Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Norman, OK

March 13, 2021Ellis County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 13, 2021, 9:11 PM CST for Ellis County, Oklahoma. It was in force for 49 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: Mar 13, 2021, 9:11 PM CST (03:11 UTC)
Expired: Mar 13, 2021, 10:00 PM CST
In force: 49 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Ellis County, OK

The radar

The Dodge City radar (KDDC), 152 km from the middle of the area, began a volume at 03:11 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

Dodge City, (KDDC), launched 00:00Z, 3.2 hours before the alert went out and 153 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 199 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 473 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 469 m²/s²
0-3 km storm-relative helicity: 534 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

As transmitted.

882 
WUUS54 KOUN 140311
SVROUN
OKC045-140400-
/O.NEW.KOUN.SV.W.0018.210314T0311Z-210314T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
911 PM CST Sat Mar 13 2021

The National Weather Service in Norman has issued a

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

* Until 1000 PM CST.

* At 910 PM CST, severe thunderstorms were located along a line
  extending from 4 miles south of Darrouzett to 9 miles east of
  Lipscomb to 3 miles east of Glazier, moving northeast at 45 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...
  Shattuck and Catesby. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3659 10000 3659 9966 3611 9987 3608 10000
TIME...MOT...LOC 0310Z 220DEG 38KT 3639 10032 3627 10010 3603 10020 

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

Mahale

1 follow-up statement

770 
WWUS54 KOUN 140344
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
944 PM CST Sat Mar 13 2021

OKC045-140400-
/O.CON.KOUN.SV.W.0018.000000T0000Z-210314T0400Z/
Ellis OK-
944 PM CST Sat Mar 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CST
FOR NORTHWESTERN ELLIS COUNTY...

At 944 PM CST, severe thunderstorms were located along a line
extending from near Slapout to 11 miles east of Follett to 5 miles
west of Higgins, moving northeast at 20 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...
Shattuck and Catesby. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3659 10000 3659 9966 3630 9979 3623 9982
      3614 10000
TIME...MOT...LOC 0344Z 205DEG 17KT 3663 10011 3646 9995 3614 10011 

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

Mahale

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 13, 7:57 PM CST	Tornado Warning	OUN	Jackson	18 min
Mar 13, 8:02 PM CST	Severe Thunderstorm Warning	OUN	Harmon, Jackson	28 min
Mar 13, 8:05 PM CST	Tornado Warning	OUN	Harmon, Jackson	25 min
Mar 13, 8:31 PM CST	Special Weather Statement	OUN	Harmon	29 min
Mar 13, 8:33 PM CST	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	42 min
Mar 13, 9:16 PM CST	Special Weather Statement	OUN	Greer	29 min
Mar 13, 9:46 PM CST	Special Weather Statement	OUN	Beckham	29 min
Mar 13, 9:52 PM CST	Special Weather Statement	OUN	Harper	23 min
Mar 13, 10:14 PM CST	Special Weather Statement	OUN	Harper	46 min
Mar 13, 10:15 PM CST	Special Weather Statement	OUN	Roger Mills	45 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Every severe thunderstorm warning in 2021

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.