Alert archive / Wisconsin / Flash Flood Watches in 2021
Flash Flood Watch 1, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood watch at Aug 7, 2021, 6:08 PM CDT for 4 counties in Wisconsin. It was in force for 25 hr.
The area
The counties it named.
The facts
- Issued
- Aug 7, 2021, 6:08 PM CDT (23:08 UTC)
- Expired
- Aug 8, 2021, 7:22 PM CDT
- In force
- 25 hr
- Issued by
- NWS Twin Cities, MN
- Flood severity
- None
Counties Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI
The radar
The La Crosse radar (KARX), 115 km from the middle of the area, began a volume at 23:10 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.1 hours before the alert went out and 283 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.
796 WGUS63 KMPX 072308 FFAMPX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Twin Cities/Chanhassen MN 608 PM CDT Sat Aug 7 2021 WIZ025>028-080900- /O.NEW.KMPX.FF.A.0001.210807T2308Z-210808T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Dunn-Pepin-Chippewa-Eau Claire- Including the cities of Durand, Eau Claire, Menomonie, and Chippewa Falls 608 PM CDT Sat Aug 7 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH SUNDAY MORNING... The National Weather Service in the Twin Cities has issued a * Flash Flood Watch for a portion of west central Wisconsin, including the following counties, Chippewa, Dunn, Eau Claire and Pepin. * Through Sunday morning. * Rounds of thunderstorms and heavy rainfall could produce totals of 3 to 5 inches, leading to the possibility of flash flooding. * Flash flooding of creeks, streams, urban areas, and low lying areas is possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Borghoff
2 follow-up statements
739 WGUS63 KMPX 080906 FFAMPX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Twin Cities/Chanhassen MN 406 AM CDT Sun Aug 8 2021 WIZ025-026-081015- /O.CAN.KMPX.FF.A.0001.000000T0000Z-210808T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Dunn-Pepin- Including the cities of Durand and Menomonie 406 AM CDT Sun Aug 8 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for a portion of west central Wisconsin, including the following counties, Dunn and Pepin has been cancelled. The risk of additional heavy rainfall has diminished, therefore the Flash Flood Watch is cancelled. $$ WIZ027-028-081715- /O.EXT.KMPX.FF.A.0001.000000T0000Z-210809T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chippewa-Eau Claire- Including the cities of Eau Claire and Chippewa Falls 406 AM CDT Sun Aug 8 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch is now in effect for * A portion of west central Wisconsin, including the following counties, Chippewa and Eau Claire. * Through late tonight. * After 5 to 6 inches of rain were observed between Eau Claire and Chippewa Falls on Saturday, the Eau Claire metro area will remain sensitive to seeing flooding issues if any additional heavy rain is seen today. Therefore, the Flash Flood Watch was extended into tonight for the Eau Claire area. * Flash Flooding of creeks, streams, urban areas, and low lying areas is |possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MPG
025 WGUS63 KMPX 090022 FFAMPX Flood Watch National Weather Service Twin Cities/Chanhassen MN 722 PM CDT Sun Aug 8 2021 WIZ027-028-090130- /O.CAN.KMPX.FF.A.0001.000000T0000Z-210809T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chippewa-Eau Claire- Including the cities of Eau Claire and Chippewa Falls 722 PM CDT Sun Aug 8 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for a portion of west central Wisconsin, including the following counties, Chippewa and Eau Claire has been cancelled. The Flood Watch is cancelled. Scattered showers, some with heavy downpours, are possible this evening but flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ Borghoff
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:17 PM CDT | Flash Flood Warning | MPX | Chippewa, Dunn, Eau Claire | 4 hr |
Nearby
Flash Flood Watches in Wisconsin, 2021Every flash flood watch 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.