Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS Omaha, NE

June 11, 20214 counties in Nebraska; Monona County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jun 11, 2021, 7:34 AM CDT for 4 counties in Nebraska; Monona County, Iowa. It was in force for 26 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, 7:34 AM CDT (12:34 UTC)
Expired: Jun 11, 2021, 8:00 AM CDT
In force: 26 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Monona County, IA, Burt County, NE, Cuming County, NE, Dodge County, NE, Thurston County, NE

The radar

The Omaha radar (KOAX), 58 km from the middle of the area, began a volume at 12:34 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 12:00Z, 0.6 hours before the alert went out and 58 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: 2132 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 899 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

721 
WUUS53 KOAX 111234
SVROAX
IAC133-NEC021-039-053-173-111300-
/O.NEW.KOAX.SV.W.0032.210611T1234Z-210611T1300Z/

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

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Western Monona County in west central Iowa...
  Burt County in east central Nebraska...
  Southeastern Cuming County in northeastern Nebraska...
  Northern Dodge County in east central Nebraska...
  Southeastern Thurston County in northeastern Nebraska...

* Until 800 AM CDT.

* At 733 AM CDT, severe thunderstorms were located along a line
  extending from near Sloan to 4 miles west of Decatur to near Dodge,
  moving southeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Decatur around 740 AM CDT.
  Scribner around 750 AM CDT.

Other locations in the path of these severe thunderstorms include
Onawa and Tekamah.

This includes Interstate 29 between mile markers 101 and 125.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4215 9596 4187 9609 4186 9614 4184 9611
      4177 9614 4168 9638 4168 9644 4166 9644
      4154 9677 4172 9691 4174 9690 4175 9694
      4204 9639 4222 9628
TIME...MOT...LOC 1233Z 326DEG 32KT 4219 9626 4199 9634 4175 9689 

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

Mead

1 follow-up statement

785 
WWUS53 KOAX 111258
SVSOAX

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

IAC133-NEC021-039-053-173-111307-
/O.EXP.KOAX.SV.W.0032.000000T0000Z-210611T1300Z/
Monona IA-Burt NE-Cuming NE-Dodge NE-Thurston NE-
758 AM CDT Fri Jun 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MONONA...BURT...
SOUTHEASTERN CUMING...NORTHERN DODGE AND SOUTHEASTERN THURSTON
COUNTIES WILL EXPIRE AT 800 AM CDT...
    
The storms which prompted the warning have moved out of the area.
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
southwestern and west central Iowa...and northeastern and east
central Nebraska.

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Monona and Burt counties until 830 AM.

LAT...LON 4215 9596 4187 9609 4186 9614 4184 9611
      4177 9614 4168 9638 4168 9644 4166 9644
      4154 9677 4172 9691 4174 9690 4175 9694
      4204 9639 4222 9628
TIME...MOT...LOC 1257Z 326DEG 32KT 4201 9610 4181 9618 4157 9673 

$$

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, 5:55 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Cedar, Knox, Pierce, Wayne	35 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, 7:41 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 Severe Thunderstorm Warnings in Iowa, 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.