Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 516, NWS Norman, OK

June 15, 2017Alfalfa County, Woods County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 15, 2017, 6:56 PM CDT for Alfalfa County, Woods County, Oklahoma. It was in force for 49 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 15, 2017, 6:56 PM CDT (23:56 UTC)
Expired: Jun 15, 2017, 7:45 PM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 70.0 mph

Counties Alfalfa County, OK, Woods County, OK

The radar

The Vance AFB radar (KVNX), 42 km from the middle of the area, began a volume at 23:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 15, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 11.9 hours before the alert went out and 162 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: 3017 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

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 15, 6:00 PM CDT, 56 minutes earlier.

Area forecast discussion, Jun 15, 6:00 PM CDT, 56 minutes before

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Hazardous weather outlook, Jun 15, 5:49 PM CDT, 1 hour 7 minutes before

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In the hours before

Special weather statement, Jun 15, 5:56 PM CDT, 1 hour before

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Local storm report, Jun 15, 6:19 PM CDT, 37 minutes before

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Local storm report, Jun 15, 6:30 PM CDT, 26 minutes before

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Local storm report, Jun 15, 6:45 PM CDT, 11 minutes before

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Local storm report, Jun 15, 6:48 PM CDT, 8 minutes before

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Local storm report, Jun 15, 6:49 PM CDT, 7 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 14, 7:53 PM CDT	Special Weather Statement	OUN	Custer	37 min
Jun 14, 8:29 PM CDT	Special Weather Statement	OUN	Custer	31 min
Jun 14, 8:34 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Washita	27 min
Jun 14, 9:25 PM CDT	Special Weather Statement	OUN	Major	35 min
Jun 15, 8:38 AM CDT	Special Weather Statement	OUN	Lincoln	22 min
Jun 15, 8:41 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln	49 min
Jun 15, 9:38 AM CDT	Special Weather Statement	OUN	Lincoln	37 min
Jun 15, 9:41 AM CDT	Special Weather Statement	OUN	Okfuskee	34 min
Jun 15, 9:59 AM CDT	Special Weather Statement	OUN	Lincoln	31 min
Jun 15, 10:02 AM CDT	Severe Thunderstorm Warning	OUN	Hughes, Seminole	58 min
Jun 15, 10:25 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln	50 min
Jun 15, 10:44 AM CDT	Severe Thunderstorm Warning	OUN	Hughes	61 min
Jun 15, 11:10 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln	50 min
Jun 15, 11:15 AM CDT	Areal Flood Advisory	OUN	Lincoln	3 hr
Jun 15, 11:43 AM CDT	Special Weather Statement	OUN	Seminole	32 min
Jun 15, 12:13 PM CDT	Special Weather Statement	OUN	Lincoln	32 min
Jun 15, 12:21 PM CDT	Flash Flood Warning	OUN	Lincoln	4 hr
Jun 15, 12:23 PM CDT	Special Weather Statement	OUN	Seminole	37 min
Jun 15, 4:44 PM CDT	Special Weather Statement	OUN	Ellis	46 min
Jun 15, 5:03 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Woodward	42 min
Jun 15, 5:37 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woodward	38 min
Jun 15, 6:08 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	52 min
Jun 15, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	51 min
Jun 15, 6:29 PM CDT	Areal Flood Advisory	OUN	Ellis	3 hr
Jun 15, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Woodward	32 min
Jun 15, 5:56 PM CDT	Special Weather Statement	OUN	Hardeman	34 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning in 2017

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.