Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 515, NWS Norman, OK

June 15, 2017Ellis County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 15, 2017, 6:09 PM CDT for Ellis County, 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: Jun 15, 2017, 6:09 PM CDT (23:09 UTC)
Expired: Jun 15, 2017, 7:00 PM CDT
In force: 51 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 1.75 in
Wind: 60.0 mph

County Ellis County, OK

The radar

The Vance AFB radar (KVNX), 157 km from the middle of the area, began a volume at 23:09 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, 11.2 hours before the alert went out and 173 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, 9 minutes earlier.

Area forecast discussion, Jun 15, 6:00 PM CDT, 9 minutes before

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Hazardous weather outlook, Jun 15, 5:49 PM CDT, 20 minutes before

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In the hours before

Special weather statement, Jun 15, 12:13 PM CDT, 5 hours 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1213 PM CDT THU JUN 15 2017

OKZ026-151745-
Lincoln OK-
1213 PM CDT THU JUN 15 2017

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Lincoln County Until
1245 PM CDT...

AT 1211 PM CDT, a strong thunderstorm was located just north of
Sparks. This storm was nearly stationary.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Flooding in areas of poor drainage...

Locations impacted include...
Chandler, Meeker, Davenport and Sparks.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3547 9688 3564 9696 3575 9678 3563 9662
      3561 9662
TIME...MOT...LOC 1711Z 177DEG 1KT 3564 9683

11

Special weather statement, Jun 15, 12:23 PM CDT, 5 hours 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1223 PM CDT THU JUN 15 2017

OKZ031-151800-
Seminole OK-
1223 PM CDT THU JUN 15 2017

...SIGNIFICANT WEATHER ADVISORY FOR central Seminole County Until 100
PM CDT...

AT 1221 PM CDT, a strong thunderstorm was located near Seminole,
moving southeast at 15 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...

Locations impacted include...
Seminole, Wewoka, Bowlegs and Lima.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3509 9662 3527 9671 3533 9655 3520 9644
      3518 9644
TIME...MOT...LOC 1721Z 325DEG 12KT 3527 9663

11

Special weather statement, Jun 15, 4:44 PM CDT, 1 hour 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
444 PM CDT THU JUN 15 2017

OKZ009-152230-
Ellis OK-
444 PM CDT THU JUN 15 2017

...SIGNIFICANT WEATHER ADVISORY FOR central Ellis County Until
530 PM CDT...

AT 441 PM CDT, a strong thunderstorm was located near Higgins, moving
northeast at 35 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

Locations impacted include...
Shattuck, Arnett, Gage and Harmon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3640 9973 3623 9960 3617 9960 3616 9955
      3601 9944 3599 9981 3600 9982 3601 9985
      3599 9987 3598 9999 3623 10000
TIME...MOT...LOC 2141Z 242DEG 30KT 3608 9999

MBS

Local storm report, Jun 15, 5:13 PM CDT, 56 minutes before

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Local storm report, Jun 15, 5:40 PM CDT, 29 minutes before

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Special weather statement, Jun 15, 5:56 PM CDT, 13 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, 6:29 PM CDT	Areal Flood Advisory	OUN	Ellis	3 hr
Jun 15, 6:56 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	49 min
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.