Alert archive / Wisconsin / Flash Flood Warnings in 2024
Flash Flood Warning 11, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Aug 29, 2024, 5:57 PM CDT for Polk County, Wisconsin. It was in force for 2 hr. 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
- Aug 29, 2024, 5:57 PM CDT (22:57 UTC)
- Expired
- Aug 29, 2024, 8:12 PM CDT
- In force
- 2 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
County Polk County, WI
The radar
The Minneapolis radar (KMPX), 97 km from the middle of the area, began a volume at 22:58 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 29, 6:18 PM CDT | RAIN 2.2 | 2 W Amery, WI | |
| Aug 29, 6:50 PM CDT | FLASH FLOOD | 1 Wsw Amery, WI | 4-5 inches of standing water in the city of Amery reported by Co Dispatch. Time estimated via radar. |
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, 11.0 hours before the alert went out and 99 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
- 832 J/kg
- Mixed-layer CIN
- -148 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 242 m²/s²
- 0-3 km storm-relative helicity
- 296 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.9
The text
As transmitted.
257
WGUS53 KMPX 292257
FFWMPX
WIC095-300300-
/O.NEW.KMPX.FF.W.0011.240829T2257Z-240830T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
557 PM CDT Thu Aug 29 2024
The National Weather Service in the Twin Cities has issued a
* Flash Flood Warning for...
South Central Polk County in northwestern Wisconsin...
* Until 1000 PM CDT.
* At 557 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 inches of rain
have fallen. The expected rainfall rate is 1.5 to 2.5 inches in 1
hour. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4541 9234 4537 9232 4529 9238 4523 9246
4521 9251 4521 9254 4521 9255 4521 9256
4521 9257 4521 9271 4527 9268 4532 9262
4539 9252 4543 9241
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.5-2.5 INCHES IN 1 HOUR
$$
Borghoff2 follow-up statements
744
WGUS73 KMPX 300012
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
712 PM CDT Thu Aug 29 2024
WIC095-300300-
/O.CON.KMPX.FF.W.0011.000000T0000Z-240830T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Polk WI-
712 PM CDT Thu Aug 29 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING FOR SOUTH CENTRAL POLK COUNTY...
At 712 PM CDT, Doppler radar indicated thunderstorms produced heavy
rain across the warned area. Between 3 and 4 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4541 9234 4537 9232 4529 9238 4523 9246
4521 9251 4521 9254 4521 9255 4521 9256
4521 9257 4521 9271 4527 9268 4532 9262
4539 9252 4543 9241
FLASH FLOOD...RADAR INDICATED
$$
Borghoff916
WGUS73 KMPX 300112
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
812 PM CDT Thu Aug 29 2024
WIC095-300122-
/O.CAN.KMPX.FF.W.0011.000000T0000Z-240830T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Polk WI-
812 PM CDT Thu Aug 29 2024
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTH CENTRAL POLK COUNTY...
The heavy rain has ended. Flash Flooding is no longer expected to
pose a threat. Please continue to heed remaining road closures.
&&
LAT...LON 4541 9234 4537 9232 4529 9238 4523 9246
4521 9251 4521 9254 4521 9255 4521 9256
4521 9257 4521 9271 4527 9268 4532 9262
4539 9252 4543 9241
$$
DunleavyThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 4:53 PM CDT | Tornado Warning | MPX | Polk | 20 min |
| Aug 29, 4:58 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 32 min |
| Aug 29, 5:19 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Polk | 29 min |
| Aug 29, 5:57 PM CDT | Tornado Warning | MPX | Pierce, Saint Croix | 33 min |
| Aug 29, 6:21 PM CDT | Tornado Warning | MPX | Dunn, Saint Croix | 39 min |
| Aug 29, 6:49 PM CDT | Tornado Warning | MPX | Chippewa, Dunn | 27 min |
Nearby
Flash Flood Warnings in Wisconsin, 2024Every flash flood warning in 2024
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.