Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 310, NWS Norman, OK

May 20, 2019Ellis County, Harper County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 20, 2019, 7:56 AM CDT for Ellis County, Harper County, Oklahoma. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 20, 2019, 7:56 AM CDT (12:56 UTC)
Expired
May 20, 2019, 8:30 AM CDT
In force
34 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Ellis County, OK, Harper County, OK

The radar

The Dodge City radar (KDDC), 122 km from the middle of the area, began a volume at 12:56 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 20, 7:09 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 0.9 hours before the alert went out and 122 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 12:00Z on 2019-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2019-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 261 square meters per square second.193958Sfc1 km3 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
852 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
261 m²/s²
0-3 km storm-relative helicity
390 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

710 
WUUS54 KOUN 201256
SVROUN
OKC045-059-201330-
/O.NEW.KOUN.SV.W.0310.190520T1256Z-190520T1330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
756 AM CDT Mon May 20 2019

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Northwestern Ellis County in northwestern Oklahoma...
  Western Harper County in northwestern Oklahoma...

* Until 830 AM CDT.

* At 755 AM CDT, a severe thunderstorm was located 4 miles southwest
  of Laverne, moving east at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3659 9960 3659 9961 3656 10000 3680 10000
      3693 9963
TIME...MOT...LOC 1255Z 256DEG 33KT 3667 9997 

HAIL...1.00IN
WIND...60MPH
 
$$

Ware
1 follow-up statement
534 
WWUS54 KOUN 201311
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
811 AM CDT Mon May 20 2019

OKC045-059-201330-
/O.CON.KOUN.SV.W.0310.000000T0000Z-190520T1330Z/
Ellis OK-Harper OK-
811 AM CDT Mon May 20 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR NORTH CENTRAL ELLIS AND WESTERN HARPER COUNTIES...

At 811 AM CDT, a severe thunderstorm was located 6 miles east of
Laverne, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Buffalo and May. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3659 9960 3659 9961 3657 9986 3683 9991
      3693 9963
TIME...MOT...LOC 1311Z 256DEG 33KT 3671 9978 

HAIL...1.00IN
WIND...60MPH
 
$$

Ware

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 7:35 AM CDTSevere Thunderstorm WarningOUNEllis40 min
May 20, 8:10 AM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woodward50 min
May 20, 8:30 AM CDTAreal Flood AdvisoryOUNEllis, Harper, Woods, Woodward3 hr
May 20, 8:33 AM CDTRiver Flood WarningOUNCuster, Washita4 days
May 20, 8:35 AM CDTRiver Flood WarningOUNCaddo, Kiowa, Washita21 days
May 20, 8:39 AM CDTRiver Flood WarningOUNCaddo, Garvin, Grady21 days
May 20, 8:49 AM CDTSevere Thunderstorm WarningOUNHarper, Major, Woods, Woodward41 min
May 20, 8:59 AM CDTSpecial Weather StatementOUNAlfalfa, Major31 min
May 20, 9:00 AM CDTSpecial Weather StatementOUNLogan30 min
May 20, 9:04 AM CDTSpecial Weather StatementOUNWoodward26 min
May 20, 9:09 AM CDTRiver Flood WarningOUNDewey, Major, Woodward5 days
May 20, 9:11 AM CDTRiver Flood WarningOUNBlaine, Canadian61 hr
May 20, 9:11 AM CDTRiver Flood WarningOUNCanadian46 hr
May 20, 9:12 AM CDTRiver Flood WarningOUNCanadian, Oklahoma3 days
May 20, 9:15 AM CDTRiver Flood WarningOUNOklahoma43 hr
May 20, 9:16 AM CDTRiver Flood WarningOUNLincoln, Oklahoma, Pottawatomie4 days
May 20, 9:16 AM CDTSpecial Weather StatementOUNPayne29 min
May 20, 9:27 AM CDTSpecial Weather StatementOUNAlfalfa, Garfield, Grant, Noble33 min
May 20, 9:28 AM CDTAreal Flood AdvisoryOUNAlfalfa, Woods2 hr
May 20, 9:32 AM CDTRiver Flood WarningOUNGrady21 days
May 20, 9:33 AM CDTRiver Flood WarningOUNGarvin60 hr
May 20, 9:33 AM CDTSevere Thunderstorm WarningOUNLogan, Noble, Payne42 min
May 20, 9:39 AM CDTRiver Flood WarningOUNJackson, Kiowa, Tillman12 days
May 20, 9:40 AM CDTRiver Flood WarningOUNCotton, Jefferson, Tillman21 days
May 20, 9:41 AM CDTRiver Flood WarningOUNCotton4 days
May 20, 9:42 AM CDTRiver Flood WarningOUNComanche, Cotton5 days
May 20, 9:43 AM CDTSpecial Weather StatementOUNLincoln32 min
May 20, 9:45 AM CDTRiver Flood WarningOUNMajor, Woods, Woodward11 days
May 20, 9:47 AM CDTRiver Flood WarningOUNKingfisher, Logan10 days
May 20, 9:48 AM CDTRiver Flood WarningOUNLogan, Payne4 days
May 20, 9:49 AM CDTRiver Flood WarningOUNPayne21 days
May 20, 9:51 AM CDTRiver Flood WarningOUNGrant, Kay, Noble23 days
May 20, 9:52 AM CDTRiver Flood WarningOUNPottawatomie, Seminole49 hr
May 20, 9:53 AM CDTRiver Flood WarningOUNBlaine, Caddo, Canadian, Custer3 days
May 20, 9:53 AM CDTSpecial Weather StatementOUNGrant, Kay, Noble37 min
May 20, 9:54 AM CDTRiver Flood WarningOUNCleveland, McClain65 hr
May 20, 10:18 AM CDTRiver Flood WarningOUNLogan52 hr
May 20, 10:22 AM CDTRiver Flood WarningOUNLogan59 hr
May 20, 10:27 AM CDTSpecial Weather StatementOUNAlfalfa, Major33 min
May 20, 10:40 AM CDTSpecial Weather StatementOUNHarper35 min
May 20, 10:49 AM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woodward41 min
May 20, 10:53 AM CDTAreal Flood AdvisoryOUNGrant, Kay3 hr
May 20, 10:54 AM CDTRiver Flood WarningOUNKingfisher41 hr
May 20, 10:56 AM CDTRiver Flood WarningOUNKingfisher45 hr
May 20, 11:15 AM CDTSpecial Weather StatementOUNGrant30 min
May 20, 11:28 AM CDTSpecial Weather StatementOUNHarper32 min
May 20, 11:43 AM CDTSpecial Weather StatementOUNGarfield, Kay32 min
May 20, 11:49 AM CDTAreal Flood AdvisoryOUNAlfalfa, Ellis, Harper, Woods, Woodward116 min
May 20, 11:58 AM CDTSpecial Weather StatementOUNWoodward32 min
May 20, 12:03 PM CDTAreal Flood AdvisoryOUNAlfalfa, Garfield, Major, Noble, Woods, Woodward117 min
May 20, 12:22 PM CDTSpecial Weather StatementOUNPayne38 min
May 20, 12:24 PM CDTSpecial Weather StatementOUNWoods36 min
May 20, 12:26 PM CDTSpecial Weather StatementOUNKay34 min
May 20, 12:40 PM CDTSpecial Weather StatementOUNCoal, Hughes, Pontotoc, Seminole35 min
May 20, 12:43 PM CDTSpecial Weather StatementOUNCaddo32 min
May 20, 12:55 PM CDTSpecial Weather StatementOUNAlfalfa35 min
May 20, 1:07 PM CDTSpecial Weather StatementOUNNoble23 min
May 20, 1:40 PM CDTSpecial Weather StatementOUNRoger Mills35 min
May 20, 1:45 PM CDTAreal Flood AdvisoryOUNAlfalfa, Ellis, Garfield, Grant, Harper, Kay and 4 more4 hr
May 20, 2:04 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills56 min
May 20, 2:15 PM CDTSevere Thunderstorm WarningOUNCuster, Dewey, Roger Mills45 min
May 20, 2:24 PM CDTSpecial Weather StatementOUNCanadian36 min
May 20, 2:24 PM CDTTornado WarningOUNCuster, Ellis, Roger Mills51 min
May 20, 2:27 PM CDTSevere Thunderstorm WarningOUNCaddo, Canadian, Grady33 min
May 20, 2:38 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills52 min
May 20, 2:52 PM CDTSevere Thunderstorm WarningOUNCuster, Dewey, Ellis, Major, Roger Mills, Woodward68 min
May 20, 2:53 PM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher52 min
May 20, 2:55 PM CDTTornado WarningOUNCanadian, Kingfisher50 min
May 20, 3:04 PM CDTRiver Flood WarningOUNGrant, Kay3 days
May 20, 3:09 PM CDTRiver Flood WarningOUNBlaine, Kingfisher, Major3 days
May 20, 3:12 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant48 min
May 20, 3:13 PM CDTAreal Flood AdvisoryOUNDewey, Major, Woodward2 hr
May 20, 3:21 PM CDTSevere Thunderstorm WarningOUNRoger Mills39 min
May 20, 3:26 PM CDTSevere Thunderstorm WarningOUNBlaine, Dewey34 min
May 20, 3:29 PM CDTRiver Flood WarningOUNWoodward58 hr
May 20, 3:34 PM CDTTornado Warning Tornado observedOUNKingfisher, Logan41 min
May 20, 3:42 PM CDTRiver Flood WarningOUNPottawatomie36 hr
May 20, 3:45 PM CDTFlash Flood WarningOUNGarfield, Grant, Kay, Noble3 hr
May 20, 3:52 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kay, Noble53 min
May 20, 3:55 PM CDTTornado WarningOUNHarmon50 min

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.