Alert archive / Iowa / Tornado Warnings in 2021
Tornado Warning 14, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Aug 27, 2021, 6:09 PM CDT for Chickasaw County, Floyd County, Iowa. It was in force for 51 min. 3 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
- Aug 27, 2021, 6:09 PM CDT (23:09 UTC)
- Expired
- Aug 27, 2021, 7:00 PM CDT
- In force
- 51 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 1.0 in
Counties Chickasaw County, IA, Floyd County, IA
The radar
The La Crosse radar (KARX), 150 km from the middle of the area, began a volume at 23:08 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 |
|---|---|---|---|
| Aug 27, 6:10 PM CDT | TORNADO | 2 Se Marble Rock, IA | LARGE ABOVE GROUND PROPANE TANKS WERE KNOCKED OVER BY A TORNADO. |
| Aug 27, 6:36 PM CDT | TSTM WND DMG | 1 Ese Nashua, IA | DAMAGE TO CORN AND TELEPHONE POLES. |
| Aug 27, 6:37 PM CDT | FUNNEL CLOUD | 5 Sse Ionia, IA | POSSIBLY TOUCHING DOWN, UNSURE. |
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 |
|---|---|---|---|
| Aug 27, 5:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 221 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
- 487 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 644 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- -16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
003
WFUS53 KARX 272309
TORARX
IAC037-067-280000-
/O.NEW.KARX.TO.W.0014.210827T2309Z-210828T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
609 PM CDT Fri Aug 27 2021
The National Weather Service in La Crosse has issued a
* Tornado Warning for...
Southeastern Floyd County in north central Iowa...
Southwestern Chickasaw County in northeastern Iowa...
* Until 700 PM CDT.
* At 608 PM CDT, a confirmed tornado was located east of Marble
Rock, or 8 miles southwest of Charles City, moving east at 30 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Weather spotters confirmed tornado.
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...
Nashua around 635 PM CDT.
Ionia around 640 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Howards Wood Recreational Area, Bradford, Chickasaw, Oakwood,
Powersville, Carrville and Republic.
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 4301 9285 4308 9237 4291 9234 4291 9284
TIME...MOT...LOC 2308Z 265DEG 27KT 4296 9278
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
Skow3 follow-up statements
456
WWUS53 KARX 272321
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
621 PM CDT Fri Aug 27 2021
IAC037-067-280000-
/O.CON.KARX.TO.W.0014.000000T0000Z-210828T0000Z/
Floyd IA-Chickasaw IA-
621 PM CDT Fri Aug 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHEASTERN FLOYD AND SOUTHWESTERN CHICKASAW COUNTIES...
At 621 PM CDT, a confirmed tornado was located near Nashua, or 7
miles south of Charles City, moving east at 30 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Weather spotters confirmed multiple brief tornadoes.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near...
Nashua around 635 PM CDT.
Ionia around 640 PM CDT.
Other locations impacted by this tornadic thunderstorm include
Highway 18 And County V 18, Twin Ponds Park, River Ranch Campground,
Howards Wood Recreational Area, Bunns Woods County Park, Bradford and
Chickasaw.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4301 9280 4308 9237 4291 9234 4291 9277
TIME...MOT...LOC 2321Z 266DEG 27KT 4295 9265
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
Skow722
WWUS53 KARX 272335
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
635 PM CDT Fri Aug 27 2021
IAC037-067-280000-
/O.CON.KARX.TO.W.0014.000000T0000Z-210828T0000Z/
Floyd IA-Chickasaw IA-
635 PM CDT Fri Aug 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHEASTERN FLOYD AND SOUTHWESTERN CHICKASAW COUNTIES...
At 634 PM CDT, a confirmed tornado was located over Nashua, or 9
miles southeast of Charles City, 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.
This tornado will be near...
Ionia around 645 PM CDT.
Other locations impacted by this tornadic thunderstorm include Twin
Ponds Park, River Ranch Campground, Midway, Howards Wood Recreational
Area, Bradford and Republic.
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 4301 9262 4305 9236 4291 9234 4291 9260
TIME...MOT...LOC 2334Z 263DEG 25KT 4296 9254
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
Skow824
WWUS53 KARX 272346
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
646 PM CDT Fri Aug 27 2021
IAC067-272356-
/O.CAN.KARX.TO.W.0014.000000T0000Z-210828T0000Z/
Floyd IA-
646 PM CDT Fri Aug 27 2021
...THE TORNADO WARNING FOR SOUTHEASTERN FLOYD COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM CDT for northeastern
Iowa.
LAT...LON 4301 9252 4303 9236 4291 9234 4291 9252
TIME...MOT...LOC 2346Z 265DEG 27KT 4297 9242
$$
IAC037-280000-
/O.CON.KARX.TO.W.0014.000000T0000Z-210828T0000Z/
Chickasaw IA-
646 PM CDT Fri Aug 27 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHWESTERN CHICKASAW COUNTY...
At 646 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.
This tornadic thunderstorm will remain over mainly rural areas of
southwestern Chickasaw County, including the following locations...
Twin Ponds Park, River Ranch Campground, Bradford and Republic.
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 4301 9252 4303 9236 4291 9234 4291 9252
TIME...MOT...LOC 2346Z 265DEG 27KT 4297 9242
TORNADO...OBSERVED
MAX HAIL SIZE...1.00 IN
$$
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, 6:45 PM CDT | Tornado Warning | ARX | Chickasaw, Fayette | 45 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.