Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 493, NWS Norman, OK

June 9, 2017Washita County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 9, 2017, 12:03 AM CDT for Washita County, Oklahoma. It was in force for 20 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: Jun 9, 2017, 12:03 AM CDT (05:03 UTC)
Expired: Jun 9, 2017, 12:23 AM CDT
In force: 20 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Washita County, OK

The radar

The Altus AFB radar (KFDR), 103 km from the middle of the area, began a volume at 05:04 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, 5.1 hours before the alert went out and 145 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1991 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 8, 9:35 PM CDT, 2 hours 28 minutes earlier.

Area forecast discussion, Jun 8, 9:35 PM CDT, 2 hours 28 minutes before

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Hazardous weather outlook, Jun 8, 10:29 PM CDT, 1 hour 34 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1029 PM CDT Thu Jun 8 2017

OKZ004>048-050>052-TXZ083>090-091100-
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-
1029 PM CDT Thu Jun 8 2017

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

.DAY ONE...Through Tonight...

.Thunderstorms...
Elevated storms are expected to be scattered across the western
half of Oklahoma and adjacent parts of north Texas overnight. The
severe weather threat with these storms will be low, but some
marginally severe hail will be possible through about 4 am.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

.Thunderstorms...
Scattered non-severe storms will be possible Friday morning
across central and southern Oklahoma, and western north Texas.

Thunderstorm chances return next Tuesday and Wednesday of next
week. Severe storms will be possible.

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, Jun 8, 11:33 PM CDT, 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1133 PM CDT THU JUN 8 2017

OKZ014>016-021>023-035>038-090530-
Kiowa OK-Tillman OK-Roger Mills OK-Washita OK-Dewey OK-Caddo OK-
Beckham OK-Custer OK-Comanche OK-Jackson OK-
1133 PM CDT THU JUN 8 2017

...SIGNIFICANT WEATHER ADVISORY FOR Kiowa...northern Tillman...
southeastern Roger Mills...Washita...southwestern Dewey...
southwestern Caddo...northeastern Beckham...western Custer...Comanche
and northeastern Jackson Counties Until 1230 AM CDT...

AT 1128 PM CDT, an area of scattered strong thunderstorm was located
over southwest Oklahoma, from east of Cheyenne to near Lawton,
moving southeast at 20 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3599 9926 3464 9819 3432 9903 3504 9932
      3504 9935 3578 9968
TIME...MOT...LOC 0428Z 333DEG 18KT 3528 9897

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 11:33 PM CDT	Special Weather Statement	OUN	Comanche, Custer, Kiowa, Tillman, Washita	57 min
Jun 9, 12:27 AM CDT	Special Weather Statement	OUN	Comanche, Custer, Kiowa, Washita	63 min
Jun 9, 12:44 AM CDT	Areal Flood Advisory	OUN	Custer, Washita	3 hr
Jun 9, 1:14 AM CDT	Flash Flood Warning	OUN	Custer, Washita	3 hr
Jun 9, 1:19 AM CDT	Areal Flood Advisory	OUN	Comanche	116 min
Jun 9, 1:29 AM CDT	Special Weather Statement	OUN	Comanche, Cotton, Kiowa	61 min
Jun 9, 1:49 AM CDT	Severe Thunderstorm Warning	OUN	Kiowa	41 min
Jun 9, 2:05 AM CDT	Areal Flood Advisory	OUN	Comanche, Kiowa	3 hr
Jun 9, 2:39 AM CDT	Special Weather Statement	OUN	Greer	36 min
Jun 9, 3:08 AM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Tillman	52 min
Jun 9, 3:14 AM CDT	Special Weather Statement	OUN	Jackson	31 min
Jun 9, 3:37 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	53 min
Jun 9, 3:50 AM CDT	Areal Flood Advisory	OUN	Cotton, Tillman	3 hr
Jun 9, 4:00 AM CDT	Flash Flood Warning	OUN	Cotton, Tillman	3 hr
Jun 9, 4:04 AM CDT	Special Weather Statement	OUN	Tillman	26 min
Jun 9, 4:23 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	52 min
Jun 9, 2:14 AM CDT	Special Weather Statement	OUN	Wichita	31 min
Jun 9, 4:05 AM CDT	Special Weather Statement	OUN	Wichita	25 min
Jun 9, 4:33 AM CDT	Areal Flood Advisory	OUN	Archer, Wichita	3 hr
Jun 9, 4:58 AM CDT	Flash Flood Warning	OUN	Wichita	3 hr
Jun 9, 5:15 AM CDT	Special Weather Statement	OUN	Wilbarger	30 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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.