Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 581, NWS Norman, OK

October 6, 20187 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Oct 6, 2018, 8:58 PM CDT for 7 counties in Oklahoma. It was in force for 47 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 6, 2018, 8:58 PM CDT (01:58 UTC)
Expired: Oct 6, 2018, 9:45 PM CDT
In force: 47 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, Coal County, OK, Johnston County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK

The radar

The Norman radar (KTLX), 128 km from the middle of the area, began a volume at 01:59 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, 2.0 hours before the alert went out and 124 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: 804 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 6, 6:49 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Oct 6, 6:49 PM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, Oct 6, 7:44 PM CDT, 1 hour 14 minutes before

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In the hours before

Special weather statement, Oct 6, 7:03 PM CDT, 1 hour 55 minutes before

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Special weather statement, Oct 6, 7:12 PM CDT, 1 hour 46 minutes before

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Local storm report, Oct 6, 7:15 PM CDT, 1 hour 43 minutes before

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Special weather statement, Oct 6, 7:15 PM CDT, 1 hour 43 minutes before

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Special weather statement, Oct 6, 7:32 PM CDT, 1 hour 26 minutes before

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Special weather statement, Oct 6, 8:40 PM CDT, 18 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 6, 7:12 PM CDT	Special Weather Statement	OUN	Carter	33 min
Oct 6, 7:15 PM CDT	Special Weather Statement	OUN	Carter	30 min
Oct 6, 7:29 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Love, Murray	46 min
Oct 6, 7:44 PM CDT	Areal Flood Advisory	OUN	Carter	2 hr
Oct 6, 8:06 PM CDT	River Flood Warning	OUN	Cotton	4 days
Oct 6, 8:08 PM CDT	River Flood Warning	OUN	Jackson, Kiowa, Tillman	5 days
Oct 6, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall, Murray, Pontotoc	48 min
Oct 6, 8:40 PM CDT	Special Weather Statement	OUN	Love	35 min
Oct 6, 10:01 PM CDT	Areal Flood Advisory	OUN	Bryan, Carter, Coal, Johnston, Love, Marshall and 1 more	119 min
Oct 7, 12:12 AM CDT	Areal Flood Advisory	OUN	Carter, Jefferson, Love	3 hr
Oct 7, 1:00 AM CDT	Areal Flood Advisory	OUN	Carter, Johnston, Love, Marshall, Murray	3 hr
Oct 7, 4:15 AM CDT	Areal Flood Advisory	OUN	Jefferson, Stephens	3 hr
Oct 7, 4:33 AM CDT	Flash Flood Warning	OUN	Carter, Jefferson, Johnston, Love, Marshall, Murray	4 hr
Oct 7, 7:49 AM CDT	Flash Flood Warning	OUN	Cotton	3 hr
Oct 7, 7:56 AM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Jefferson, Stephens	3 hr
Oct 7, 9:00 AM CDT	River Flood Warning	OUN	Bryan	45 hr
Oct 7, 9:47 AM CDT	River Flood Warning	OUN	Cotton, Jefferson, Tillman	6 days
Oct 7, 9:47 AM CDT	River Flood Warning	OUN	Jefferson, Love	4 days
Oct 7, 9:48 AM CDT	River Flood Warning	OUN	Love	8 days
Oct 7, 9:49 AM CDT	River Flood Warning	OUN	Comanche, Cotton	47 hr
Oct 7, 11:07 AM CDT	Areal Flood Advisory	OUN	Greer, Harmon, Jackson	3 hr
Oct 7, 12:45 PM CDT	Areal Flood Advisory	OUN	Beckham, Greer, Jackson, Kiowa, Washita	3 hr
Oct 7, 3:03 PM CDT	Special Weather Statement	OUN	Canadian	27 min
Oct 7, 3:14 PM CDT	Special Weather Statement	OUN	Carter	31 min
Oct 7, 3:17 PM CDT	Special Weather Statement	OUN	Jackson	28 min
Oct 7, 3:33 PM CDT	Special Weather Statement	OUN	Canadian	27 min
Oct 7, 3:34 PM CDT	Special Weather Statement	OUN	Kiowa	26 min
Oct 7, 3:47 PM CDT	River Flood Warning	OUN	Major, Woods, Woodward	4 days
Oct 7, 3:48 PM CDT	River Flood Warning	OUN	Kingfisher, Logan	5 days
Oct 7, 3:49 PM CDT	River Flood Warning	OUN	Dewey, Major, Woodward	5 days
Oct 7, 3:52 PM CDT	Areal Flood Advisory	OUN	Beckham, Greer, Jackson, Kiowa, Tillman, Washita	3 hr
Oct 7, 4:06 PM CDT	Severe Thunderstorm Warning	OUN	Carter	39 min
Oct 7, 4:10 PM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Canadian, Kingfisher, Washita	3 hr
Oct 7, 4:21 PM CDT	Special Weather Statement	OUN	Coal	24 min
Oct 7, 4:27 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Kiowa	48 min
Oct 7, 4:33 PM CDT	Special Weather Statement	OUN	Murray	27 min
Oct 7, 4:43 PM CDT	Flash Flood Warning	OUN	Greer, Jackson, Kiowa	3 hr
Oct 7, 4:46 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	44 min
Oct 7, 4:52 PM CDT	Special Weather Statement	OUN	Bryan	23 min
Oct 7, 5:06 PM CDT	Tornado Warning	OUN	Carter, Garvin, Murray	39 min
Oct 7, 5:15 PM CDT	Areal Flood Advisory	OUN	Carter, Garvin, Murray	2 hr
Oct 7, 5:20 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	40 min
Oct 7, 5:35 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	40 min
Oct 7, 5:50 PM CDT	Special Weather Statement	OUN	Logan	25 min
Oct 7, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	36 min
Oct 7, 6:05 PM CDT	Special Weather Statement	OUN	Comanche	25 min
Oct 7, 6:12 PM CDT	Flash Flood Warning	OUN	Caddo, Kiowa, Washita	93 min
Oct 7, 6:12 PM CDT	Tornado Warning	OUN	Noble	48 min
Oct 7, 6:23 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	52 min
Oct 7, 6:25 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	50 min
Oct 7, 6:32 PM CDT	Special Weather Statement	OUN	Hughes	28 min
Oct 7, 6:41 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Kiowa	64 min
Oct 7, 6:43 PM CDT	Areal Flood Advisory	OUN	Greer, Jackson, Kiowa	62 min
Oct 7, 6:53 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	22 min
Oct 6, 7:03 PM CDT	Special Weather Statement	OUN	Clay	12 min
Oct 6, 7:32 PM CDT	Special Weather Statement	OUN	Clay	28 min
Oct 6, 8:04 PM CDT	River Flood Warning	OUN	Wichita, Wilbarger	4 days
Oct 7, 1:39 AM CDT	Areal Flood Advisory	OUN	Clay	3 hr
Oct 7, 4:09 AM CDT	Areal Flood Advisory	OUN	Baylor, Knox	3 hr
Oct 7, 5:41 AM CDT	Flash Flood Warning	OUN	Baylor, Knox	3 hr
Oct 7, 5:53 AM CDT	Areal Flood Advisory	OUN	Archer, Wichita	3 hr
Oct 7, 9:48 AM CDT	River Flood Warning	OUN	Wilbarger	70 hr
Oct 7, 10:29 AM CDT	River Flood Warning	OUN	Clay, Wichita	46 hr
Oct 7, 2:28 PM CDT	River Flood Warning	OUN	Baylor, Knox	18 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018 Every severe thunderstorm warning in 2018

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.