Alert archive / Iowa / Tornado Warnings in 2021
Tornado Warning 15, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Aug 27, 2021, 6:45 PM CDT for Chickasaw County, Fayette County, Iowa. It was in force for 45 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
- Aug 27, 2021, 6:45 PM CDT (23:45 UTC)
- Expired
- Aug 27, 2021, 7:30 PM CDT
- In force
- 45 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 1.0 in
Counties Chickasaw County, IA, Fayette County, IA
The radar
The La Crosse radar (KARX), 126 km from the middle of the area, began a volume at 23:44 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 |
|---|---|---|---|
| Aug 27, 5:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.8 hours before the alert went out and 201 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
- 358 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
237
WFUS53 KARX 272345
TORARX
IAC037-065-280030-
/O.NEW.KARX.TO.W.0015.210827T2345Z-210828T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
645 PM CDT Fri Aug 27 2021
The National Weather Service in La Crosse has issued a
* Tornado Warning for...
Northwestern Fayette County in northeastern Iowa...
Southern Chickasaw County in northeastern Iowa...
* Until 730 PM CDT.
* At 644 PM CDT, a confirmed tornado was located near Ionia, or 8
miles southwest of New Hampton, moving east at 30 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Weather spotters confirmed multiple brief tornadoes.
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.
* The tornado will be near...
Fredericksburg around 705 PM CDT.
Waucoma around 725 PM CDT.
Other locations impacted by this tornadic thunderstorm include County
Roads B 54 And V 56, Twin Ponds Park, Waucoma Campground, Boyd,
Alpha, Williamstown and Richfield.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. 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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4290 9208 4291 9208 4291 9248 4301 9249
4307 9197 4290 9197
TIME...MOT...LOC 2344Z 270DEG 28KT 4296 9242
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
Skow3 follow-up statements
648
WWUS53 KARX 280003
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
703 PM CDT Fri Aug 27 2021
IAC037-065-280030-
/O.CON.KARX.TO.W.0015.000000T0000Z-210828T0030Z/
Fayette IA-Chickasaw IA-
703 PM CDT Fri Aug 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHWESTERN FAYETTE AND SOUTHEASTERN CHICKASAW COUNTIES...
At 703 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fredericksburg, or near New Hampton, moving east at
30 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Fredericksburg around 715 PM CDT.
Other locations impacted by this tornadic thunderstorm include County
Roads B 54 And V 56, Twin Ponds Park, Boyd, Alpha, Williamstown,
Richfield and Highway 18 And County V 56.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4290 9208 4291 9208 4291 9239 4302 9241
4302 9239 4305 9197 4290 9197
TIME...MOT...LOC 0003Z 269DEG 24KT 4296 9229
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Skow113
WWUS53 KARX 280017
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
717 PM CDT Fri Aug 27 2021
IAC037-065-280030-
/O.CON.KARX.TO.W.0015.000000T0000Z-210828T0030Z/
Fayette IA-Chickasaw IA-
717 PM CDT Fri Aug 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHWESTERN FAYETTE AND SOUTHEASTERN CHICKASAW COUNTIES...
At 716 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Fredericksburg, or 11 miles southeast of New
Hampton, moving east at 30 mph.
HAZARD...Tornado and quarter size hail.
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
northwestern Fayette and southeastern Chickasaw Counties, including
the following locations... Alpha, County Roads B 54 And V 56,
Richfield and Highway 18 And County V 56.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4290 9208 4291 9208 4291 9221 4303 9226
4305 9197 4290 9197
TIME...MOT...LOC 0016Z 270DEG 28KT 4296 9214
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Skow701
WWUS53 KARX 280026
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
726 PM CDT Fri Aug 27 2021
IAC037-065-280036-
/O.EXP.KARX.TO.W.0015.000000T0000Z-210828T0030Z/
Fayette IA-Chickasaw IA-
726 PM CDT Fri Aug 27 2021
...THE TORNADO WARNING FOR NORTHWESTERN FAYETTE AND SOUTHEASTERN
CHICKASAW COUNTIES WILL EXPIRE AT 730 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
A Tornado Watch remains in effect until 1100 PM CDT for northeastern
Iowa.
LAT...LON 4290 9208 4291 9208 4291 9221 4303 9226
4305 9197 4290 9197
TIME...MOT...LOC 0025Z 270DEG 28KT 4296 9205
$$
SkowThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 1:51 AM CDT | Flash Flood Warning | ARX | Howard, Mitchell | 4 hr |
| Aug 27, 3:33 AM CDT | Flash Flood Warning | ARX | Howard, Mitchell, Winneshiek | 4 hr |
| Aug 27, 9:42 AM CDT | River Flood Warning | ARX | Winneshiek | 60 hr |
| Aug 27, 3:24 PM CDT | Special Weather Statement | ARX | Howard, Mitchell | 51 min |
| Aug 27, 5:34 PM CDT | Tornado Warning | ARX | Floyd | 41 min |
| Aug 27, 6:09 PM CDT | Tornado Warning | ARX | Chickasaw, Floyd | 51 min |
| Aug 27, 6:52 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Fayette, Winneshiek | 38 min |
Nearby
Tornado Warnings in Iowa, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.