Alert archive / Iowa / Tornado Warnings in 2009
Tornado Warning 8, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Jun 17, 2009, 8:10 PM CDT for Chickasaw County, Floyd County, Iowa. It was in force for 50 min. 2 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 17, 2009, 8:10 PM CDT (01:10 UTC)
- Expired
- Jun 17, 2009, 9:00 PM CDT
- In force
- 50 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
Counties Chickasaw County, IA, Floyd County, IA
The radar
The La Crosse radar (KARX), 140 km from the middle of the area, began a volume at 01:09 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 17, 8:11 PM CDT | TORNADO | 4 Nw Nashua, IA | |
| Jun 17, 8:25 PM CDT | TORNADO | 4 Nw Nashua, IA |
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 17, 7:01 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.2 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
- 1471 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 751 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 219 m²/s²
- 0-3 km storm-relative helicity
- 350 m²/s²
- Significant tornado parameter
- 1.8
- Supercell composite
- 12.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS53 KARX 180110
TORARX
IAC037-067-180200-
/O.NEW.KARX.TO.W.0008.090618T0110Z-090618T0200Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
810 PM CDT WED JUN 17 2009
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* TORNADO WARNING FOR...
EAST CENTRAL FLOYD COUNTY IN NORTH CENTRAL IOWA...
SOUTHWESTERN CHICKASAW COUNTY IN NORTHEAST IOWA...
* UNTIL 900 PM CDT
* AT 805 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO NEAR CHARLES CITY...MOVING EAST AT 15 MPH.
* THE TORNADO WILL BE NEAR...
CARRVILLE AND MIDWAY AROUND 820 PM...
BUNNS WOODS COUNTY PARK AROUND 825 PM...
BASSETT AND HOWARDS WOOD RECREATIONAL AREA AROUND 830 PM...
CHICKASAW AROUND 840 PM...
IONIA AROUND 845 PM...
HIGHWAY 18 AND COUNTY V 18 AROUND 850 PM...
NEW HAMPTON AND TWIN PONDS PARK AROUND 900 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR
AND STAY AWAY FROM WINDOWS
&&
LAT...LON 4314 9264 4306 9225 4291 9248 4291 9253
4307 9272
TIME...MOT...LOC 0109Z 289DEG 12KT 4307 9263
$$
AJ2 follow-up statements
000
WWUS53 KARX 180127
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
827 PM CDT WED JUN 17 2009
IAC037-067-180200-
/O.CON.KARX.TO.W.0008.000000T0000Z-090618T0200Z/
FLOYD IA-CHICKASAW IA-
827 PM CDT WED JUN 17 2009
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
SOUTHWESTERN CHICKASAW AND EAST CENTRAL FLOYD COUNTIES...
AT 811 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO 4 MILES
NORTHWEST OF NASHUA. AT 825 PM CDT...THIS TORNADO WAS NOW LOCATED
NEAR BUNNS WOODS COUNTY PARK...OR 7 MILES SOUTHEAST OF CHARLES
CITY...MOVING SOUTHEAST AT 15 MPH.
* THE TORNADO WILL BE NEAR...
CHICKASAW AROUND 830 PM...
RIVER RANCH CAMPGROUND AROUND 835 PM...
IONIA AND HIGHWAY 18 AND COUNTY V 18 AROUND 840 PM...
TWIN PONDS PARK AROUND 855 PM...
NEW HAMPTON AROUND 900 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR
AND STAY AWAY FROM WINDOWS
&&
LAT...LON 4304 9265 4312 9259 4306 9225 4291 9248
4291 9253
TIME...MOT...LOC 0125Z 295DEG 14KT 4302 9254
$$
AJ000
WWUS53 KARX 180149
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
849 PM CDT WED JUN 17 2009
IAC067-180158-
/O.CAN.KARX.TO.W.0008.000000T0000Z-090618T0200Z/
FLOYD IA-
849 PM CDT WED JUN 17 2009
...THE TORNADO WARNING FOR EAST CENTRAL FLOYD COUNTY IS CANCELLED...
TO CALL YOUR SEVERE WEATHER REPORT DIRECTLY INTO THE NATIONAL WEATHER
SERVICE DIAL 6 0 8 7 8 2 1 8 9 4.
LAT...LON 4298 9252 4303 9255 4309 9251 4306 9225
4291 9248
TIME...MOT...LOC 0148Z 290DEG 12KT 4301 9245
$$
IAC037-180200-
/O.CON.KARX.TO.W.0008.000000T0000Z-090618T0200Z/
CHICKASAW IA-
849 PM CDT WED JUN 17 2009
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
SOUTHWESTERN CHICKASAW COUNTY...
AT 847 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR IONIA...OR 8 MILES
SOUTHWEST OF NEW HAMPTON...MOVING EAST AT 15 MPH. THE STORM PREVIOUS
PRODUCED A TORNADO 4 MILES NORTHWEST OF NASHUA AT 825 PM CDT.
* THE TORNADO WILL BE NEAR...
NEW HAMPTON AND TWIN PONDS PARK AROUND 900 PM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A STURDY BUILDING. AS A
LAST RESORT...LAY FLAT IN A DITCH AND COVER YOUR HEAD.
&&
LAT...LON 4298 9252 4303 9255 4309 9251 4306 9225
4291 9248
TIME...MOT...LOC 0148Z 290DEG 12KT 4301 9245
$$
AJThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 7:25 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Mitchell | 65 min |
| Jun 17, 7:28 PM CDT | Tornado Warning | ARX | Floyd | 47 min |
| Jun 17, 8:29 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Winneshiek | 46 min |
| Jun 17, 8:52 PM CDT | Tornado Warning | ARX | Howard, Mitchell | 53 min |
| Jun 17, 8:59 PM CDT | Tornado Warning | ARX | Chickasaw | 46 min |
| Jun 17, 9:29 PM CDT | Flash Flood Warning | ARX | Chickasaw | 3 hr |
| Jun 17, 9:47 PM CDT | Severe Thunderstorm Warning | ARX | Howard | 45 min |
| Jun 17, 9:50 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Fayette | 25 min |
| Jun 17, 10:49 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard, Winneshiek | 56 min |
| Jun 17, 11:31 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Fayette, Winneshiek | 57 min |
| Jun 18, 12:12 AM CDT | Severe Thunderstorm Warning | ARX | Fayette | 34 min |
Nearby
Tornado Warnings in Iowa, 2009Every tornado warning in 2009Tornadoes in 2009
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.