Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 823, NWS Norman, OK

August 17, 2017Cotton County, Tillman County, Oklahoma; Clay County, Wichita County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Aug 17, 2017, 1:39 AM CDT for Cotton County, Tillman County, Oklahoma; Clay County, Wichita County, Texas. It was in force for 51 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: Aug 17, 2017, 1:39 AM CDT (06:39 UTC)
Expired: Aug 17, 2017, 2:30 AM CDT
In force: 51 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cotton County, OK, Tillman County, OK, Clay County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 48 km from the middle of the area, began a volume at 06:43 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.7 hours before the alert went out and 162 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: 2168 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 9.2

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 Aug 17, 12:44 AM CDT, 55 minutes earlier.

Area forecast discussion, Aug 17, 12:44 AM CDT, 55 minutes before

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Hazardous weather outlook, Aug 16, 11:43 PM CDT, 1 hour 56 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1143 PM CDT Wed Aug 16 2017

OKZ004>048-050>052-TXZ083>090-180445-
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-
1143 PM CDT Wed Aug 16 2017

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

.DAY ONE...Rest of Tonight...

.Thunderstorms...
Marginally severe storms will be possible across southern Oklahoma
and western north Texas. Wind gusts of 50 to 60 mph and torrential
rainfall will be the primarily concerns. Isolated storms may
produce wind gusts 60 to 70 mph.

.Heavy Rainfall/Flooding...
A very moist environment will support locally heavy rainfall.
Additional heavy rainfall on saturated ground could lead to
flooding through tonight, primarily south and east of Oklahoma
City.

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

.Thunderstorms...
Thunderstorms will be possible each day through Tuesday. Strong
to severe storms will be possible across western Oklahoma and
portions of western north Texas Thursday evening. Large hail and
damaging wind gusts will be the main concerns along with
torrential rainfall.

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, Aug 17, 12:40 AM CDT, 59 minutes before

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Local storm report, Aug 17, 12:55 AM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1255 AM CDT THU AUG 17 2017

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

1240 AM     TSTM WND GST     4 E LAWTON              34.60N 98.35W
08/17/2017  M64 MPH          COMANCHE           OK   AMATEUR RADIO

            SEVERAL SHINGLES BLOWN OFF ROOF ALONG WITH SEVERAL 1 TO 2
            INCH TREE LIMBS DOWN.

&&

SC

Local storm report, Aug 17, 1:10 AM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
110 AM CDT THU AUG 17 2017

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

1230 AM     TSTM WND DMG     LAWTON                  34.60N 98.42W
08/17/2017                   COMANCHE           OK   AMATEUR RADIO

            POWER POLE DOWN.

&&

SC

Special weather statement, Aug 17, 1:14 AM CDT, 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
114 AM CDT THU AUG 17 2017

OKZ037-039-044-045-TXZ085-086-088>090-170700-
Tillman OK-Cotton OK-Stephens OK-Jefferson OK-Clay TX-Wichita TX-
Wilbarger TX-Archer TX-Baylor TX-
114 AM CDT THU AUG 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR southern Tillman...Cotton...
southwestern Stephens...Jefferson...Clay...Wichita...Wilbarger...
northern Archer and northeastern Baylor Counties Until 200 AM CDT...

AT 112 AM CDT, strong thunderstorms were along a line extending from
3 miles south of Grayback to near Petrolia to near Waurika, moving
southeast at 35 MPH.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...
Frequent cloud to ground lightning...

Locations impacted include...
Wichita Falls, Vernon, Burkburnett, Henrietta, Walters, Waurika, Iowa
Park, Electra, Holliday, Grandfield, Temple, Ryan, Petrolia,
Scotland, Byers, Dean, Randlett, Terral, Bellevue and Davidson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3374 9932 3414 9948 3420 9948 3435 9852
      3448 9813 3399 9765 3399 9769 3386 9783
      3385 9787 3389 9798 3360 9798
TIME...MOT...LOC 0612Z 328DEG 29KT 3394 9919 3400 9828 3420 9799

MAHALE

Special weather statement, Aug 17, 1:28 AM CDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
128 AM CDT THU AUG 17 2017

OKZ032-039-041>043-045>048-050>052-170730-
Love OK-Coal OK-Atoka OK-Stephens OK-Carter OK-Pontotoc OK-
Johnston OK-Marshall OK-Hughes OK-Murray OK-Bryan OK-Jefferson OK-
128 AM CDT THU AUG 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR Love...Coal...Atoka...southern
Stephens...Carter...southern Pontotoc...Johnston...Marshall...
southeastern Hughes...Murray...Bryan and northeastern Jefferson
Counties Until 230 AM CDT...

AT 123 AM CDT, strong thunderstorms were along a line extending from
4 miles west of Wardville to near Reagan to 6 miles southwest of
Ringling, moving southeast at 35 MPH.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...
Frequent cloud to ground lightning...

Locations impacted include...
Ardmore, Duncan, Durant, Sulphur, Madill, Atoka, Tishomingo, Davis,
Marietta, Coalgate, Lone Grove, Healdton, Wilson, Comanche, Kingston,
Dickson, Colbert, Ringling, Caddo and Mannsville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3451 9578 3416 9578 3416 9598 3401 9594
      3378 9646 3392 9666 3383 9671 3395 9698
      3396 9698 3372 9714 3392 9721 3383 9746
      3398 9770 3396 9771 3448 9814 3457 9772
      3446 9722 3497 9609 3468 9609 3455 9567
TIME...MOT...LOC 0623Z 327DEG 32KT 3465 9612 3433 9670 3412 9769

MAHALE

Local storm report, Aug 17, 1:38 AM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
138 AM CDT THU AUG 17 2017

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

0130 AM     TSTM WND GST     3 W GRANDFIELD          34.23N 98.74W
08/17/2017  M66 MPH          TILLMAN            OK   MESONET

&&

SC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 7:10 PM CDT	Special Weather Statement	OUN	Garfield	35 min
Aug 16, 7:18 PM CDT	Special Weather Statement	OUN	Blaine	27 min
Aug 16, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kay, Noble	63 min
Aug 16, 7:32 PM CDT	Special Weather Statement	OUN	Custer	28 min
Aug 16, 7:35 PM CDT	Special Weather Statement	OUN	Blaine	25 min
Aug 16, 7:47 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer	58 min
Aug 16, 8:02 PM CDT	Special Weather Statement	OUN	Kingfisher	28 min
Aug 16, 8:11 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	34 min
Aug 16, 8:18 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Noble, Payne	27 min
Aug 16, 8:20 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	40 min
Aug 16, 8:23 PM CDT	Severe Thunderstorm Warning	OUN	Washita	52 min
Aug 16, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Custer, Kingfisher, Logan and 1 more	60 min
Aug 16, 8:46 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	59 min
Aug 16, 8:52 PM CDT	Special Weather Statement	OUN	Greer, Washita	23 min
Aug 16, 9:09 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Greer, Kiowa, Washita	36 min
Aug 16, 9:18 PM CDT	Special Weather Statement	OUN	Oklahoma	27 min
Aug 16, 9:25 PM CDT	Special Weather Statement	OUN	Lincoln	35 min
Aug 16, 9:37 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	38 min
Aug 16, 9:42 PM CDT	Special Weather Statement	OUN	Payne	33 min
Aug 16, 9:44 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady, Greer, Jackson, Kiowa, Washita	61 min
Aug 16, 9:50 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	55 min
Aug 16, 9:56 PM CDT	Special Weather Statement	OUN	Oklahoma	34 min
Aug 16, 9:59 PM CDT	Areal Flood Advisory	OUN	Canadian, Oklahoma	2 hr
Aug 16, 10:00 PM CDT	Areal Flood Advisory	OUN	Caddo, Kiowa, Washita	3 hr
Aug 16, 10:14 PM CDT	Special Weather Statement	OUN	Cleveland, McClain	31 min
Aug 16, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa	47 min
Aug 16, 10:47 PM CDT	Special Weather Statement	OUN	Cleveland, Grady, McClain, Pottawatomie	28 min
Aug 16, 10:57 PM CDT	Special Weather Statement	OUN	Comanche	33 min
Aug 16, 10:59 PM CDT	Special Weather Statement	OUN	Tillman	31 min
Aug 16, 11:07 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche	25 min
Aug 16, 11:17 PM CDT	Special Weather Statement	OUN	Cotton, Stephens, Tillman	28 min
Aug 16, 11:27 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Garvin, Grady, McClain, Stephens	3 hr
Aug 16, 11:29 PM CDT	Special Weather Statement	OUN	Garvin, McClain, Pottawatomie, Seminole, Stephens	61 min
Aug 16, 11:44 PM CDT	Special Weather Statement	OUN	Cotton	31 min
Aug 17, 12:01 AM CDT	Special Weather Statement	OUN	Comanche	29 min
Aug 17, 12:10 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	24 min
Aug 17, 12:27 AM CDT	Special Weather Statement	OUN	Carter, Coal, Garvin, Hughes, Johnston, Murray and 3 more	63 min
Aug 17, 12:40 AM CDT	Special Weather Statement	OUN	Comanche, Cotton	35 min
Aug 17, 12:47 AM CDT	Areal Flood Advisory	OUN	Carter, Comanche, Cotton, Garvin, Grady, Murray and 1 more	3 hr
Aug 17, 1:14 AM CDT	Special Weather Statement	OUN	Cotton, Jefferson	46 min
Aug 17, 1:21 AM CDT	Severe Thunderstorm Warning	OUN	Cotton	24 min
Aug 17, 1:28 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Carter, Coal, Johnston, Love and 3 more	62 min
Aug 17, 2:27 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Carter, Jefferson, Johnston, Love and 1 more	63 min
Aug 17, 3:43 AM CDT	Areal Flood Advisory	OUN	Bryan, Johnston, Marshall	3 hr
Aug 17, 4:18 AM CDT	Flash Flood Warning	OUN	Bryan, Johnston, Marshall	3 hr
Aug 16, 7:06 PM CDT	Special Weather Statement	OUN	Foard	24 min
Aug 16, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Foard	48 min
Aug 16, 7:35 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	25 min
Aug 16, 7:54 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	51 min
Aug 16, 11:56 PM CDT	Special Weather Statement	OUN	Wilbarger	34 min
Aug 17, 12:23 AM CDT	Special Weather Statement	OUN	Wilbarger	37 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

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.