Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 69, NWS Omaha, NE

June 24, 20216 counties in Nebraska; Fremont County, Mills County, Montgomery County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jun 24, 2021, 2:51 AM CDT for 6 counties in Nebraska; Fremont County, Mills County, Montgomery County, Iowa. It was in force for 39 min. 5 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 24, 2021, 2:51 AM CDT (07:51 UTC)
Expired: Jun 24, 2021, 3:30 AM CDT
In force: 39 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Fremont County, IA, Mills County, IA, Montgomery County, IA, Cass County, NE, Gage County, NE, Johnson County, NE, Lancaster County, NE, Otoe County, NE, Sarpy County, NE

The radar

The Omaha radar (KOAX), 68 km from the middle of the area, began a volume at 07:50 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 24, 2:56 AM CDT	TSTM WND GST 63	Louisville, NE	MEASURED ON PERSONAL WEATHER STATION.
Jun 24, 2:59 AM CDT	TSTM WND DMG	1 Nne Papillion, NE	TREE SNAPPED OFF IN BACK YARD. REPORT TIME BASED ON RADAR.
Jun 24, 3:12 AM CDT	TSTM WND GST 66	2 Sw Papillion, NE	MEASURED ON PERSONAL WEATHER STATION.
Jun 24, 3:25 AM CDT	TSTM WND DMG	4 Ne South Bend, NE	LARGE TREE DOWNED AND SWING SET OVERTURNED. TIME ESTIMATED FROM RADAR.
Jun 24, 3:39 AM CDT	HAIL 1	1 Se Nebraska City, NE	REPORT FROM MPING: QUARTER (1.00 IN.).

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 23, 10:37 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 24, 2:20 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 7.9 hours before the alert went out and 68 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: 2039 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 1664 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

946 
WUUS53 KOAX 240751
SVROAX
IAC071-129-137-NEC025-067-097-109-131-153-240830-
/O.NEW.KOAX.SV.W.0069.210624T0751Z-210624T0830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
251 AM CDT Thu Jun 24 2021

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Northwestern Fremont County in southwestern Iowa...
  Northwestern Montgomery County in southwestern Iowa...
  Mills County in southwestern Iowa...
  Sarpy County in east central Nebraska...
  Southern Lancaster County in southeastern Nebraska...
  Johnson County in southeastern Nebraska...
  Otoe County in southeastern Nebraska...
  Northeastern Gage County in southeastern Nebraska...
  Cass County in southeastern Nebraska...

* Until 330 AM CDT.

* At 250 AM CDT, severe thunderstorms were located along a line
  extending from Omaha to 7 miles northwest of Hickman, moving
  southeast at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Papillion and La Vista around 255 AM CDT.
  Bellevue, Bennet and Offutt AFB around 300 AM CDT.
  Firth and Panama around 305 AM CDT.
  Plattsmouth and Douglas around 310 AM CDT.

Other locations in the path of these severe thunderstorms include
Glenwood, Pacific Junction, Sterling, Malvern and Tecumseh.

This includes the following highways...
 Interstate 29 between mile markers 10 and 42.
 Interstate 80 in Nebraska between mile markers 411 and 444.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4070 9684 4119 9612 4117 9585 4116 9587
      4116 9528 4052 9593 4052 9607 4039 9606
      4026 9619 4026 9645
TIME...MOT...LOC 0750Z 311DEG 43KT 4125 9602 4071 9671 

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

Nicolaisen

1 follow-up statement

831 
WWUS53 KOAX 240812
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
312 AM CDT Thu Jun 24 2021

IAC071-129-137-NEC025-067-097-109-131-153-240830-
/O.CON.KOAX.SV.W.0069.000000T0000Z-210624T0830Z/
Fremont IA-Montgomery IA-Mills IA-Sarpy NE-Lancaster NE-Johnson NE-
Otoe NE-Gage NE-Cass NE-
312 AM CDT Thu Jun 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM CDT
FOR NORTHWESTERN FREMONT...NORTHWESTERN MONTGOMERY...MILLS...SARPY...
SOUTHERN LANCASTER...JOHNSON...OTOE...NORTHEASTERN GAGE AND CASS
COUNTIES...

At 311 AM CDT, severe thunderstorms were located along a line
extending from near Glenwood to near Panama, moving southeast at 50
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated. Papillion, NE reported a 41mph gust at 
         3:04 AM. 

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

Locations impacted include...
  Plattsmouth, Glenwood, Pacific Junction, Sterling, Malvern and 
  Tecumseh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4070 9684 4119 9612 4117 9585 4116 9587
      4116 9528 4052 9593 4052 9607 4039 9606
      4026 9619 4026 9645
TIME...MOT...LOC 0811Z 311DEG 43KT 4109 9579 4056 9648 

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

Nicolaisen

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 11:27 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Madison, Pierce	48 min
Jun 24, 12:12 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Madison, Pierce, Stanton, Wayne	48 min
Jun 24, 12:40 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Madison, Platte	50 min
Jun 24, 12:58 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Colfax, Cuming, Madison, Pierce and 3 more	47 min
Jun 24, 1:11 AM CDT	Tornado Warning	OAX	Madison, Stanton	34 min
Jun 24, 1:22 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Butler, Colfax, Cuming, Dodge, Madison and 5 more	23 min
Jun 24, 1:41 AM CDT	Tornado Warning	OAX	Colfax, Cuming, Dodge, Stanton	34 min
Jun 24, 1:43 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Butler, Colfax, Cuming, Dodge, Douglas and 7 more	47 min
Jun 24, 1:55 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Dodge, Lancaster, Saunders, Seward	50 min
Jun 24, 2:15 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cass, Dodge, Douglas, Sarpy, Saunders and 2 more	60 min
Jun 24, 2:24 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Gage, Jefferson, Lancaster, Otoe, Saline and 1 more	51 min
Jun 24, 2:54 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Gage, Johnson, Lancaster, Otoe, Sarpy	36 min
Jun 24, 3:17 AM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe, Pawnee, Richardson	58 min
Jun 24, 2:23 PM CDT	Flash Flood Watch	OAX	Cass, Gage, Jefferson, Johnson, Lancaster, Nemaha and 4 more	37 hr
Jun 24, 5:10 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Otoe	40 min
Jun 24, 5:34 PM CDT	Flash Flood Warning	OAX	Cass, Lancaster, Otoe	4 hr
Jun 24, 5:35 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Saline, Seward	40 min
Jun 24, 5:43 PM CDT	Tornado Warning	OAX	Otoe	47 min
Jun 24, 5:51 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy, Saunders	54 min
Jun 24, 5:55 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	50 min
Jun 24, 6:07 PM CDT	Tornado Warning	OAX	Otoe	38 min
Jun 24, 6:12 PM CDT	Flash Flood Warning	OAX	Pawnee, Richardson	8 hr
Jun 24, 6:12 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline, Seward	48 min
Jun 24, 6:16 PM CDT	Special Weather Statement	OAX	Douglas	89 min
Jun 24, 6:28 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	47 min
Jun 24, 6:32 PM CDT	Flash Flood Warning	OAX	Cass	3 hr
Jun 24, 6:34 PM CDT	Tornado Warning	OAX	Richardson	41 min
Jun 24, 6:43 PM CDT	Severe Thunderstorm Warning	OAX	Otoe	47 min
Jun 24, 6:48 PM CDT	Flash Flood Warning	OAX	Saline, Seward	3 hr

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