Alert archive / Iowa / Tornado Warnings in 2009
Tornado Warning 26, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Aug 19, 2009, 4:38 PM CDT for Clayton County, Fayette County, Iowa. It was in force for 52 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
- Aug 19, 2009, 4:38 PM CDT (21:38 UTC)
- Expired
- Aug 19, 2009, 5:30 PM CDT
- In force
- 52 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
Counties Clayton County, IA, Fayette County, IA
The radar
The La Crosse radar (KARX), 120 km from the middle of the area, began a volume at 21:39 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 19, 4:50 PM CDT | TORNADO | 2 E Stanley, IA | TORNADO STILL ON THE GROUND AT 100TH STREET AND QUINN AVENUE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.6 hours before the alert went out and 167 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
- 74 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KARX 192138 TORARX IAC043-065-192230- /O.NEW.KARX.TO.W.0026.090819T2138Z-090819T2230Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 438 PM CDT WED AUG 19 2009 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * TORNADO WARNING FOR... WESTERN CLAYTON COUNTY IN NORTHEAST IOWA... EASTERN FAYETTE COUNTY IN NORTHEAST IOWA... * UNTIL 530 PM CDT * AT 436 PM CDT...DOPPLER RADAR AND STORM SPOTTERS INDICATED A TORNADO 4 MILES SOUTH OF COUNTY ROADS 3 AND W 33...OR 6 MILES SOUTHEAST OF OELWEIN...MOVING NORTHEAST AT 15 MPH. A TORNADO WAS REPORTED ON THE GROUND SOUTH OF STANLEY. * THE TORNADO WILL BE NEAR... MAYNARD AROUND 500 PM... HIGHWAYS 3 AND 187 AND JOY SPRINGS COUNTY PARK AROUND 515 PM... ARLINGTON AROUND 525 PM... WEST UNION AND VOLGA AROUND 530 PM... IF STORMS APPROACH YOU IN FAYETTE COUNTY...SEEK SHELTER. MANY STORMS HAVE PRODUCED TORNADOES TODAY. SEEK SHELTER PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS && LAT...LON 4264 9191 4308 9181 4308 9136 4264 9161 TIME...MOT...LOC 2137Z 220DEG 11KT 4263 9181 $$ BAUMGARDT
2 follow-up statements
000 WWUS53 KARX 192210 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 510 PM CDT WED AUG 19 2009 IAC043-065-192230- /O.CON.KARX.TO.W.0026.000000T0000Z-090819T2230Z/ FAYETTE IA-CLAYTON IA- 510 PM CDT WED AUG 19 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR WESTERN CLAYTON AND EASTERN FAYETTE COUNTIES... AT 455 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO ON THE GROUND 3 MILES EAST-SOUTHEAST OF STANLEY...OR 11 MILES EAST OF OELWEIN...MOVING NORTHEAST AT 15 MPH. THEY ALSO REPORTED THE TORNADO LIFTED AT 510 PM BUT DAMAGE WAS REPORTED. THIS STORM COULD PRODUCE ANOTHER TORNADO AT ANY TIME. AT 510 PM...THIS STORM WAS LOCATED NEAR JOY SPRINGS COUNTY PARK...OR 15 MILES NORTHWEST OF MANCHESTER...MOVING EAST AT 20 MPH. * THE TORNADO WILL BE NEAR... THOMASVILLE AROUND 515 PM... ELGIN AND CLERMONT AROUND 520 PM... VOLGA AROUND 525 PM... MONONA AND HIGHWAY 56 AND COUNTY W 70 AROUND 530 PM... PRECAUTIONARY/PREPAREDNESS ACTIONS... CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A STURDY BUILDING. AS A LAST RESORT...LAY FLAT IN A DITCH AND COVER YOUR HEAD. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT THURSDAY MORNING FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN. && LAT...LON 4264 9182 4308 9162 4308 9136 4264 9161 TIME...MOT...LOC 2209Z 256DEG 17KT 4267 9161 $$ BAUMGARDT
000 WWUS53 KARX 192228 SVSARX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 528 PM CDT WED AUG 19 2009 IAC065-192237- /O.CAN.KARX.TO.W.0026.000000T0000Z-090819T2230Z/ FAYETTE IA- 528 PM CDT WED AUG 19 2009 ...THE TORNADO WARNING FOR EASTERN FAYETTE COUNTY IS CANCELLED... THE THUNDERSTORM HAS SHIFTED EAST OF THE COUNTY. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY MORNING FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN. LAT...LON 4308 9161 4308 9136 4289 9152 4290 9161 TIME...MOT...LOC 2227Z 215DEG 19KT 4296 9154 $$ IAC043-192230- /O.CON.KARX.TO.W.0026.000000T0000Z-090819T2230Z/ CLAYTON IA- 528 PM CDT WED AUG 19 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR NORTHWESTERN CLAYTON COUNTY... AT 526 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM AND TORNADO WAS LOCATED NEAR GUNDER...OR 10 MILES NORTHWEST OF ELKADER...MOVING NORTHEAST AT 20 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT THURSDAY MORNING FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND WESTERN WISCONSIN. && LAT...LON 4308 9161 4308 9136 4289 9152 4290 9161 TIME...MOT...LOC 2227Z 215DEG 19KT 4296 9154 $$ BAUMGARDT
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 3:33 PM CDT | Tornado Warning | ARX | Fayette | 42 min |
| Aug 19, 3:43 PM CDT | Tornado Warning | ARX | Winneshiek | 62 min |
| Aug 19, 4:15 PM CDT | Tornado Warning | ARX | Fayette | 30 min |
| Aug 19, 4:26 PM CDT | Tornado Warning | ARX | Allamakee | 49 min |
| Aug 19, 5:20 PM CDT | Tornado Warning | ARX | Allamakee | 31 min |
| Aug 19, 5:59 PM CDT | Areal Flood Advisory | ARX | Allamakee | 47 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.