Alert archive / Iowa / Tornado Warnings in 2016
Tornado Warning 12, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Sep 21, 2016, 6:18 PM CDT for Floyd County, Iowa. It was in force for 42 min. 1 report 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
- Sep 21, 2016, 6:18 PM CDT (23:18 UTC)
- Expired
- Sep 21, 2016, 7:00 PM CDT
- In force
- 42 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
County Floyd County, IA
The radar
The Des Moines radar (KDMX), 155 km from the middle of the area, began a volume at 23:17 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 |
|---|---|---|---|
| Sep 21, 6:20 PM CDT | TSTM WND DMG | 2 Se Marble Rock, IA | 2 TO 3 MACHINE SHEDS DESTROYED. RELAYED BY CHARLES CITY FD FROM MARBLE ROCK FD . |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 218 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
- 515 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.5
The text
As transmitted.
666
WFUS53 KARX 212318
TORARX
IAC067-220000-
/O.NEW.KARX.TO.W.0012.160921T2318Z-160922T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
618 PM CDT WED SEP 21 2016
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHWESTERN FLOYD COUNTY IN NORTH CENTRAL IOWA...
* UNTIL 700 PM CDT
* AT 617 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED 2 MILES SOUTH OF MARBLE ROCK...OR 11 MILES
NORTH OF ALLISON...MOVING EAST AT 15 MPH.
HAZARD...TORNADO AND PING PONG BALL 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
SOUTHWESTERN FLOYD COUNTY...INCLUDING THE FOLLOWING LOCATIONS:
HIGHWAY 14 AND COUNTY ROAD B 60 AND POWERSVILLE.
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.
&&
LAT...LON 4300 9296 4301 9268 4291 9267 4291 9297
TIME...MOT...LOC 2317Z 273DEG 11KT 4291 9287
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
AJ1 follow-up statement
912
WWUS53 KARX 212333 RRA
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
633 PM CDT WED SEP 21 2016
IAC067-220000-
/O.CON.KARX.TO.W.0012.000000T0000Z-160922T0000Z/
FLOYD IA-
633 PM CDT WED SEP 21 2016
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHWESTERN FLOYD COUNTY...
AT 632 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR GREENE...OR 10 MILES SOUTH OF CHARLES CITY...MOVING
EAST AT 30 MPH.
HAZARD...TORNADO AND PING PONG BALL SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR. TREE DAMAGE
IS LIKELY.
LOCATIONS IMPACTED INCLUDE...
MARBLE ROCK...HIGHWAY 14 AND COUNTY ROAD B 60 AND POWERSVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW!
&&
LAT...LON 4300 9293 4301 9268 4291 9267 4291 9294
TIME...MOT...LOC 2332Z 264DEG 25KT 4292 9273
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
AJThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 6:44 AM CDT | Flash Flood Warning | ARX | Allamakee | 6 hr |
| Sep 21, 4:09 PM CDT | Special Weather Statement | ARX | Floyd | 51 min |
| Sep 21, 4:21 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 39 min |
| Sep 21, 4:47 PM CDT | Flash Flood Warning | ARX | Floyd | 4 hr |
| Sep 21, 5:03 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 57 min |
| Sep 21, 5:20 PM CDT | Tornado Warning | ARX | Floyd | 40 min |
| Sep 21, 5:52 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 35 min |
| Sep 21, 6:01 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 44 min |
| Sep 21, 6:03 PM CDT | Flash Flood Warning | ARX | Floyd | 3 hr |
| Sep 21, 6:23 PM CDT | Flash Flood Warning | ARX | Mitchell | 6 hr |
| Sep 21, 6:53 PM CDT | Tornado Warning | ARX | Chickasaw, Floyd | 32 min |
Nearby
Tornado Warnings in Iowa, 2016Every tornado warning in 2016Tornadoes in 2016
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.