Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 83, NWS Omaha, NE

June 25, 2021Boone County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 25, 2021, 7:22 PM CDT for Boone County, Nebraska. It was in force for 23 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 25, 2021, 7:22 PM CDT (00:22 UTC)
Expired: Jun 25, 2021, 7:45 PM CDT
In force: 23 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.75 in
Wind: 65.0 mph

County Boone County, NE

The radar

The Grand Island radar (KUEX), 139 km from the middle of the area, began a volume at 00:21 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 25, 3:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.4 hours before the alert went out and 139 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: 783 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1289 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

As transmitted.

929 
WUUS53 KOAX 260022
SVROAX
NEC011-260045-
/O.NEW.KOAX.SV.W.0083.210626T0022Z-210626T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
722 PM CDT Fri Jun 25 2021

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Southeastern Boone County in northeastern Nebraska...

* Until 745 PM CDT.

* At 722 PM CDT, a severe thunderstorm was located near Cedar Rapids,
  or 38 miles west of Columbus, moving east at 30 mph.

  HAZARD...Golf ball size hail and 65 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  St. Edward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4159 9816 4157 9784 4153 9783 4153 9788
      4151 9789 4151 9804 4150 9804 4150 9809
      4148 9810 4148 9817
TIME...MOT...LOC 0022Z 289DEG 25KT 4156 9808 

HAIL...1.75IN
WIND...65MPH
 
$$

Dergan

1 follow-up statement

370 
WWUS53 KOAX 260042 RRA
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
742 PM CDT Fri Jun 25 2021

NEC011-260052-
/O.EXP.KOAX.SV.W.0083.000000T0000Z-210626T0045Z/
Boone NE-
742 PM CDT Fri Jun 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BOONE COUNTY WILL
EXPIRE AT 745 PM CDT...
                
The storm which prompted the warning has weakened and no longer 
poses an immediate threat to life or property. Therefore, the 
warning will be allowed to expire. However gusty winds are still 
possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northeastern Nebraska.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Omaha.

LAT...LON 4159 9816 4157 9784 4153 9783 4153 9788
      4151 9789 4151 9804 4150 9804 4150 9809
      4148 9810 4148 9817
TIME...MOT...LOC 0042Z 289DEG 25KT 4151 9790 

$$

Dergan

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:23 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Madison, Platte, Stanton	52 min
Jun 25, 7:31 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee, Richardson	44 min
Jun 25, 9:29 PM CDT	Special Weather Statement	OAX	Lancaster	46 min
Jun 25, 9:37 PM CDT	Flash Flood Warning	OAX	Cuming	3 hr
Jun 25, 10:12 PM CDT	Special Weather Statement	OAX	Cass	33 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.