Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 739, NWS Norman, OK

November 24, 20204 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Nov 24, 2020, 7:39 PM CST for 4 counties in Oklahoma. 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: Nov 24, 2020, 7:39 PM CST (01:39 UTC)
Expired: Nov 24, 2020, 8:30 PM CST
In force: 51 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atoka County, OK, Coal County, OK, Hughes County, OK, Pontotoc County, OK

The radar

The Norman radar (KTLX), 113 km from the middle of the area, began a volume at 01:43 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, 1.7 hours before the alert went out and 115 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: 589 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 579 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 334 m²/s²
0-3 km storm-relative helicity: 335 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.0

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 Nov 24, 5:30 PM CST, 2 hours 9 minutes earlier.

Area forecast discussion, Nov 24, 5:30 PM CST, 2 hours 9 minutes before

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Hazardous weather outlook, Nov 24, 5:45 PM CST, 1 hour 54 minutes before

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In the hours before

Special weather statement, Nov 24, 5:02 PM CST, 2 hours 37 minutes before

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Special weather statement, Nov 24, 5:13 PM CST, 2 hours 26 minutes before

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Special weather statement, Nov 24, 5:18 PM CST, 2 hours 21 minutes before

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Special weather statement, Nov 24, 5:46 PM CST, 1 hour 53 minutes before

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Special weather statement, Nov 24, 5:54 PM CST, 1 hour 45 minutes before

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Special weather statement, Nov 24, 5:57 PM CST, 1 hour 42 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
Nov 24, 6:00 PM CST	Special Weather Statement	OUN	Noble	30 min
Nov 24, 6:24 PM CST	Special Weather Statement	OUN	Pontotoc	36 min
Nov 24, 6:27 PM CST	Special Weather Statement	OUN	Logan, Payne	33 min
Nov 24, 6:29 PM CST	Special Weather Statement	OUN	Carter	31 min
Nov 24, 6:32 PM CST	Special Weather Statement	OUN	Lincoln, Oklahoma	28 min
Nov 24, 6:45 PM CST	Special Weather Statement	OUN	Oklahoma	15 min
Nov 24, 7:00 PM CST	Special Weather Statement	OUN	Lincoln	30 min
Nov 24, 7:01 PM CST	Special Weather Statement	OUN	Pottawatomie, Seminole	29 min
Nov 24, 7:02 PM CST	Special Weather Statement	OUN	Hughes	28 min
Nov 24, 7:20 PM CST	Special Weather Statement	OUN	Johnston, Love, Marshall	25 min
Nov 24, 7:25 PM CST	Special Weather Statement	OUN	Seminole	35 min
Nov 24, 7:53 PM CST	Special Weather Statement	OUN	Atoka, Marshall	37 min
Nov 24, 8:26 PM CST	Special Weather Statement	OUN	Atoka	34 min
Nov 24, 8:28 PM CST	Severe Thunderstorm Warning	OUN	Bryan	18 min
Nov 24, 8:46 PM CST	Special Weather Statement	OUN	Bryan	29 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.