Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Omaha, NE

June 11, 20215 counties in Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 11, 2021, 5:55 AM CDT for 5 counties in Nebraska. It was in force for 35 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: Jun 11, 2021, 5:55 AM CDT (10:55 UTC)
Expired: Jun 11, 2021, 6:30 AM CDT
In force: 35 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Antelope County, NE, Cedar County, NE, Knox County, NE, Pierce County, NE, Wayne County, NE

The radar

The Sioux Falls radar (KFSD), 119 km from the middle of the area, began a volume at 10:56 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.

Issued	Product	Office	Lasted
Jun 11, 5:36 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 10.9 hours before the alert went out and 177 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: 1135 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 2153 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

692 
WUUS53 KOAX 111055
SVROAX
NEC003-027-107-139-179-111130-
/O.NEW.KOAX.SV.W.0028.210611T1055Z-210611T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
555 AM CDT Fri Jun 11 2021

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Northwestern Wayne County in northeastern Nebraska...
  Pierce County in northeastern Nebraska...
  Antelope County in northeastern Nebraska...
  Knox County in northeastern Nebraska...
  Cedar County in northeastern Nebraska...

* Until 630 AM CDT.

* At 554 AM CDT, severe thunderstorms were located along a line
  extending from near Yankton to 7 miles northeast of Bloomfield to 6
  miles northwest of Orchard, moving southeast at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Hartington around 605 AM CDT.
  Wynot around 610 AM CDT.

Other locations in the path of these severe thunderstorms include
Neligh and Coleridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4256 9830 4275 9772 4283 9768 4286 9761
      4285 9744 4287 9742 4285 9736 4287 9731
      4285 9722 4281 9721 4277 9713 4276 9702
      4227 9702 4226 9699 4208 9829
TIME...MOT...LOC 1054Z 307DEG 53KT 4290 9735 4267 9753 4242 9829 

HAIL...<.75IN
WIND...60MPH
 
$$

Mead

2 follow-up statements

497 
WWUS53 KOAX 111107
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
607 AM CDT Fri Jun 11 2021

NEC003-027-107-139-179-111130-
/O.CON.KOAX.SV.W.0028.000000T0000Z-210611T1130Z/
Wayne NE-Pierce NE-Antelope NE-Knox NE-Cedar NE-
607 AM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT
FOR NORTHWESTERN WAYNE...PIERCE...ANTELOPE...SOUTHERN KNOX AND CEDAR
COUNTIES...

At 607 AM CDT, severe thunderstorms were located along a line
extending from near Wynot to 5 miles southwest of Hartington to near
Ewing, moving southeast at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Hartington and Wynot around 610 AM CDT.
  Coleridge around 615 AM CDT.

Other locations in the path of these severe thunderstorms include
Neligh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4249 9829 4272 9770 4279 9758 4282 9749
      4285 9744 4287 9742 4285 9736 4287 9731
      4285 9722 4281 9721 4277 9713 4276 9702
      4227 9702 4226 9699 4208 9829
TIME...MOT...LOC 1107Z 306DEG 53KT 4279 9716 4256 9734 4229 9828 

HAIL...<.75IN
WIND...60MPH
 
$$

Mead

396 
WWUS53 KOAX 111127
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
627 AM CDT Fri Jun 11 2021

NEC003-027-107-139-179-111136-
/O.EXP.KOAX.SV.W.0028.000000T0000Z-210611T1130Z/
Wayne NE-Pierce NE-Antelope NE-Knox NE-Cedar NE-
627 AM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WAYNE...PIERCE...
ANTELOPE...SOUTHERN KNOX AND CEDAR COUNTIES WILL EXPIRE AT 630 AM
CDT...

The storms which prompted the warning have weakened. Therefore, the 
warning will be allowed to expire.
However gusty winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1100 AM CDT for
northeastern Nebraska.

LAT...LON 4249 9829 4272 9770 4279 9758 4282 9749
      4285 9744 4287 9742 4285 9736 4287 9731
      4285 9722 4281 9721 4277 9713 4276 9702
      4227 9702 4226 9699 4208 9829
TIME...MOT...LOC 1126Z 307DEG 53KT 4263 9687 4240 9705 4213 9799 

$$

Mead

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 5:27 AM CDT	Severe Thunderstorm Warning	OAX	Knox	33 min
Jun 11, 6:45 AM CDT	Severe Thunderstorm Warning	OAX	Boone	30 min
Jun 11, 7:10 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Madison, Platte, Stanton, Thurston	35 min
Jun 11, 7:24 AM CDT	Severe Thunderstorm Warning	OAX	Platte	36 min
Jun 11, 7:34 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Dodge, Thurston	26 min
Jun 11, 7:41 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Madison, Platte, Stanton	34 min
Jun 11, 7:50 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Washington	40 min
Jun 11, 8:13 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Platte	47 min
Jun 11, 8:55 AM CDT	Special Weather Statement	OAX	Cass, Douglas, Sarpy	35 min
Jun 11, 9:00 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Lancaster, Saunders, Seward	30 min
Jun 11, 10:43 AM CDT	Areal Flood Advisory	OAX	Lancaster	3 hr
Jun 11, 10:51 AM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe	39 min
Jun 11, 11:26 AM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Richardson	49 min
Jun 11, 11:45 AM CDT	Severe Thunderstorm Warning	OAX	Pawnee, Richardson	45 min
Jun 11, 12:11 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Richardson	34 min
Jun 11, 12:19 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee, Richardson	41 min
Jun 11, 12:25 PM CDT	Tornado Warning	OAX	Richardson	16 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 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.