Alert archive / Wisconsin / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Aug 7, 2021, 6:17 PM CDT for Chippewa County, Dunn County, Eau Claire County, Wisconsin. It was in force for 4 hr. 3 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 7, 2021, 6:17 PM CDT (23:17 UTC)
- Expired
- Aug 7, 2021, 10:15 PM CDT
- In force
- 4 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Chippewa County, WI, Dunn County, WI, Eau Claire County, WI
The radar
The La Crosse radar (KARX), 117 km from the middle of the area, began a volume at 23:16 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 |
|---|---|---|---|
| Aug 7, 7:25 PM CDT | FLASH FLOOD | 3 Ne Eau Claire, WI | WATER 1 TO 2 FEET DEEP AT THE INTERSECTION OF EDDY LANE AND ABBIE HILL DR. A FEW CARS STALLED OUT. |
| Aug 7, 8:00 PM CDT | HEAVY RAIN 5.26 | 3 Ne Eau Claire, WI | 5.26 INCHES TODAY AS OF 8 PM. 4.01 INCHES FELL BETWEEN ROUGHLY 5 TO 7 PM. |
| Aug 7, 8:27 PM CDT | HEAVY RAIN 1.76 | 2 Sse Eau Claire, WI | MEASURED RAINFALL TODAY THROUGH 8 PM. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.3 hours before the alert went out and 273 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
- 20 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
349
WGUS53 KMPX 072317
FFWMPX
WIC017-033-035-080315-
/O.NEW.KMPX.FF.W.0001.210807T2317Z-210808T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Twin Cities/Chanhassen MN
617 PM CDT Sat Aug 7 2021
The National Weather Service in the Twin Cities has issued a
* Flash Flood Warning for...
Southwestern Chippewa County in west central Wisconsin...
East Central Dunn County in west central Wisconsin...
Northwestern Eau Claire County in west central Wisconsin...
* Until 1015 PM CDT.
* At 617 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 inches in 1
hour. Additional rainfall amounts up to 3 inches are possible in
the warned area. 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.
* Some locations that will experience flash flooding include...
Eau Claire, Altoona, Lake Hallie, Fall Creek, Elk Mound, Eau
Claire Airport and Seymour.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4492 9175 4491 9165 4491 9155 4489 9129
4488 9120 4480 9119 4475 9130 4475 9142
4476 9151 4482 9178 4488 9179
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5-2 INCHES IN 1 HOUR
$$
Borghoff2 follow-up statements
392
WGUS73 KMPX 080116
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
816 PM CDT Sat Aug 7 2021
WIC017-033-035-080315-
/O.CON.KMPX.FF.W.0001.000000T0000Z-210808T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chippewa WI-Dunn WI-Eau Claire WI-
816 PM CDT Sat Aug 7 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT THIS
EVENING FOR SOUTHWESTERN CHIPPEWA, EAST CENTRAL DUNN AND
NORTHWESTERN EAU CLAIRE COUNTIES...
At 816 PM CDT, the public reported flash flooding in Eau Claire.
Showers and thunderstorms produced 3 to 5.5 inches of rain earlier
this evening across the warned area. Additional showers are
beginning to develop along I-94, which could prolong any ongoing
flooding.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Public reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Eau Claire, Altoona, Lake Hallie, Fall Creek, Elk Mound, Eau
Claire Airport and Seymour.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4492 9175 4491 9165 4491 9155 4489 9129
4488 9120 4480 9119 4475 9130 4475 9142
4476 9151 4482 9178 4488 9179
FLASH FLOOD...OBSERVED
$$
Borghoff894
WGUS73 KMPX 080311
FFSMPX
Flash Flood Statement
National Weather Service Twin Cities/Chanhassen MN
1011 PM CDT Sat Aug 7 2021
WIC017-033-035-080321-
/O.EXP.KMPX.FF.W.0001.000000T0000Z-210808T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chippewa WI-Dunn WI-Eau Claire WI-
1011 PM CDT Sat Aug 7 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM CDT THIS EVENING FOR
SOUTHWESTERN CHIPPEWA, EAST CENTRAL DUNN AND NORTHWESTERN EAU CLAIRE
COUNTIES...
Heavy rainfall has ended for the time being and any flooding should
be receding. However, additional Flash Flood Warnings are likely if
heavy rain redevelops overnight. Please continue to heed remaining
road closures.
A Flash Flood Watch remains in effect until 1000 AM CDT Sunday for a
portion of west central Wisconsin.
LAT...LON 4492 9175 4491 9165 4491 9155 4489 9129
4488 9120 4480 9119 4475 9130 4475 9142
4476 9151 4482 9178 4488 9179
$$
BorghoffThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:08 PM CDT | Flash Flood Watch | MPX | Chippewa, Dunn, Eau Claire, Pepin | 25 hr |
Nearby
Flash Flood Warnings in Wisconsin, 2021Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.