Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 37, NWS Omaha, NE

June 11, 2021Johnson County, Nemaha County, Otoe County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 11, 2021, 10:51 AM CDT for Johnson County, Nemaha County, Otoe County, Nebraska. It was in force for 39 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 11, 2021, 10:51 AM CDT (15:51 UTC)
Expired: Jun 11, 2021, 11:30 AM CDT
In force: 39 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Johnson County, NE, Nemaha County, NE, Otoe County, NE

The radar

The Omaha radar (KOAX), 102 km from the middle of the area, began a volume at 15:52 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.

What was reported inside it

Time	Report	Where	Remark
Jun 11, 11:00 AM CDT	HAIL 1	Sterling, NE
Jun 11, 11:25 AM CDT	TSTM WND DMG	2 Ne Tecumseh, NE	METAL ROOF ON LARGE FARM OUTBUILDING PEELED BACK. RECEIVED ON SOCIAL MEDIA. TIME ESTIMATED.
Jun 11, 11:39 AM CDT	HAIL 1	1 Wnw Auburn, NE
Jun 11, 11:40 AM CDT	HAIL 1.75	3 Ene Tecumseh, NE	MPING REPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 8:30 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 3.9 hours before the alert went out and 102 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.

847 
WUUS53 KOAX 111551
SVROAX
NEC097-127-131-111630-
/O.NEW.KOAX.SV.W.0037.210611T1551Z-210611T1630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
1051 AM CDT Fri Jun 11 2021

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Johnson County in southeastern Nebraska...
  Nemaha County in southeastern Nebraska...
  Southern Otoe County in southeastern Nebraska...

* Until 1130 AM CDT.

* At 1051 AM CDT, severe thunderstorms were located along a line
  extending from near Palmyra to 5 miles south of Sterling, moving
  east at 30 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...
  Auburn, Syracuse, Tecumseh, Sterling, Johnson, Cook, Talmage,
  Douglas, Lorton, Brock, Elk Creek, Julian, Burr, Crab Orchard and 8
  Miles South Of Johnson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4027 9647 4068 9646 4064 9579 4036 9574
      4026 9599
TIME...MOT...LOC 1551Z 273DEG 26KT 4066 9634 4039 9640 

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

BLB

2 follow-up statements

673 
WWUS53 KOAX 111606
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
1106 AM CDT Fri Jun 11 2021

NEC097-127-131-111630-
/O.CON.KOAX.SV.W.0037.000000T0000Z-210611T1630Z/
Johnson NE-Nemaha NE-Otoe NE-
1106 AM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT
FOR JOHNSON...NEMAHA AND SOUTHERN OTOE COUNTIES...

At 1105 AM CDT, severe thunderstorms were located along a line
extending from Syracuse to 4 miles west of Tecumseh, moving east at
30 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...
Auburn, Tecumseh, Sterling, Johnson, Cook, Talmage, Douglas, Lorton,
Brock, Elk Creek, Julian, Burr, Crab Orchard and 8 Miles South Of
Johnson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4029 9643 4066 9641 4064 9579 4036 9574
      4026 9599
TIME...MOT...LOC 1605Z 273DEG 26KT 4065 9621 4038 9627 

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

Mead

921 
WWUS53 KOAX 111614
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
1114 AM CDT Fri Jun 11 2021

NEC097-127-131-111630-
/O.CON.KOAX.SV.W.0037.000000T0000Z-210611T1630Z/
Johnson NE-Nemaha NE-Otoe NE-
1114 AM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT
FOR JOHNSON...NEMAHA AND SOUTHERN OTOE COUNTIES...

At 1114 AM CDT, severe thunderstorms were located along a line
extending from 4 miles north of Cook to 4 miles southeast of
Tecumseh, moving east at 30 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...
Auburn, Tecumseh, Sterling, Johnson, Cook, Talmage, Douglas, Lorton,
Brock, Elk Creek, Julian, Burr, Crab Orchard and 8 Miles South Of
Johnson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4029 9643 4066 9641 4064 9579 4036 9574
      4026 9599
TIME...MOT...LOC 1614Z 286DEG 28KT 4057 9618 4032 9614 

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

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, 7:34 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.