Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 502, NWS Norman, OK

June 13, 2017Ellis County, Roger Mills County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 13, 2017, 10:00 PM CDT for Ellis County, Roger Mills County, Oklahoma. It was in force for 45 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 13, 2017, 10:00 PM CDT (03:00 UTC)
Expired
Jun 13, 2017, 10:45 PM CDT
In force
45 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Ellis County, OK, Roger Mills County, OK

The radar

The Vance AFB radar (KVNX), 168 km from the middle of the area, began a volume at 02:59 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.

IssuedProductOfficeLasted
Jun 13, 3:38 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.0 hours before the alert went out and 196 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-pSkew-T log-p diagram, Amarillo Airport, TX at 00:00Z on 2017-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2017-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
42 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
4102 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

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 13, 8:43 PM CDT, 1 hour 17 minutes earlier.

Area forecast discussion, Jun 13, 8:43 PM CDT, 1 hour 17 minutes before
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Hazardous weather outlook, Jun 13, 8:13 PM CDT, 1 hour 47 minutes before
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In the hours before

Local storm report, Jun 13, 8:45 PM CDT, 1 hour 15 minutes before
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Special weather statement, Jun 13, 8:48 PM CDT, 1 hour 12 minutes before
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Special weather statement, Jun 13, 8:55 PM CDT, 1 hour 5 minutes before
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Special weather statement, Jun 13, 9:27 PM CDT, 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
927 PM CDT TUE JUN 13 2017

OKZ005-006-011-140315-
Major OK-Alfalfa OK-Woods OK-
927 PM CDT TUE JUN 13 2017

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Major...western
Alfalfa and Woods Counties Until 1015 PM CDT...

AT 924 PM CDT, an area of light showers across parts of Alfalfa,
Woods and Major counties were mixing stronger winds from above the
ground down to the surface. Some gusts to over 50 mph will be
possible over the next hour.

LAT...LON 3700 9832 3650 9823 3648 9891 3660 9896
      3662 9899 3698 9921
TIME...MOT...LOC 0224Z 232DEG 24KT 3673 9876

30
Special weather statement, Jun 13, 9:33 PM CDT, 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
933 PM CDT TUE JUN 13 2017

OKZ009-014-140300-
Roger Mills OK-Ellis OK-
933 PM CDT TUE JUN 13 2017

...SIGNIFICANT WEATHER ADVISORY FOR northern Roger Mills and south
central Ellis Counties Until 1000 PM CDT...

AT 932 PM CDT, a strong thunderstorm was located near Reydon, moving
east at 40 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3587 10000 3602 9972 3573 9951 3558 10000
TIME...MOT...LOC 0232Z 248DEG 33KT 3566 9995

30
Special weather statement, Jun 13, 9:54 PM CDT, 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
954 PM CDT TUE JUN 13 2017

OKZ004-010-140330-
Woodward OK-Harper OK-
954 PM CDT TUE JUN 13 2017

...SIGNIFICANT WEATHER ADVISORY FOR northeastern Woodward and
southeastern Harper Counties Until 1030 PM CDT...

AT 953 PM CDT, a strong thunderstorm was located 9 miles southwest of
Alabaster Caverns State Park, moving northeast at 35 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 40 MPH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3668 9904 3649 9918 3657 9941 3679 9922
TIME...MOT...LOC 0253Z 223DEG 31KT 3659 9927

30

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 7:13 PM CDTSevere Thunderstorm WarningOUNEllis, Woodward47 min
Jun 13, 7:20 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Harmon40 min
Jun 13, 7:24 PM CDTSevere Thunderstorm WarningOUNHarper51 min
Jun 13, 7:53 PM CDTSpecial Weather StatementOUNEllis37 min
Jun 13, 8:44 PM CDTSpecial Weather StatementOUNEllis31 min
Jun 13, 8:48 PM CDTSpecial Weather StatementOUNGreer27 min
Jun 13, 8:55 PM CDTSpecial Weather StatementOUNHarper35 min
Jun 13, 9:27 PM CDTSpecial Weather StatementOUNAlfalfa, Woods48 min
Jun 13, 9:33 PM CDTSpecial Weather StatementOUNRoger Mills27 min
Jun 13, 9:54 PM CDTSpecial Weather StatementOUNWoodward36 min
Jun 13, 10:25 PM CDTSpecial Weather StatementOUNWoods35 min
Jun 13, 10:44 PM CDTSpecial Weather StatementOUNDewey31 min
Jun 13, 11:15 PM CDTSpecial Weather StatementOUNBeckham30 min
Jun 13, 11:27 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills48 min
Jun 13, 11:30 PM CDTSpecial Weather StatementOUNHarper30 min
Jun 14, 12:00 AM CDTSpecial Weather StatementOUNHarper30 min
Jun 14, 12:42 AM CDTSpecial Weather StatementOUNBlaine, Custer48 min
Jun 14, 12:43 AM CDTSpecial Weather StatementOUNWoods47 min
Jun 14, 1:26 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods34 min
Jun 14, 1:28 AM CDTSpecial Weather StatementOUNBlaine, Kingfisher47 min
Jun 14, 1:50 AM CDTSpecial Weather StatementOUNAlfalfa25 min
Jun 14, 1:56 AM CDTSpecial Weather StatementOUNAlfalfa49 min
Jun 14, 2:00 AM CDTSpecial Weather StatementOUNDewey30 min
Jun 14, 2:13 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant47 min
Jun 14, 2:23 AM CDTSpecial Weather StatementOUNGrant52 min
Jun 14, 3:01 AM CDTSpecial Weather StatementOUNGrant29 min
Jun 14, 3:38 AM CDTSpecial Weather StatementOUNGrant52 min
Jun 14, 4:34 AM CDTSpecial Weather StatementOUNPayne41 min
Jun 14, 5:29 AM CDTAreal Flood AdvisoryOUNPayne3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017Every 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.