Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 326, NWS Norman, OK

June 11, 2018Alfalfa County, Major County, Woods County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 11, 2018, 7:41 PM CDT for Alfalfa County, Major County, Woods County, Oklahoma. It was in force for 22 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 11, 2018, 7:41 PM CDT (00:41 UTC)
Expired: Jun 11, 2018, 8:03 PM CDT
In force: 22 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alfalfa County, OK, Major County, OK, Woods County, OK

The radar

The Vance AFB radar (KVNX), 43 km from the middle of the area, began a volume at 00:43 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

Dodge City, (KDDC), launched 00:00Z, 0.7 hours before the alert went out and 175 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: 882 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 2229 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 20 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 Jun 11, 6:24 PM CDT, 1 hour 17 minutes earlier.

Area forecast discussion, Jun 11, 6:24 PM CDT, 1 hour 17 minutes before

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Hazardous weather outlook, Jun 11, 12:51 PM CDT, 6 hours 50 minutes before

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In the hours before

Special weather statement, Jun 11, 7:36 PM CDT, 5 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 11, 7:36 PM CDT	Special Weather Statement	OUN	Major	24 min
Jun 12, 6:16 AM CDT	Severe Thunderstorm Warning	OUN	Payne	59 min
Jun 12, 7:02 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	43 min
Jun 12, 7:32 AM CDT	Special Weather Statement	OUN	Lincoln	28 min
Jun 12, 8:01 AM CDT	Special Weather Statement	OUN	Lincoln	29 min
Jun 12, 8:21 AM CDT	Special Weather Statement	OUN	Hughes, Seminole	39 min
Jun 12, 8:33 AM CDT	Special Weather Statement	OUN	Lincoln	27 min
Jun 12, 8:39 AM CDT	Special Weather Statement	OUN	Payne	36 min
Jun 12, 8:50 AM CDT	Areal Flood Advisory	OUN	Lincoln, Payne	3 hr
Jun 12, 9:15 AM CDT	Special Weather Statement	OUN	Payne	30 min
Jun 12, 9:16 AM CDT	Special Weather Statement	OUN	Hughes	29 min
Jun 12, 9:38 AM CDT	Flash Flood Warning	OUN	Lincoln, Logan, Payne	105 min
Jun 12, 9:43 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan	32 min
Jun 12, 9:56 AM CDT	Special Weather Statement	OUN	Hughes	49 min
Jun 12, 9:57 AM CDT	Areal Flood Advisory	OUN	Hughes	3 hr
Jun 12, 10:08 AM CDT	Special Weather Statement	OUN	Oklahoma	37 min
Jun 12, 10:19 AM CDT	Areal Flood Advisory	OUN	Oklahoma	65 min
Jun 12, 10:26 AM CDT	Special Weather Statement	OUN	Oklahoma	34 min
Jun 12, 10:41 AM CDT	Areal Flood Advisory	OUN	Cleveland, Oklahoma	64 min
Jun 12, 10:55 AM CDT	Special Weather Statement	OUN	Canadian	50 min
Jun 12, 11:01 AM CDT	Special Weather Statement	OUN	Pottawatomie	44 min
Jun 12, 11:35 AM CDT	Special Weather Statement	OUN	Cleveland	25 min
Jun 12, 11:59 AM CDT	Special Weather Statement	OUN	Pontotoc	46 min
Jun 12, 12:01 PM CDT	Special Weather Statement	OUN	Comanche	29 min
Jun 12, 12:06 PM CDT	Special Weather Statement	OUN	Cleveland	24 min
Jun 12, 12:07 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie	53 min
Jun 12, 12:26 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Pontotoc, Pottawatomie	34 min
Jun 12, 12:39 PM CDT	Special Weather Statement	OUN	McClain	51 min
Jun 12, 4:50 PM CDT	Special Weather Statement	OUN	Harper	25 min
Jun 12, 5:01 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	44 min
Jun 12, 5:43 PM CDT	Severe Thunderstorm Warning	OUN	Harper	62 min
Jun 12, 5:52 PM CDT	Areal Flood Advisory	OUN	Harper, Woods	3 hr
Jun 12, 6:10 PM CDT	Special Weather Statement	OUN	Harper	35 min
Jun 12, 6:29 PM CDT	Severe Thunderstorm Warning	OUN	Harper	61 min
Jun 12, 6:33 PM CDT	Areal Flood Advisory	OUN	Harper	3 hr
Jun 12, 3:11 PM CDT	Special Weather Statement	OUN	Knox	34 min

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.