Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 413, NWS Norman, OK

June 19, 2020Tillman County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 19, 2020, 3:27 PM CDT for Tillman County, Oklahoma. It was in force for 48 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 19, 2020, 3:27 PM CDT (20:27 UTC)
Expired: Jun 19, 2020, 4:15 PM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Tillman County, OK

The radar

The Altus AFB radar (KFDR), 5 km from the middle of the area, began a volume at 20:30 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 12:00Z, 8.5 hours before the alert went out and 168 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: 403 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 1307 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 113 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 19, 3:15 PM CDT, 12 minutes earlier.

Area forecast discussion, Jun 19, 3:15 PM CDT, 12 minutes before

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Hazardous weather outlook, Jun 19, 12:46 PM CDT, 2 hours 41 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1246 PM CDT Fri Jun 19 2020

OKZ004>048-050>052-TXZ083>090-201115-
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-
1246 PM CDT Fri Jun 19 2020

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

.DAY ONE...This afternoon and Tonight...

.Thunderstorms...
There is a slight risk for severe storms across portions of
western Oklahoma and western north Texas.

Location... The slight risk is south and west of a line from
Cheyenne and Clinton, to near Lawton, to Henrietta Texas. There
is a Marginal risk across most of the rest of the area.

Timing... Most likely through midnight.

Impacts...
Wind gusts up to 70 mph.
Hail up to the size of half dollars.
Locally heavy rain and flooding.

Discussion...
Strong to severe storms will be possible this afternoon and
evening, mainly over the southwest quarter of Oklahoma and western
north Texas. Additional storms are expected to develop over west
Texas during the afternoon, then move east into western north
Texas this evening. Showers and storms will remain possible
overnight into early Saturday but the potential for severe storms
will diminish late this evening.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

Storm spotter groups and emergency management personnel across the
risk area should prepare for severe weather operations later this
afternoon and this evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

.Thunderstorms...
Strong to severe storms will be possible again on Saturday,
Sunday, and Monday. The risk for severe weather will diminish
somewhat for the rest of the week. Strong winds and large hail
will be the main threats. There are some uncertainties due to the
possible impact of storms the previous days and nights on the
airmass across the region.

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

In the hours before

Local storm report, Jun 19, 2:19 PM CDT, 1 hour 8 minutes before

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Local storm report, Jun 19, 2:21 PM CDT, 1 hour 6 minutes before

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Special weather statement, Jun 19, 2:57 PM CDT, 30 minutes before

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Special weather statement, Jun 19, 3:01 PM CDT, 26 minutes before

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Special weather statement, Jun 19, 3:11 PM CDT, 16 minutes before

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Special weather statement, Jun 19, 3:12 PM CDT, 15 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
Jun 19, 6:14 AM CDT	Special Weather Statement	OUN	Major	31 min
Jun 19, 8:44 AM CDT	Areal Flood Advisory	OUN	Alfalfa, Blaine, Garfield, Grant, Kingfisher, Major	2 hr
Jun 19, 10:36 AM CDT	Special Weather Statement	OUN	Oklahoma	24 min
Jun 19, 11:21 AM CDT	Areal Flood Advisory	OUN	Canadian, Cleveland, Grady, Oklahoma	114 min
Jun 19, 11:27 AM CDT	Special Weather Statement	OUN	Oklahoma	33 min
Jun 19, 11:46 AM CDT	Areal Flood Advisory	OUN	Noble, Payne	3 hr
Jun 19, 12:34 PM CDT	Areal Flood Advisory	OUN	Caddo, Cleveland, Comanche, Grady, McClain, Oklahoma	116 min
Jun 19, 1:33 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Tillman	117 min
Jun 19, 1:37 PM CDT	Flash Flood Warning	OUN	Caddo, Comanche	3 hr
Jun 19, 1:47 PM CDT	Special Weather Statement	OUN	Comanche	28 min
Jun 19, 2:05 PM CDT	Special Weather Statement	OUN	Cotton	25 min
Jun 19, 2:10 PM CDT	Flash Flood Warning	OUN	Comanche	3 hr
Jun 19, 2:17 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	43 min
Jun 19, 2:41 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Garvin, Grady, McClain, Stephens	3 hr
Jun 19, 2:57 PM CDT	Special Weather Statement	OUN	Stephens	33 min
Jun 19, 3:01 PM CDT	Special Weather Statement	OUN	Kiowa	29 min
Jun 19, 3:04 PM CDT	Areal Flood Advisory	OUN	Comanche, Jackson, Kiowa, Tillman	3 hr
Jun 19, 3:11 PM CDT	Special Weather Statement	OUN	Tillman	49 min
Jun 19, 3:12 PM CDT	Special Weather Statement	OUN	Jackson	63 min
Jun 19, 3:18 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	27 min
Jun 19, 3:21 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	27 min
Jun 19, 3:26 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Tillman	3 hr
Jun 19, 3:36 PM CDT	Special Weather Statement	OUN	Cotton	24 min
Jun 19, 4:07 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	38 min
Jun 19, 4:09 PM CDT	Areal Flood Advisory	OUN	Jackson, Tillman	3 hr
Jun 19, 4:10 PM CDT	Special Weather Statement	OUN	Jackson	35 min
Jun 19, 4:17 PM CDT	Special Weather Statement	OUN	Cotton	28 min
Jun 19, 4:19 PM CDT	Special Weather Statement	OUN	Tillman	26 min
Jun 19, 4:40 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	35 min
Jun 19, 4:43 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	62 min
Jun 19, 4:46 PM CDT	Areal Flood Advisory	OUN	Carter, Garvin, Murray	3 hr
Jun 19, 4:48 PM CDT	Special Weather Statement	OUN	Hughes	42 min
Jun 19, 4:49 PM CDT	Special Weather Statement	OUN	Murray	41 min
Jun 19, 5:20 PM CDT	Special Weather Statement	OUN	Hughes	25 min
Jun 19, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	24 min
Jun 19, 2:51 PM CDT	Severe Thunderstorm Warning	OUN	Wichita, Wilbarger	39 min
Jun 19, 4:52 PM CDT	Special Weather Statement	OUN	Wilbarger	38 min
Jun 19, 5:29 PM CDT	Special Weather Statement	OUN	Clay	46 min
Jun 19, 5:39 PM CDT	Special Weather Statement	OUN	Wilbarger	66 min
Jun 19, 6:02 PM CDT	Special Weather Statement	OUN	Clay	28 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2020 Every severe thunderstorm warning in 2020

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.