Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 477, NWS Norman, OK

May 27, 2019Ellis County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 27, 2019, 3:02 AM CDT for Ellis County, Woodward County, Oklahoma. It was in force for 28 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 27, 2019, 3:02 AM CDT (08:02 UTC)
Expired
May 27, 2019, 3:30 AM CDT
In force
28 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Ellis County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 132 km from the middle of the area, began a volume at 08:02 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 26, 7:55 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 8.0 hours before the alert went out and 165 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 2019-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 739 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 2019-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.19395878Sfc1 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
739 J/kg
Mixed-layer CIN
-155 J/kg
Mixed-layer LCL
975 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

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 27, 12:45 AM CDT, 2 hours 17 minutes earlier.

Area forecast discussion, May 27, 12:45 AM CDT, 2 hours 17 minutes before
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Hazardous weather outlook, May 26, 11:55 AM CDT, 15 hours 7 minutes before
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In the hours before

Special weather statement, May 27, 12:52 AM CDT, 2 hours 10 minutes before
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 9:03 PM CDTRiver Flood WarningOUNLove4 days
May 26, 10:53 PM CDTSevere Thunderstorm WarningOUNEllis, Harper37 min
May 26, 11:24 PM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woods, Woodward51 min
May 27, 12:13 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Ellis, Harper, Major, Woods, Woodward47 min
May 27, 12:52 AM CDTSpecial Weather StatementOUNDewey38 min
May 27, 12:56 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant, Woods, Woodward49 min
May 27, 1:27 AM CDTAreal Flood AdvisoryOUNWoods3 hr
May 27, 1:39 AM CDTAreal Flood WarningOUNGarfield, Grant, Kay, Noble12 hr
May 27, 1:42 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods48 min
May 27, 2:11 AM CDTAreal Flood WarningOUNAlfalfa, Harper, Woods, Woodward6 hr
May 27, 2:21 AM CDTSevere Thunderstorm WarningOUNEllis39 min
May 27, 2:40 AM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woodward50 min
May 27, 3:15 AM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woods, Woodward45 min
May 27, 3:47 AM CDTSpecial Weather StatementOUNWoods28 min
May 27, 3:49 AM CDTAreal Flood WarningOUNWoodward4 hr
May 27, 3:58 AM CDTSpecial Weather StatementOUNWoods, Woodward32 min
May 27, 4:00 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods, Woodward45 min
May 27, 4:37 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant38 min
May 27, 5:13 AM CDTSpecial Weather StatementOUNGrant32 min
May 27, 5:43 AM CDTSpecial Weather StatementOUNKay32 min
May 27, 4:19 PM CDTAreal Flood WarningOUNGreer, Kiowa36 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2019Every severe thunderstorm warning in 2019

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.