Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 565, NWS Norman, OK

July 13, 2020Ellis County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 13, 2020, 2:16 AM CDT for Ellis County, Woodward County, Oklahoma. It was in force for 44 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 13, 2020, 2:16 AM CDT (07:16 UTC)
Expired: Jul 13, 2020, 3:00 AM CDT
In force: 44 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.88 in
Wind: 70.0 mph

Counties Ellis County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 132 km from the middle of the area, began a volume at 07:19 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

Dodge City, (KDDC), launched 00:00Z, 7.3 hours before the alert went out and 165 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: 1825 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1984 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

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 12, 4:30 PM CDT, 9 hours 46 minutes earlier.

Area forecast discussion, Jul 12, 4:30 PM CDT, 9 hours 46 minutes before

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Hazardous weather outlook, Jul 12, 1:11 PM CDT, 13 hours 5 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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 13, 1:15 AM CDT	Special Weather Statement	OUN	Harper	30 min
Jul 13, 1:34 AM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	26 min
Jul 13, 1:56 AM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	49 min
Jul 13, 2:11 AM CDT	Special Weather Statement	OUN	Ellis	19 min
Jul 13, 2:28 AM CDT	Special Weather Statement	OUN	Woodward	32 min
Jul 13, 2:35 AM CDT	Special Weather Statement	OUN	Alfalfa	25 min
Jul 13, 2:56 AM CDT	Severe Thunderstorm Warning	OUN	Ellis, Woodward	49 min
Jul 13, 3:03 AM CDT	Special Weather Statement	OUN	Woods	42 min
Jul 13, 3:04 AM CDT	Special Weather Statement	OUN	Grant	41 min
Jul 13, 3:29 AM CDT	Special Weather Statement	OUN	Dewey	31 min
Jul 13, 3:33 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Woodward	42 min
Jul 13, 3:44 AM CDT	Special Weather Statement	OUN	Dewey	31 min
Jul 13, 4:14 AM CDT	Special Weather Statement	OUN	Dewey	46 min
Jul 13, 4:31 AM CDT	Special Weather Statement	OUN	Kingfisher	29 min
Jul 13, 4:34 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	41 min
Jul 13, 4:44 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	46 min
Jul 13, 5:13 AM CDT	Special Weather Statement	OUN	Lincoln	32 min
Jul 13, 5:15 AM CDT	Special Weather Statement	OUN	Canadian, Logan	30 min
Jul 13, 5:43 AM CDT	Special Weather Statement	OUN	Canadian, Lincoln, Logan, Oklahoma	32 min
Jul 13, 6:15 AM CDT	Special Weather Statement	OUN	Lincoln, Pottawatomie, Seminole	60 min
Jul 13, 7:16 AM CDT	Special Weather Statement	OUN	Hughes	29 min
Jul 13, 2:17 PM CDT	Excessive Heat Warning	OUN	Bryan, Carter, Jefferson, Love, Marshall, Stephens	7 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; radar from the NEXRAD Level II archive.