Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 505, NWS Norman, OK

July 10, 2020Carter County, Garvin County, Murray County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 10, 2020, 12:20 PM CDT for Carter County, Garvin County, Murray County, Oklahoma. It was in force for 40 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: Jul 10, 2020, 12:20 PM CDT (17:20 UTC)
Expired: Jul 10, 2020, 1:00 PM CDT
In force: 40 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carter County, OK, Garvin County, OK, Murray County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 5.3 hours before the alert went out and 84 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: 901 J/kg
Mixed-layer CIN: -265 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 105 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 Jul 10, 12:00 PM CDT, 20 minutes earlier.

Area forecast discussion, Jul 10, 12:00 PM CDT, 20 minutes before

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Hazardous weather outlook, Jul 10, 11:04 AM CDT, 1 hour 16 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1104 AM CDT Fri Jul 10 2020

OKZ004>048-050>052-TXZ083>090-111615-
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-
1104 AM CDT Fri Jul 10 2020

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

.DAY ONE...Through Tonight...

.Thunderstorms and Heavy Rainfall...
Thunderstorms with strong to severe wind gusts across central
Oklahoma will continue to move southward into southern Oklahoma
through early afternoon. Overall intensity should decrease but the
threat of strong winds will persist. Heavy rainfall could cause
localized flooding, especially in urban areas.

.Heat...
Heat index values of 100 to 105 are possible in far southern
Oklahoma and portions of north Texas today.

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

.Thunderstorms...
Low thunderstorm chances return Saturday night north of Interstate
40 and east of U.S. 81. Strong to severe thunderstorms capable of
damaging wind gusts up to 60 mph and quarter size hail will be
possible Saturday night in north central Oklahoma.

.Heat...
A heat advisory is in effect throughout much of central and western
Oklahoma, apart from the northwest.

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, Jul 10, 11:41 AM CDT, 39 minutes before

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Local storm report, Jul 10, 11:53 AM CDT, 27 minutes before

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Local storm report, Jul 10, 11:54 AM CDT, 26 minutes before

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Local storm report, Jul 10, 11:56 AM CDT, 24 minutes before

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Local storm report, Jul 10, 12:03 PM CDT, 17 minutes before

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Local storm report, Jul 10, 12:10 PM CDT, 10 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
Jul 9, 10:10 PM CDT	Special Weather Statement	OUN	Grant	35 min
Jul 9, 10:54 PM CDT	Special Weather Statement	OUN	Grant	36 min
Jul 9, 10:56 PM CDT	Special Weather Statement	OUN	Noble	34 min
Jul 9, 11:16 PM CDT	Special Weather Statement	OUN	Grant	29 min
Jul 10, 6:32 AM CDT	Special Weather Statement	OUN	Grant	28 min
Jul 10, 6:39 AM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	51 min
Jul 10, 7:08 AM CDT	Special Weather Statement	OUN	Garfield, Grant, Kay, Noble	52 min
Jul 10, 7:13 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	47 min
Jul 10, 7:45 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	45 min
Jul 10, 7:54 AM CDT	Special Weather Statement	OUN	Garfield	21 min
Jul 10, 8:00 AM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	30 min
Jul 10, 8:02 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Major	43 min
Jul 10, 8:11 AM CDT	Special Weather Statement	OUN	Alfalfa, Grant	34 min
Jul 10, 8:29 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble, Payne	61 min
Jul 10, 8:34 AM CDT	Areal Flood Advisory	OUN	Grant	3 hr
Jul 10, 8:41 AM CDT	Special Weather Statement	OUN	Alfalfa, Major, Woods	49 min
Jul 10, 8:43 AM CDT	Special Weather Statement	OUN	Canadian	32 min
Jul 10, 8:46 AM CDT	Special Weather Statement	OUN	Kingfisher	29 min
Jul 10, 8:50 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	25 min
Jul 10, 8:55 AM CDT	Areal Flood Advisory	OUN	Garfield	3 hr
Jul 10, 9:05 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	40 min
Jul 10, 9:11 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Kingfisher, Major	49 min
Jul 10, 9:24 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Garfield, Kingfisher	66 min
Jul 10, 9:29 AM CDT	Areal Flood Advisory	OUN	Kay	2 hr
Jul 10, 9:39 AM CDT	Special Weather Statement	OUN	Oklahoma	36 min
Jul 10, 9:53 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Logan, Oklahoma	52 min
Jul 10, 10:09 AM CDT	Areal Flood Advisory	OUN	Canadian, Oklahoma	3 hr
Jul 10, 10:21 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	54 min
Jul 10, 10:38 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma	67 min
Jul 10, 10:45 AM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	45 min
Jul 10, 11:12 AM CDT	Flash Flood Warning	OUN	Canadian, Oklahoma	3 hr
Jul 10, 11:12 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Garvin, Grady, McClain, Stephens	48 min
Jul 10, 11:13 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma, Pottawatomie	47 min
Jul 10, 11:22 AM CDT	Areal Flood Advisory	OUN	Cleveland, McClain	113 min
Jul 10, 11:30 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pontotoc, Pottawatomie, Seminole	45 min
Jul 10, 11:59 AM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Murray	46 min
Jul 10, 12:59 PM CDT	Special Weather Statement	OUN	Carter, Murray	46 min
Jul 10, 1:14 PM CDT	Heat Advisory	OUN	Alfalfa, Atoka, Beckham, Bryan, Caddo, Canadian and 37 more	3 days
Jul 10, 1:34 PM CDT	Special Weather Statement	OUN	Johnston, Love, Marshall	41 min
Jul 10, 1:40 PM CDT	Special Weather Statement	OUN	Hughes	50 min
Jul 10, 2:50 PM CDT	Special Weather Statement	OUN	Bryan	25 min
Jul 10, 3:00 PM CDT	Heat Advisory	OUN	Atoka, Bryan, Love, Marshall	22 hr

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.