Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 238, NWS Norman, OK

May 25, 2018Garfield County, Grant County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 25, 2018, 3:32 AM CDT for Garfield County, Grant County, Oklahoma. It was in force for 43 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
May 25, 2018, 3:32 AM CDT (08:32 UTC)
Expired
May 25, 2018, 4:15 AM CDT
In force
43 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Garfield County, OK, Grant County, OK

The radar

The Vance AFB radar (KVNX), 35 km from the middle of the area, began a volume at 08:35 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

Norman, OK (KOUN), launched 00:00Z, 8.5 hours before the alert went out and 156 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, Norman, OK at 00:00Z on 2018-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1038 joules per kilogram.LCLLFCEL10008507005003002001001 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, Norman, OK at 00:00Z on 2018-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.1939Sfc1 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
1038 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
1381 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
36 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 May 24, 11:20 PM CDT, 4 hours 12 minutes earlier.

Area forecast discussion, May 24, 11:20 PM CDT, 4 hours 12 minutes before
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Hazardous weather outlook, May 24, 9:33 PM CDT, 5 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Norman OK
933 PM CDT Thu May 24 2018

OKZ004>048-050>052-TXZ083>090-251300-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
933 PM CDT Thu May 24 2018

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Through Tonight...

.Thunderstorms...
Thunderstorms will be possible overnight, mainly across northern
Oklahoma. A few of the storms may be strong, with heavy rain,
small hail, and gusty winds.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

.Thunderstorms...
Thunderstorms are expected to develop Friday afternoon, primarily
across the northern half of Oklahoma. A few of these storms could
be severe, with the greatest hazard being damaging wind gusts.
Thunderstorms may increase in coverage Friday evening, and move
southward across much of the area through early Saturday morning.

A few thunderstorms could move into western Oklahoma during the
evening hours Sunday, Monday, and Tuesday. Severe thunderstorms
are unlikely during this period.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

Mahale/CmS

In the hours before

Special weather statement, May 25, 12:56 AM CDT, 2 hours 36 minutes before
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Special weather statement, May 25, 1:45 AM CDT, 1 hour 47 minutes before
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Special weather statement, May 25, 2:17 AM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
217 AM CDT FRI MAY 25 2018

OKZ005>007-250800-
Alfalfa OK-Woods OK-Grant OK-
217 AM CDT FRI MAY 25 2018

...SIGNIFICANT WEATHER ADVISORY FOR Alfalfa...eastern Woods and
northwestern Grant Counties Until 300 AM CDT...

AT 214 AM CDT, a strong thunderstorm was located 4 miles northwest of
Amorita, moving southeast at 45 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts over 50 MPH...
Frequent cloud to ground lightning...

Locations impacted include...
Cherokee, Wakita, Jet, Burlington, Manchester, Amorita, Byron,
Ingersoll, Great Salt Plains Lake, Driftwood, Capron and Waldron.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3652 9820 3689 9864 3700 9847 3700 9775
TIME...MOT...LOC 0714Z 305DEG 37KT 3696 9836

03
Special weather statement, May 25, 2:53 AM CDT, 39 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
253 AM CDT FRI MAY 25 2018

OKZ006-007-012-250845-
Garfield OK-Alfalfa OK-Grant OK-
253 AM CDT FRI MAY 25 2018

...SIGNIFICANT WEATHER ADVISORY FOR northern Garfield...southern
Alfalfa and Grant Counties Until 345 AM CDT...

AT 249 AM CDT, strong thunderstorms were along a line extending from
9 miles east of Manchester to 3 miles south of Wakita to near Jet to
3 miles southwest of Lambert, moving east at 35 MPH.

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

LAT...LON 3665 9748 3648 9747 3648 9841 3668 9854
      3672 9834 3687 9804 3700 9797 3700 9746
TIME...MOT...LOC 0749Z 287DEG 30KT 3701 9787 3683 9792 3667 9821 3664
9846

SIX

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 7:15 PM CDTSpecial Weather StatementOUNAlfalfa30 min
May 25, 12:56 AM CDTSpecial Weather StatementOUNWoods49 min
May 25, 1:45 AM CDTSpecial Weather StatementOUNWoods45 min
May 25, 2:17 AM CDTSpecial Weather StatementOUNAlfalfa43 min
May 25, 2:53 AM CDTSpecial Weather StatementOUNGrant52 min
May 25, 4:09 AM CDTSpecial Weather StatementOUNGarfield, Noble51 min
May 25, 4:27 AM CDTSpecial Weather StatementOUNAlfalfa33 min
May 25, 4:43 AM CDTSpecial Weather StatementOUNKingfisher, Logan32 min
May 25, 4:52 AM CDTSpecial Weather StatementOUNWoods23 min
May 25, 5:00 AM CDTSevere Thunderstorm WarningOUNAlfalfa30 min
May 25, 5:18 AM CDTSpecial Weather StatementOUNCanadian, Kingfisher, Lincoln, Logan, Oklahoma, Payne27 min
May 25, 5:21 AM CDTSpecial Weather StatementOUNAlfalfa24 min
May 25, 5:31 AM CDTSevere Thunderstorm WarningOUNAlfalfa44 min
May 25, 6:06 AM CDTAreal Flood AdvisoryOUNAlfalfa, Woods3 hr
May 25, 6:27 AM CDTSpecial Weather StatementOUNGarfield48 min
May 25, 6:47 AM CDTAreal Flood AdvisoryOUNLogan, Oklahoma118 min
May 25, 7:16 AM CDTSpecial Weather StatementOUNCanadian, Kingfisher29 min
May 25, 7:53 AM CDTSpecial Weather StatementOUNGarfield22 min
May 25, 7:56 AM CDTSpecial Weather StatementOUNCleveland34 min
May 25, 8:04 AM CDTAreal Flood AdvisoryOUNCleveland, Oklahoma3 hr
May 25, 8:38 AM CDTSpecial Weather StatementOUNWoods37 min
May 25, 9:09 AM CDTSpecial Weather StatementOUNWoods36 min
May 25, 9:27 AM CDTSpecial Weather StatementOUNStephens33 min
May 25, 9:50 AM CDTSpecial Weather StatementOUNGarfield25 min
May 25, 10:27 AM CDTSpecial Weather StatementOUNJefferson, Love, Marshall33 min
May 25, 10:30 AM CDTSpecial Weather StatementOUNNoble30 min
May 25, 10:54 AM CDTSpecial Weather StatementOUNPayne36 min
May 25, 11:01 AM CDTSpecial Weather StatementOUNBryan, Love, Marshall29 min
May 25, 11:10 AM CDTSpecial Weather StatementOUNPayne35 min
May 25, 11:25 AM CDTSpecial Weather StatementOUNLincoln35 min
May 25, 11:39 AM CDTSpecial Weather StatementOUNLincoln36 min
May 25, 11:55 AM CDTSevere Thunderstorm WarningOUNBryan35 min
May 25, 12:07 PM CDTSpecial Weather StatementOUNOklahoma23 min
May 25, 1:27 PM CDTSpecial Weather StatementOUNGarfield33 min
May 25, 3:06 PM CDTSpecial Weather StatementOUNCleveland24 min
May 25, 4:07 PM CDTSpecial Weather StatementOUNPottawatomie23 min
May 25, 4:52 PM CDTSpecial Weather StatementOUNSeminole38 min
May 25, 5:29 PM CDTSpecial Weather StatementOUNSeminole31 min
May 25, 5:53 PM CDTSpecial Weather StatementOUNHardeman37 min
May 25, 6:02 PM CDTSevere Thunderstorm WarningOUNFoard, Hardeman43 min
May 25, 6:25 PM CDTSevere Thunderstorm WarningOUNFoard, Hardeman30 min
May 25, 6:34 PM CDTSpecial Weather StatementOUNWilbarger26 min
May 25, 6:37 PM CDTSpecial Weather StatementOUNFoard23 min
May 25, 6:43 PM CDTSpecial Weather StatementOUNWilbarger32 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018Every 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.