Alert archive / Minnesota / Areal Flood Advisories in 2021
Areal Flood Advisory 11, NWS La Crosse, WI
NWS La Crosse, WI issued this areal flood advisory at Aug 7, 2021, 12:59 PM CDT for Buffalo County, Wisconsin; Olmsted County, Wabasha County, Winona County, Minnesota. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 7, 2021, 12:59 PM CDT (17:59 UTC)
- Expired
- Aug 7, 2021, 3:12 PM CDT
- In force
- 2 hr
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
Counties Olmsted County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI
The radar
The La Crosse radar (KARX), 78 km from the middle of the area, began a volume at 18:02 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.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 6.0 hours before the alert went out and 309 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
- 1645 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1006 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before this areal flood advisory went out at Aug 7, 12:04 PM CDT, 55 minutes earlier.
Area forecast discussion, Aug 7, 12:04 PM CDT, 55 minutes before
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</html>Hazardous weather outlook, Aug 7, 2:49 AM CDT, 10 hours 10 minutes before
Hazardous Weather Outlook National Weather Service La Crosse WI 249 AM CDT Sat Aug 7 2021 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-081200- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston- Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau- Adams-Vernon-Crawford-Richland-Grant- 249 AM CDT Sat Aug 7 2021 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Today and Tonight Periods of thunderstorms are likely through tonight with a few severe storms possible. The main hazards will be large hail, damaging winds and torrential rainfall. An isolated tornado is also possible. Localized flooding could occur if storms repeat over the same area. .DAYS TWO THROUGH SEVEN...Sunday through Friday Additional thunderstorms are expected Sunday into Sunday night. A few storms could produce strong winds and hail. Any storms also will be capable of producing torrential rainfall. Periodic thunderstorm chances will continue for most of next week. At this time it is too early to discern any severe weather threat. .SPOTTER INFORMATION STATEMENT... Spotter reports may be needed at times this weekend. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled.
In the hours before
Special weather statement, Aug 7, 11:14 AM CDT, 1 hour 45 minutes before
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</html>Local storm report, Aug 7, 11:42 AM CDT, 1 hour 17 minutes before
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</html>Special weather statement, Aug 7, 12:12 PM CDT, 47 minutes before
Special Weather Statement
National Weather Service La Crosse WI
1212 PM CDT Sat Aug 7 2021
MNZ079-071730-
Wabasha MN-
1212 PM CDT Sat Aug 7 2021
...A strong thunderstorm will impact portions of central Wabasha
County through 1230 PM CDT...
At 1211 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Elgin, or 15 miles southwest of Wabasha, moving
northeast at 35 mph.
HAZARD...Penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
West Albany, Bremen, Zumbro Falls, Millville, Hammond, Jarrett,
Zumbro Bottoms Campground, Conception, County Roads 18 And 4, County
Roads 33 And 4, Dumfries, Theilman, Kruger Campground and County
Roads 31 And 2.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4431 9244 4442 9212 4441 9211 4423 9201
4420 9239
TIME...MOT...LOC 1711Z 245DEG 29KT 4426 9232
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH
SkowSpecial weather statement, Aug 7, 12:19 PM CDT, 40 minutes before
Special Weather Statement
National Weather Service La Crosse WI
1219 PM CDT Sat Aug 7 2021
WIZ055-071745-
Richland WI-
1219 PM CDT Sat Aug 7 2021
...A strong thunderstorm will impact portions of central Richland
County through 1245 PM CDT...
At 1219 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles west of Richland Center, moving northeast at 25 mph.
HAZARD...Half inch hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Richland Center, Rockbridge, Sylvan, Boaz, Yuba, County Roads D And N
N, Sabin, Highways 58 And 154, Woodstock, Gillingham, Bloom City,
Neptune, Buck Creek, County Roads A And Z, Five Points, Bosstown,
County Roads Z Z And Q, Hub City, Highways 80 And 56 and Ash Ridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4337 9021 4329 9061 4342 9067 4355 9048
4355 9041
TIME...MOT...LOC 1719Z 237DEG 20KT 4338 9056
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...<30 MPH
SkowSpecial weather statement, Aug 7, 12:23 PM CDT, 36 minutes before
Special Weather Statement
National Weather Service La Crosse WI
1223 PM CDT Sat Aug 7 2021
MNZ087-088-071800-
Olmsted MN-Winona MN-
1223 PM CDT Sat Aug 7 2021
...A strong thunderstorm will impact portions of western Winona and
southeastern Olmsted Counties through 100 PM CDT...
At 1223 PM CDT, Doppler radar was tracking a strong thunderstorm near
Eyota, or 7 miles southeast of Rochester, moving east at 45 mph.
HAZARD...Penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Rochester, Stewartville, St. Charles, Eyota, Dover, Marion, Viola,
Elba, Chester, Whitewater State Park, and Predmore.
This includes Interstate 90 in Minnesota between mile markers 210 and
238.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4403 9248 4411 9217 4411 9208 4413 9208
4416 9197 4389 9197 4387 9249
TIME...MOT...LOC 1723Z 253DEG 38KT 4397 9234
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH
SkowThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:26 AM CDT | Special Weather Statement | ARX | Buffalo | 34 min |
| Aug 7, 7:40 AM CDT | Special Weather Statement | ARX | La Crosse | 35 min |
| Aug 7, 9:17 AM CDT | Special Weather Statement | ARX | Juneau | 28 min |
| Aug 7, 10:12 AM CDT | Special Weather Statement | ARX | Adams | 33 min |
| Aug 7, 11:17 AM CDT | Special Weather Statement | ARX | Crawford | 28 min |
| Aug 7, 11:24 AM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Vernon | 27 min |
| Aug 7, 11:26 AM CDT | Severe Thunderstorm Warning | ARX | Crawford, Richland, Vernon | 21 min |
| Aug 7, 12:19 PM CDT | Special Weather Statement | ARX | Richland | 26 min |
| Aug 7, 1:17 PM CDT | Severe Thunderstorm Warning | ARX | Richland, Vernon | 58 min |
| Aug 7, 1:48 PM CDT | Special Weather Statement | ARX | La Crosse | 27 min |
| Aug 7, 2:14 PM CDT | Special Weather Statement | ARX | La Crosse | 31 min |
| Aug 7, 2:23 PM CDT | Areal Flood Advisory | ARX | La Crosse, Trempealeau | 112 min |
| Aug 7, 3:02 PM CDT | River Flood Warning | ARX | Monroe, Vernon | 21 days |
| Aug 7, 3:02 PM CDT | River Flood Warning | ARX | Vernon | 4 days |
| Aug 7, 3:02 PM CDT | River Flood Warning | ARX | Richland, Vernon | 4 days |
| Aug 7, 3:02 PM CDT | River Flood Warning | ARX | Richland, Vernon | 61 hr |
| Aug 7, 3:02 PM CDT | River Flood Warning | ARX | Buffalo, Trempealeau | 19 hr |
| Aug 7, 3:07 PM CDT | Areal Flood Advisory | ARX | La Crosse | 74 min |
| Aug 7, 3:17 PM CDT | Special Weather Statement | ARX | Vernon | 73 min |
| Aug 7, 3:23 PM CDT | Flash Flood Warning | ARX | La Crosse, Monroe | 3 hr |
| Aug 7, 3:35 PM CDT | Severe Thunderstorm Warning | ARX | Vernon | 55 min |
| Aug 7, 3:52 PM CDT | Severe Thunderstorm Warning | ARX | Crawford | 38 min |
| Aug 7, 4:00 PM CDT | Tornado Warning | ARX | Crawford | 30 min |
| Aug 7, 4:05 PM CDT | Severe Thunderstorm Warning | ARX | Richland | 40 min |
| Aug 7, 4:19 PM CDT | Tornado Warning | ARX | Crawford, Grant | 41 min |
| Aug 7, 4:27 PM CDT | Flash Flood Warning | ARX | Vernon | 3 hr |
| Aug 7, 4:56 PM CDT | Tornado Warning | ARX | Grant | 19 min |
| Aug 7, 5:53 PM CDT | Severe Thunderstorm Warning | ARX | Juneau, Monroe, Vernon | 37 min |
| Aug 7, 6:18 PM CDT | Flash Flood Watch | ARX | Adams, Buffalo, Clark, Crawford, Jackson, Juneau and 5 more | 35 hr |
| Aug 7, 7:21 AM CDT | Special Weather Statement | ARX | Winona | 24 min |
| Aug 7, 10:29 AM CDT | Special Weather Statement | ARX | Olmsted | 31 min |
| Aug 7, 10:33 AM CDT | Severe Thunderstorm Warning | ARX | Dodge, Olmsted, Wabasha | 42 min |
| Aug 7, 11:14 AM CDT | Special Weather Statement | ARX | Wabasha | 31 min |
| Aug 7, 12:12 PM CDT | Special Weather Statement | ARX | Wabasha | 18 min |
| Aug 7, 12:23 PM CDT | Special Weather Statement | ARX | Olmsted | 37 min |
Nearby
Areal Flood Advisories in Minnesota, 2021Areal Flood Advisories in Wisconsin, 2021Every areal flood advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.