Alert archive / Iowa / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 95, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Sep 2, 2011, 6:15 AM CDT for Howard County, Winneshiek County, Iowa; Fillmore County, Minnesota. It was in force for 60 min. 5 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
- Sep 2, 2011, 6:15 AM CDT (11:15 UTC)
- Expired
- Sep 2, 2011, 7:15 AM CDT
- In force
- 60 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Howard County, IA, Winneshiek County, IA, Fillmore County, MN
The radar
The La Crosse radar (KARX), 92 km from the middle of the area, began a volume at 11:16 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 2, 6:24 AM CDT | TSTM WND DMG | Chester, IA | SEVERAL POWER LINES DOWN |
| Sep 2, 6:30 AM CDT | TSTM WND GST 70 | Chester, IA | POWERLINES DOWN SOUTHSIDE OF CHESTER. |
| Sep 2, 6:35 AM CDT | TSTM WND DMG | Cresco, IA | SEMI TRUCK BLOWN OVER ON HIGHWAY 9. REPORTED VIA KCRG TELEVISION. TIME ESTIMATED. |
| Sep 2, 6:35 AM CDT | TSTM WND DMG | Spring Valley, MN | LARGE BRANCHES DOWN IN TOWN AND ONE TREE DOWN OVER COUNTY ROAD 1. |
| Sep 2, 7:00 AM CDT | TSTM WND GST 60 | 2 Ne Newburg, MN | SEVERAL BRANCHES DOWN. OUTSIDE FURNITURE BLOWN AROUND. |
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 |
|---|---|---|---|
| Sep 2, 3:48 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 11.3 hours before the alert went out and 180 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
- 2071 J/kg
- Mixed-layer CIN
- -349 J/kg
- Mixed-layer LCL
- 1469 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
491
WUUS53 KARX 021115
SVRARX
IAC089-191-MNC045-021215-
/O.NEW.KARX.SV.W.0095.110902T1115Z-110902T1215Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
615 AM CDT FRI SEP 2 2011
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
HOWARD COUNTY IN NORTHEAST IOWA...
NORTHWESTERN WINNESHIEK COUNTY IN NORTHEAST IOWA...
FILLMORE COUNTY IN SOUTHEAST MINNESOTA...
* UNTIL 715 AM CDT
* AT 611 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR SARATOGA...OR 16 MILES EAST OF
OSAGE...MOVING EAST AT 60 MPH. THIS STORM CAN PRODUCE QUARTER SIZE
HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
DAVIS CORNERS AND CHESTER AROUND 620 AM...
LIME SPRINGS AND SPRING VALLEY AROUND 625 AM...
CRESCO AND WYKOFF AROUND 630 AM...
GRANGER AND HARVEST FARM CAMPGROUND AROUND 635 AM...
PRESTON AND HARMONY AROUND 640 AM...
CANTON AND LANESBORO AROUND 645 AM...
MABEL AROUND 650 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4350 9250 4350 9245 4383 9245 4384 9174
4335 9173 4326 9254
TIME...MOT...LOC 1115Z 248DEG 51KT 4338 9245
WIND...HAIL 60MPH 1.00IN
$$3 follow-up statements
108
WWUS53 KARX 021133
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
633 AM CDT FRI SEP 2 2011
IAC089-191-MNC045-021215-
/O.CON.KARX.SV.W.0095.000000T0000Z-110902T1215Z/
HOWARD IA-WINNESHIEK IA-FILLMORE MN-
633 AM CDT FRI SEP 2 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR FILLMORE...
NORTHWESTERN WINNESHIEK AND HOWARD COUNTIES UNTIL 715 AM CDT...
AT 630 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR COUNTY ROADS A 23 AND V 58...OR 6
MILES NORTHWEST OF CRESCO...MOVING EAST AT 60 MPH. THIS STORM CAN
PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
PRESTON AND HARMONY AROUND 640 AM...
CANTON AND LANESBORO AROUND 645 AM...
MABEL AND NEWBURG AROUND 650 AM...
CHOICE AND BRATSBERG AROUND 655 AM...
RUSHFORD AROUND 700 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM FRIDAY
MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND
SOUTHWESTERN WISCONSIN.
&&
LAT...LON 4350 9250 4350 9245 4383 9245 4384 9174
4335 9173 4326 9251
TIME...MOT...LOC 1133Z 248DEG 51KT 4347 9212
WIND...HAIL 60MPH 1.00IN
$$
04213
WWUS53 KARX 021145
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
645 AM CDT FRI SEP 2 2011
IAC089-191-MNC045-021215-
/O.CON.KARX.SV.W.0095.000000T0000Z-110902T1215Z/
HOWARD IA-WINNESHIEK IA-FILLMORE MN-
645 AM CDT FRI SEP 2 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR FILLMORE...
NORTHWESTERN WINNESHIEK AND EASTERN HOWARD COUNTIES UNTIL 715 AM
CDT...
AT 642 AM THE CHESTER FIRE CHIEF REPORTED POWER LINES DOWN IN
CHESTER WITH A SEVERE THUNDERSTORM.
AT 639 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
SEVERE THUNDERSTORM WAS LOCATED NEAR HARVEST FARM CAMPGROUND...OR 9
MILES NORTHEAST OF CRESCO...MOVING EAST AT 55 MPH. THIS STORM CAN
PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
LANESBORO AND NEWBURG AROUND 650 AM...
MABEL AND TAWNEY AROUND 655 AM...
RUSHFORD AND BRATSBERG AROUND 700 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM FRIDAY
MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND
SOUTHWESTERN WISCONSIN.
&&
LAT...LON 4328 9233 4350 9234 4383 9234 4384 9174
4335 9173
TIME...MOT...LOC 1143Z 248DEG 49KT 4351 9197
WIND...HAIL 60MPH 1.00IN
$$
04917
WWUS53 KARX 021155
SVSARX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
655 AM CDT FRI SEP 2 2011
IAC089-191-MNC045-021215-
/O.CON.KARX.SV.W.0095.000000T0000Z-110902T1215Z/
HOWARD IA-WINNESHIEK IA-FILLMORE MN-
655 AM CDT FRI SEP 2 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
FILLMORE...NORTHWESTERN WINNESHIEK AND NORTHEASTERN HOWARD COUNTIES
UNTIL 715 AM CDT...
AT 652 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM LOCATED NEAR NEWBURG...OR 15 MILES SOUTHEAST OF
PRESTON...MOVING EAST AT 50 MPH. THIS STORM CAN PRODUCE QUARTER SIZE
HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
BRATSBERG AROUND 700 AM...
RUSHFORD AND RUSHFORD VILLAGE AROUND 705 AM...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE
AND STAY AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM FRIDAY
MORNING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND
SOUTHWESTERN WISCONSIN.
&&
LAT...LON 4331 9208 4351 9212 4383 9208 4384 9174
4335 9173
TIME...MOT...LOC 1155Z 248DEG 43KT 4356 9179
WIND...HAIL 60MPH 1.00IN
$$
04The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 5:46 AM CDT | Severe Thunderstorm Warning | ARX | Mitchell | 44 min |
| Sep 2, 7:02 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Winneshiek | 58 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2011Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011
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.