Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 173, NWS Norman, OK

April 19, 2015Garfield County, Grant County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 19, 2015, 3:13 PM CDT for Garfield County, Grant County, Oklahoma. It was in force for 32 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
Apr 19, 2015, 3:13 PM CDT (20:13 UTC)
Expired
Apr 19, 2015, 3:45 PM CDT
In force
32 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 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 20:13 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 12:00Z, 8.2 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 12:00Z on 2015-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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 12:00Z on 2015-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 square meters per square second.193958Sfc1 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
4 J/kg
Mixed-layer CIN
-300 J/kg
Mixed-layer LCL
1275 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
239 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 Apr 19, 2:39 PM CDT, 34 minutes earlier.

Area forecast discussion, Apr 19, 2:39 PM CDT, 34 minutes before
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Hazardous weather outlook, Apr 19, 11:55 AM CDT, 3 hours 18 minutes before
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In the hours before

Special weather statement, Apr 19, 2:21 PM CDT, 52 minutes before
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Special weather statement, Apr 19, 2:35 PM CDT, 38 minutes before
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Special weather statement, Apr 19, 2:48 PM CDT, 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
248 PM CDT SUN APR 19 2015

OKZ029-030-192015-
POTTAWATOMIE OK-CLEVELAND OK-
248 PM CDT SUN APR 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN POTTAWATOMIE AND
NORTHEASTERN CLEVELAND COUNTIES UNTIL 315 PM CDT...

AT 243 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER NORTHEASTERN
NORMAN...MOVING EAST AT 25 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3522 9737 3537 9734 3537 9696 3513 9698
TIME...MOT...LOC 1943Z 283DEG 23KT 3529 9726
Special weather statement, Apr 19, 3:07 PM CDT, 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
307 PM CDT SUN APR 19 2015

OKZ008-013-192030-
NOBLE OK-KAY OK-
307 PM CDT SUN APR 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN NOBLE AND SOUTHWESTERN
KAY COUNTIES UNTIL 330 PM CDT...

AT 305 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
4 MILES EAST OF MCCORD TO 3 MILES WEST OF RED ROCK...MOVING EAST AT
25 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
BRIEF SHORT-LIVED FUNNEL ARE POSSIBLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3668 9693 3670 9704 3668 9706 3660 9704
      3659 9706 3658 9700 3660 9691 3658 9689
      3655 9690 3653 9699 3651 9701 3651 9703
      3636 9703 3643 9740 3670 9736 3671 9692
TIME...MOT...LOC 2005Z 275DEG 22KT 3666 9696 3647 9724
Special weather statement, Apr 19, 3:08 PM CDT, 5 minutes before
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Special weather statement, Apr 19, 3:09 PM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
309 PM CDT SUN APR 19 2015

OKZ007-012-192045-
GRANT OK-GARFIELD OK-
309 PM CDT SUN APR 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL GRANT AND NORTH
CENTRAL GARFIELD COUNTIES UNTIL 345 PM CDT...

AT 308 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES WEST OF
POND CREEK...MOVING SOUTHEAST AT 25 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3662 9798 3674 9791 3665 9762 3646 9782
TIME...MOT...LOC 2008Z 307DEG 20KT 3664 9789

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 7:00 PM CDTSevere Thunderstorm WarningOUNMajor, Woodward22 min
Apr 18, 7:09 PM CDTSevere Thunderstorm WarningOUNBlaine, Caddo, Canadian, Custer, Dewey, Kingfisher and 1 more51 min
Apr 18, 7:10 PM CDTSevere Thunderstorm WarningOUNDewey, Ellis, Roger Mills50 min
Apr 18, 7:12 PM CDTSevere Thunderstorm WarningOUNGarvin, Murray48 min
Apr 18, 7:24 PM CDTSevere Thunderstorm WarningOUNCleveland, Lincoln, McClain, Oklahoma, Pottawatomie, Seminole51 min
Apr 18, 7:32 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills28 min
Apr 18, 7:54 PM CDTSpecial Weather StatementOUNMarshall51 min
Apr 18, 7:57 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills48 min
Apr 18, 8:07 PM CDTSevere Thunderstorm WarningOUNMajor, Woodward38 min
Apr 18, 8:09 PM CDTSpecial Weather StatementOUNAlfalfa36 min
Apr 18, 8:12 PM CDTSpecial Weather StatementOUNLincoln, Pottawatomie, Seminole48 min
Apr 18, 8:16 PM CDTSpecial Weather StatementOUNGarvin, Murray44 min
Apr 18, 8:24 PM CDTSpecial Weather StatementOUNAtoka, Marshall51 min
Apr 18, 8:25 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant50 min
Apr 18, 8:31 PM CDTSpecial Weather StatementOUNCuster, Dewey44 min
Apr 18, 8:36 PM CDTSevere Thunderstorm WarningOUNDewey, Major, Woodward39 min
Apr 18, 8:43 PM CDTSevere Thunderstorm WarningOUNMajor, Woods, Woodward32 min
Apr 18, 8:45 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Dewey, Roger Mills, Washita30 min
Apr 18, 8:47 PM CDTSpecial Weather StatementOUNNoble28 min
Apr 18, 9:13 PM CDTSpecial Weather StatementOUNAlfalfa, Grant, Major47 min
Apr 18, 9:14 PM CDTSpecial Weather StatementOUNSeminole46 min
Apr 18, 9:38 PM CDTAreal Flood AdvisoryOUNAtoka, Bryan, Carter, Johnston, Love, Marshall3 hr
Apr 18, 9:42 PM CDTSpecial Weather StatementOUNHughes, Pontotoc33 min
Apr 18, 10:15 PM CDTSpecial Weather StatementOUNGarfield30 min
Apr 18, 10:40 PM CDTSpecial Weather StatementOUNHughes20 min
Apr 19, 4:41 AM CDTSpecial Weather StatementOUNBlaine49 min
Apr 19, 5:27 AM CDTSpecial Weather StatementOUNBlaine, Kingfisher48 min
Apr 19, 10:47 AM CDTWind AdvisoryOUNAlfalfa, Beckham, Blaine, Caddo, Custer, Dewey and 11 more6 hr
Apr 19, 11:14 AM CDTSpecial Weather StatementOUNHarper46 min
Apr 19, 12:09 PM CDTSpecial Weather StatementOUNHarper36 min
Apr 19, 1:01 PM CDTSpecial Weather StatementOUNWoods, Woodward44 min
Apr 19, 2:00 PM CDTSpecial Weather StatementOUNKay30 min
Apr 19, 2:17 PM CDTSpecial Weather StatementOUNCleveland28 min
Apr 19, 2:21 PM CDTSpecial Weather StatementOUNKay24 min
Apr 19, 2:35 PM CDTSpecial Weather StatementOUNLincoln25 min
Apr 19, 2:48 PM CDTSpecial Weather StatementOUNCleveland27 min
Apr 19, 3:07 PM CDTSpecial Weather StatementOUNNoble23 min
Apr 19, 3:08 PM CDTSpecial Weather StatementOUNMajor37 min
Apr 19, 3:09 PM CDTSpecial Weather StatementOUNGrant36 min
Apr 19, 3:32 PM CDTSpecial Weather StatementOUNKay28 min
Apr 19, 4:13 PM CDTSpecial Weather StatementOUNPayne32 min
Apr 19, 4:16 PM CDTSpecial Weather StatementOUNPayne29 min
Apr 19, 4:33 PM CDTSpecial Weather StatementOUNAtoka27 min
Apr 19, 4:40 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal35 min
Apr 19, 4:45 PM CDTSpecial Weather StatementOUNLincoln30 min
Apr 19, 5:14 PM CDTSpecial Weather StatementOUNAtoka31 min
Apr 19, 5:42 PM CDTSevere Thunderstorm WarningOUNAtoka18 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015Every severe thunderstorm warning in 2015

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.