct 20, 7:47 PM CDT	Special Weather Statement	OUN	Grady	28 min
Oct 20, 7:52 PM CDT	Special Weather Statement	OUN	Grant	38 min
Oct 20, 8:00 PM CDT	Special Weather Statement	OUN	Payne	30 min
Oct 20, 8:03 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	42 min
Oct 20, 8:09 PM CDT	Severe Thunderstorm Warning	OUN	Payne	22 min
Oct 20, 8:11 PM CDT	Special Weather Statement	OUN	Garvin	34 min
Oct 20, 8:13 PM CDT	Special Weather Statement	OUN	Cleveland, McClain	32 min
Oct 20, 8:17 PM CDT	Special Weather Statement	OUN	McClain	28 min
Oct 20, 8:18 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Murray, Pontotoc, Pottawatomie, Seminole	42 min
Oct 20, 8:21 PM CDT	Special Weather Statement	OUN	Stephens	24 min
Oct 20, 8:23 PM CDT	Severe Thunderstorm Warning	OUN	Bryan, Johnston, Marshall	52 min
Oct 20, 8:26 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Garvin, Grady, Stephens	34 min
Oct 20, 8:28 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	31 min
Oct 20, 8:38 PM CDT	Special Weather Statement	OUN	Cleveland, Lincoln	52 min
Oct 20, 8:43 PM CDT	Special Weather Statement	OUN	Logan, Noble, Payne	47 min
Oct 20, 8:44 PM CDT	Severe Thunderstorm Warning	OUN	Kay	20 min
Oct 20, 8:51 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, Grady, McClain, Stephens	39 min
Oct 20, 8:54 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Hughes, Johnston	51 min
Oct 20, 8:55 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie, Seminole	50 min
Oct 20, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie, Seminole	32 min
Oct 20, 9:10 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma, Payne	50 min
Oct 20, 9:13 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie, Seminole	47 min
Oct 20, 9:23 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Murray, Pottawatomie, Stephens	52 min
Oct 20, 9:28 PM CDT	Special Weather Statement	OUN	Noble	32 min
Oct 20, 9:36 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, McClain, Oklahoma, Pottawatomie	39 min
Oct 20, 9:36 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, McClain, Oklahoma, Pottawatomie	39 min
Oct 20, 9:47 PM CDT	Tornado Warning	OUN	Cleveland, McClain, Pottawatomie	28 min
Oct 20, 9:57 PM CDT	Special Weather Statement	OUN	Atoka	33 min
Oct 20, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Hughes, McClain, Murray, Pontotoc, Pottawatomie and 1 more	46 min
Oct 20, 10:01 PM CDT	Tornado Warning	OUN	McClain, Pontotoc, Pottawatomie, Seminole	29 min
Oct 20, 10:17 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma, Pottawatomie, Seminole	28 min
Oct 20, 10:19 PM CDT	Special Weather Statement	OUN	McClain	26 min
Oct 20, 10:19 PM CDT	Tornado Warning	OUN	Hughes, Seminole	26 min
Oct 20, 10:33 PM CDT	Special Weather Statement	OUN	Carter, Murray	42 min
Oct 20, 10:36 PM CDT	Special Weather Statement	OUN	Garvin	24 min
Oct 20, 10:36 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Seminole	39 min
Oct 20, 10:44 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Hughes, Johnston, McClain, Murray and 3 more	46 min
Oct 20, 10:46 PM CDT	Special Weather Statement	OUN	Love	29 min
Oct 20, 10:48 PM CDT	Special Weather Statement	OUN	Okfuskee	27 min
Oct 20, 10:53 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall	52 min
Oct 20, 11:10 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	50 min
Oct 20, 11:13 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Love, Marshall	47 min
Oct 20, 11:16 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc, Seminole	44 min
Oct 20, 11:24 PM CDT	Tornado Warning	OUN	Bryan, Johnston, Marshall	14 min
Oct 21, 12:24 AM CDT	Severe Thunderstorm Warning	OUN	Bryan	21 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.