Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 119, NWS Norman, OK

May 13, 2018Harper County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 13, 2018, 7:24 PM CDT for Harper County, Oklahoma. It was in force for 36 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 13, 2018, 7:24 PM CDT (00:24 UTC)
Expired
May 13, 2018, 8:00 PM CDT
In force
36 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

County Harper County, OK

The radar

The Dodge City radar (KDDC), 111 km from the middle of the area, began a volume at 00:25 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
May 13, 3:59 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.4 hours before the alert went out and 111 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, Dodge City, at 00:00Z on 2018-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1208 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, Dodge City, at 00:00Z on 2018-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 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
1208 J/kg
Mixed-layer CIN
-210 J/kg
Mixed-layer LCL
1618 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
354 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

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 13, 6:15 PM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, May 13, 6:15 PM CDT, 1 hour 9 minutes before
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Hazardous weather outlook, May 13, 3:02 PM CDT, 4 hours 22 minutes before
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In the hours before

Special weather statement, May 13, 4:21 PM CDT, 3 hours 3 minutes before
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Special weather statement, May 13, 6:42 PM CDT, 42 minutes before
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Special weather statement, May 13, 7:09 PM CDT, 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
709 PM CDT SUN MAY 13 2018

OKZ004-140030-
Harper OK-
709 PM CDT SUN MAY 13 2018

...SIGNIFICANT WEATHER ADVISORY FOR western Harper County Until 730
PM CDT...

AT 707 PM CDT, a strong thunderstorm was located 5 miles southwest of
Laverne, moving northeast at 35 MPH.

HAZARDS INCLUDE...
Wind gusts over 50 MPH...

Locations impacted include...
Laverne, May and Rosston.

Damaging winds may become more likely with this storm.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3697 9997 3681 9977 3659 9968 3660 10000
      3697 10000
TIME...MOT...LOC 0007Z 242DEG 29KT 3663 9995

BRB

The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 7:09 PM CDTSpecial Weather StatementOUNHarper21 min
May 13, 8:02 PM CDTSpecial Weather StatementOUNHarper28 min
May 13, 8:04 PM CDTSpecial Weather StatementOUNRoger Mills41 min
May 13, 8:14 PM CDTSpecial Weather StatementOUNEllis61 min
May 13, 8:17 PM CDTSevere Thunderstorm WarningOUNRoger Mills58 min
May 13, 8:42 PM CDTSpecial Weather StatementOUNWoods48 min
May 13, 8:46 PM CDTSpecial Weather StatementOUNHarper59 min
May 13, 8:57 PM CDTSevere Thunderstorm WarningOUNWoods44 min
May 13, 9:04 PM CDTSpecial Weather StatementOUNEllis41 min
May 13, 9:09 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills51 min
May 13, 9:13 PM CDTSpecial Weather StatementOUNRoger Mills47 min
May 13, 9:21 PM CDTSpecial Weather StatementOUNHarmon54 min
May 13, 9:31 PM CDTSpecial Weather StatementOUNDewey29 min
May 13, 9:49 PM CDTSpecial Weather StatementOUNWoods56 min
May 13, 10:26 PM CDTSpecial Weather StatementOUNGreer34 min
May 13, 10:28 PM CDTSpecial Weather StatementOUNHarmon47 min
May 13, 10:38 PM CDTSevere Thunderstorm WarningOUNBeckham37 min
May 13, 10:55 PM CDTSevere Thunderstorm WarningOUNHarmon, Jackson50 min
May 13, 11:03 PM CDTSpecial Weather StatementOUNKiowa57 min
May 13, 11:09 PM CDTSpecial Weather StatementOUNWashita21 min
May 13, 11:21 PM CDTSpecial Weather StatementOUNJackson24 min
May 13, 11:28 PM CDTSpecial Weather StatementOUNBeckham47 min
May 13, 11:35 PM CDTSpecial Weather StatementOUNWashita55 min
May 13, 11:47 PM CDTSpecial Weather StatementOUNJackson, Kiowa28 min
May 14, 12:05 AM CDTHigh Wind WarningOUNBlaine, Caddo, Custer, Washita115 min
May 14, 12:06 AM CDTSevere Thunderstorm WarningOUNJackson, Kiowa, Tillman39 min
May 14, 12:33 AM CDTSpecial Weather StatementOUNGreer27 min
May 14, 12:45 AM CDTSpecial Weather StatementOUNKiowa30 min
May 14, 12:59 AM CDTSpecial Weather StatementOUNGreer31 min
May 14, 1:12 AM CDTSpecial Weather StatementOUNComanche33 min
May 14, 1:32 AM CDTSpecial Weather StatementOUNKiowa28 min
May 14, 5:17 PM CDTSpecial Weather StatementOUNRoger Mills28 min
May 14, 5:29 PM CDTSpecial Weather StatementOUNBeckham31 min
May 14, 5:30 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Harmon45 min
May 14, 5:42 PM CDTSpecial Weather StatementOUNHarmon33 min
May 14, 5:57 PM CDTSevere Thunderstorm WarningOUNGreer, Harmon48 min
May 14, 5:58 PM CDTSpecial Weather StatementOUNBeckham32 min
May 14, 6:00 PM CDTSpecial Weather StatementOUNEllis30 min
May 14, 6:05 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills55 min
May 14, 6:09 PM CDTSevere Thunderstorm WarningOUNDewey, Ellis, Woodward51 min
May 14, 6:14 PM CDTSevere Thunderstorm WarningOUNBeckham46 min
May 14, 6:42 PM CDTSevere Thunderstorm WarningOUNMajor, Woodward48 min
May 14, 6:46 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Harmon, Jackson44 min
May 14, 6:49 PM CDTSpecial Weather StatementOUNCuster26 min
May 14, 6:56 PM CDTSevere Thunderstorm WarningOUNKay64 min
May 13, 10:33 PM CDTSevere Thunderstorm WarningOUNHardeman42 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.