Alert archive / Iowa / Tornado Warnings in 2021
Tornado Warning 22, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Dec 15, 2021, 4:12 PM CST for Cass County, Nebraska; Fremont County, Mills County, Iowa. It was in force for 33 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
- Dec 15, 2021, 4:12 PM CST (22:12 UTC)
- Expired
- Dec 15, 2021, 4:45 PM CST
- In force
- 33 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Fremont County, IA, Mills County, IA, Cass County, NE
The radar
The Omaha radar (KOAX), 65 km from the middle of the area, began a volume at 22:15 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 |
|---|---|---|---|
| Dec 15, 4:14 PM CST | TSTM WND GST 62 | 2 S Murray, NE | MESONET STATION UP945 2.2 S MURRAY (UPR). |
| Dec 15, 4:14 PM CST | TORNADO | 5 Wnw Tabor, IA | CORRECTS PREVIOUS TORNADO REPORT FROM 5 WNW TABOR. THE TORNADO BEGAN IN THE HILLS AND ROUGH TERRAIN NEAR PEASE RD AND QUIGG AVE, AND TRAVELLED QUICKLY NORTHEAST ALONG THE 10 MILE TRACK, LASTING APPROXIMATELY 9 MINUTES. THE FIRST FEW MILES OF THE TORNADO TRACK |
| Dec 15, 4:16 PM CST | NON-TSTM WND GST 52 | 3 Sse Plattsmouth, NE | MESONET STATION FW9521 PLATTSMOUTH. |
| Dec 15, 4:22 PM CST | TSTM WND DMG | 2 N Malvern, IA | POWER LINES ACROSS HIGHWAY 34. |
| Dec 15, 4:33 PM CST | TSTM WND DMG | Murray, NE | WINDOWS BLOWN OUT AND ROOF DAMAGE. |
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 |
|---|---|---|---|
| Dec 15, 1:23 PM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.2 hours before the alert went out and 65 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2165 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 346 m²/s²
- 0-3 km storm-relative helicity
- 384 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
126
WFUS53 KOAX 152212
TOROAX
IAC071-129-NEC025-152245-
/O.NEW.KOAX.TO.W.0022.211215T2212Z-211215T2245Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Omaha/Valley Nebraska
412 PM CST Wed Dec 15 2021
The National Weather Service in Omaha has issued a
* Tornado Warning for...
Northwestern Fremont County in southwestern Iowa...
Mills County in southwestern Iowa...
East central Cass County in southeastern Nebraska...
* Until 445 PM CST.
* At 412 PM CST, a severe thunderstorm capable of producing a tornado
was located near Murray, or 24 miles south of Omaha, moving
northeast at 85 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Pacific Junction around 415 PM CST.
Glenwood and Malvern around 420 PM CST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4079 9582 4092 9598 4116 9577 4116 9539
TIME...MOT...LOC 2212Z 219DEG 74KT 4093 9585
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
CA2 follow-up statements
498
WWUS53 KOAX 152219
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
419 PM CST Wed Dec 15 2021
IAC071-NEC025-152228-
/O.CAN.KOAX.TO.W.0022.000000T0000Z-211215T2245Z/
Fremont IA-Cass NE-
419 PM CST Wed Dec 15 2021
...THE TORNADO WARNING FOR NORTHWESTERN FREMONT AND EAST CENTRAL CASS
COUNTIES IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 800 PM CST for southwestern
Iowa...and southeastern Nebraska.
LAT...LON 4090 9569 4093 9575 4104 9587 4116 9577
4116 9539
TIME...MOT...LOC 2218Z 219DEG 74KT 4104 9573
$$
IAC129-152245-
/O.CON.KOAX.TO.W.0022.000000T0000Z-211215T2245Z/
Mills IA-
419 PM CST Wed Dec 15 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CST FOR CENTRAL
MILLS COUNTY...
At 418 PM CST, a severe thunderstorm capable of producing a tornado
was located over Glenwood, or 21 miles southeast of Omaha, moving
northeast at 85 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
central Mills County, including the following locations... Silver
City and Henderson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4090 9569 4093 9575 4104 9587 4116 9577
4116 9539
TIME...MOT...LOC 2218Z 219DEG 74KT 4104 9573
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
CA429
WWUS53 KOAX 152239
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
439 PM CST Wed Dec 15 2021
IAC129-152249-
/O.EXP.KOAX.TO.W.0022.000000T0000Z-211215T2245Z/
Mills IA-
439 PM CST Wed Dec 15 2021
...THE TORNADO WARNING FOR CENTRAL MILLS COUNTY WILL EXPIRE AT 445 PM
CST...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 800 PM CST for southwestern
Iowa...and southeastern Nebraska.
LAT...LON 4090 9569 4093 9575 4104 9587 4116 9577
4116 9539
TIME...MOT...LOC 2239Z 219DEG 74KT 4135 9540
$$
CAThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 15, 2:19 PM CST | Severe Thunderstorm Warning | OAX | Antelope, Boone, Butler, Colfax, Madison, Pierce and 2 more | 56 min |
| Dec 15, 2:26 PM CST | Severe Thunderstorm Warning | OAX | Butler, Gage, Jefferson, Lancaster, Saline, Saunders and 1 more | 64 min |
| Dec 15, 2:39 PM CST | Tornado Warning | OAX | Boone, Madison, Platte, Stanton | 24 min |
| Dec 15, 2:50 PM CST | Tornado Warning | OAX | Colfax, Platte | 40 min |
| Dec 15, 2:54 PM CST | Severe Thunderstorm Warning | OAX | Cass, Dodge, Douglas, Gage, Johnson, Lancaster and 5 more | 81 min |
| Dec 15, 2:59 PM CST | Tornado Warning | OAX | Butler, Colfax, Dodge, Platte | 31 min |
| Dec 15, 3:06 PM CST | Tornado Warning | OAX | Madison, Platte, Stanton | 24 min |
| Dec 15, 3:09 PM CST | Severe Thunderstorm Warning | OAX | Burt, Butler, Colfax, Cuming, Dodge, Saunders and 4 more | 51 min |
| Dec 15, 3:13 PM CST | Severe Thunderstorm Warning | OAX | Antelope, Cedar, Colfax, Knox, Madison, Pierce and 3 more | 62 min |
| Dec 15, 3:23 PM CST | Tornado Warning | OAX | Lancaster, Seward | 16 min |
| Dec 15, 3:25 PM CST | Tornado Warning | OAX | Colfax, Cuming, Stanton | 35 min |
| Dec 15, 3:29 PM CST | Tornado Warning | OAX | Madison, Stanton, Wayne | 31 min |
| Dec 15, 3:35 PM CST | Severe Thunderstorm Warning | OAX | Cass, Douglas, Johnson, Nemaha, Otoe, Pawnee and 3 more | 70 min |
| Dec 15, 3:41 PM CST | Severe Thunderstorm Warning | OAX | Burt, Cuming, Thurston, Washington | 64 min |
| Dec 15, 3:45 PM CST | Tornado Warning | OAX | Douglas, Saunders | 30 min |
| Dec 15, 3:45 PM CST | Tornado Warning | OAX | Cuming, Thurston | 45 min |
| Dec 15, 3:54 PM CST | Tornado Warning | OAX | Dodge, Douglas, Washington | 28 min |
| Dec 15, 4:01 PM CST | Tornado Warning | OAX | Cass, Otoe | 14 min |
| Dec 15, 4:11 PM CST | Tornado Warning | OAX | Nemaha, Pawnee, Richardson | 34 min |
| Dec 15, 4:16 PM CST | Tornado Warning | OAX | Washington | 17 min |
| Dec 15, 5:08 PM CST | Blowing Dust Advisory | OAX | Cass, Gage, Jefferson, Johnson, Lancaster, Nemaha and 5 more | 4 hr |
| Dec 15, 3:55 PM CST | Severe Thunderstorm Warning | OAX | Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more | 80 min |
| Dec 15, 4:21 PM CST | Tornado Warning | OAX | Pottawattamie | 24 min |
| Dec 15, 4:30 PM CST | Tornado Warning | OAX | Mills, Montgomery, Pottawattamie | 30 min |
| Dec 15, 4:31 PM CST | Tornado Warning | OAX | Harrison, Monona, Shelby | 13 min |
| Dec 15, 4:37 PM CST | Tornado Warning | OAX | Harrison, Shelby | 23 min |
| Dec 15, 4:46 PM CST | Tornado Warning | OAX | Pottawattamie, Shelby | 20 min |
| Dec 15, 4:54 PM CST | Tornado Warning | OAX | Montgomery, Page | 15 min |
| Dec 15, 4:55 PM CST | Tornado Warning | OAX | Shelby | 14 min |
Nearby
Tornado Warnings in Iowa, 2021Tornado Warnings in Nebraska, 2021Every tornado warning in 2021Tornadoes 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.