Alert archive / Wisconsin / Flash Flood Watches in 2021
Flash Flood Watch 1, NWS Milwaukee, WI
NWS Milwaukee, WI issued this flash flood watch at Aug 8, 2021, 2:43 AM CDT for 9 counties in Wisconsin. It was in force for 17 hr.
The area
The counties it named.
The facts
- Issued
- Aug 8, 2021, 2:43 AM CDT (07:43 UTC)
- Expired
- Aug 8, 2021, 7:25 PM CDT
- In force
- 17 hr
- Issued by
- NWS Milwaukee, WI
- Flood severity
- None
Counties Columbia County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Sauk County, WI, Washington County, WI
The radar
The Milwaukee radar (KMKX), 62 km from the middle of the area, began a volume at 07:46 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 00:00Z, 7.7 hours before the alert went out and 122 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
- 22 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 1055 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
362 WGUS63 KMKX 080743 FFAMKX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Milwaukee/Sullivan WI 243 AM CDT Sun Aug 8 2021 WIZ046-047-051-056>060-066-081545- /O.NEW.KMKX.FF.A.0001.210808T0743Z-210809T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Marquette-Green Lake-Fond du Lac-Sauk-Columbia-Dodge-Washington- Ozaukee-Milwaukee- Including the cities of Reedsburg, Lake Wisconsin, Neshkoro, Montello, Columbus, Waupun, Grafton, West Bend, Berlin, Hartford, Mequon, Portage, Oxford, Fond Du Lac, Germantown, Princeton, Sauk City, Lodi, Baraboo, Westfield, Cedarburg, Beaver Dam, Mayville, Markesan, Milwaukee, Endeavor, and Prairie Du Sac 243 AM CDT Sun Aug 8 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... The National Weather Service in Milwaukee/Sullivan has issued a * Flash Flood Watch for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin, including the following areas, in east central Wisconsin, Fond du Lac. In south central Wisconsin, Columbia, Green Lake, Marquette and Sauk. In southeast Wisconsin, Dodge, Milwaukee, Ozaukee and Washington. * Through late tonight. * Very heavy rainfall over the past two days has quickly saturated the soils across central and southern Wisconsin. Additional heavy rainfall is expected again today as another round of storms impacts the area. This additional rainfall could quickly lead to flash flooding where the heaviest rainfall over the past two days has occurred. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ STUMPF
3 follow-up statements
554 WGUS63 KMKX 081402 FFAMKX Flood Watch National Weather Service Milwaukee/Sullivan WI 902 AM CDT Sun Aug 8 2021 WIZ046-047-051-056>060-066-082215- /O.CON.KMKX.FF.A.0001.000000T0000Z-210809T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Marquette-Green Lake-Fond du Lac-Sauk-Columbia-Dodge-Washington- Ozaukee-Milwaukee- Including the cities of Reedsburg, Lake Wisconsin, Neshkoro, Montello, Columbus, Waupun, Grafton, West Bend, Berlin, Hartford, Mequon, Portage, Oxford, Fond Du Lac, Germantown, Princeton, Sauk City, Lodi, Baraboo, Westfield, Cedarburg, Beaver Dam, Mayville, Markesan, Milwaukee, Endeavor, and Prairie Du Sac 902 AM CDT Sun Aug 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin, including the following areas, in east central Wisconsin, Fond du Lac. In south central Wisconsin, Columbia, Green Lake, Marquette and Sauk. In southeast Wisconsin, Dodge, Milwaukee, Ozaukee and Washington. * Through late tonight. * Very heavy rainfall over the past two days has quickly saturated the soils across central and southern Wisconsin. Additional heavy rainfall is expected again today as another round of storms impacts the area. This additional rainfall could quickly lead to flash flooding where the heaviest rainfall over the past two days has occurred. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ COLLAR
837 WGUS63 KMKX 081904 FFAMKX Flood Watch National Weather Service Milwaukee/Sullivan WI 204 PM CDT Sun Aug 8 2021 WIZ046-047-051-056>060-066-090315- /O.CON.KMKX.FF.A.0001.000000T0000Z-210809T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Marquette-Green Lake-Fond du Lac-Sauk-Columbia-Dodge-Washington- Ozaukee-Milwaukee- Including the cities of Reedsburg, Lake Wisconsin, Neshkoro, Montello, Columbus, Waupun, Grafton, West Bend, Berlin, Hartford, Mequon, Portage, Oxford, Fond Du Lac, Germantown, Princeton, Sauk City, Lodi, Baraboo, Westfield, Cedarburg, Beaver Dam, Mayville, Markesan, Milwaukee, Endeavor, and Prairie Du Sac 204 PM CDT Sun Aug 8 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 1 AM CDT MONDAY... The Flash Flood Watch continues for * Portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin, including the following areas, in east central Wisconsin, Fond du Lac. In south central Wisconsin, Columbia, Green Lake, Marquette and Sauk. In southeast Wisconsin, Dodge, Milwaukee, Ozaukee and Washington. * Until 1 AM CDT Monday. * Very heavy rainfall over the past two days has quickly saturated the soils across central and southern Wisconsin. Additional heavy rainfall is expected again today as another round of storms impacts the area. This additional rainfall could quickly lead to flash flooding where the heaviest rainfall over the past two days has occurred. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
291 WGUS63 KMKX 090025 FFAMKX Flood Watch National Weather Service Milwaukee/Sullivan WI 725 PM CDT Sun Aug 8 2021 WIZ046-047-051-056>060-066-090130- /O.CAN.KMKX.FF.A.0001.000000T0000Z-210809T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Marquette-Green Lake-Fond du Lac-Sauk-Columbia-Dodge-Washington- Ozaukee-Milwaukee- Including the cities of Reedsburg, Lake Wisconsin, Neshkoro, Montello, Columbus, Waupun, Grafton, West Bend, Berlin, Hartford, Mequon, Portage, Oxford, Fond Du Lac, Germantown, Princeton, Sauk City, Lodi, Baraboo, Westfield, Cedarburg, Beaver Dam, Mayville, Markesan, Milwaukee, Endeavor, and Prairie Du Sac 725 PM CDT Sun Aug 8 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin, including the following areas, in east central Wisconsin, Fond du Lac. In south central Wisconsin, Columbia, Green Lake, Marquette and Sauk. In southeast Wisconsin, Dodge, Milwaukee, Ozaukee and Washington has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ PATTERSON
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 7:00 PM CDT | Special Weather Statement | MKX | Rock | 30 min |
| Aug 7, 7:20 PM CDT | Special Weather Statement | MKX | Waukesha | 25 min |
| Aug 7, 7:32 PM CDT | Special Weather Statement | MKX | Walworth | 58 min |
| Aug 7, 7:51 PM CDT | Special Weather Statement | MKX | Milwaukee, Waukesha | 54 min |
| Aug 7, 8:06 PM CDT | Special Weather Statement | MKX | Racine, Walworth | 69 min |
| Aug 7, 9:13 PM CDT | Special Weather Statement | MKX | Green Lake, Marquette | 77 min |
| Aug 7, 10:01 PM CDT | Special Weather Statement | MKX | Dodge, Fond du Lac, Washington | 59 min |
| Aug 7, 10:22 PM CDT | Areal Flood Advisory | MKX | Fond du Lac, Green Lake, Marquette | 3 hr |
| Aug 7, 10:33 PM CDT | Special Weather Statement | MKX | Ozaukee, Sheboygan | 57 min |
| Aug 7, 11:00 PM CDT | Special Weather Statement | MKX | Washington | 60 min |
| Aug 7, 11:36 PM CDT | Areal Flood Advisory | MKX | Dodge, Ozaukee, Washington | 75 min |
| Aug 7, 11:56 PM CDT | Special Weather Statement | MKX | Dodge | 34 min |
| Aug 8, 12:49 AM CDT | Areal Flood Warning | MKX | Dodge, Ozaukee, Washington | 6 hr |
| Aug 8, 12:56 AM CDT | River Flood Warning | MKX | Fond du Lac | 11 hr |
| Aug 8, 1:37 AM CDT | Areal Flood Warning | MKX | Milwaukee, Ozaukee, Washington, Waukesha | 5 hr |
| Aug 8, 2:19 AM CDT | Flash Flood Warning | MKX | Milwaukee, Ozaukee | 3 hr |
| Aug 8, 9:54 AM CDT | Small Craft Advisory | MKX | 10 hr | |
| Aug 8, 4:24 PM CDT | Severe Thunderstorm Warning | MKX | Green Lake, Marquette | 36 min |
| Aug 8, 4:38 PM CDT | Special Weather Statement | MKX | Dodge | 37 min |
| Aug 8, 4:50 PM CDT | Severe Thunderstorm Warning | MKX | Washington | 25 min |
| Aug 8, 5:05 PM CDT | Special Marine Warning | MKX | 24 min | |
| Aug 8, 5:12 PM CDT | Special Weather Statement | MKX | Washington | 33 min |
| Aug 8, 5:37 PM CDT | Special Weather Statement | MKX | Sheboygan | 23 min |
| Aug 8, 5:45 PM CDT | Severe Thunderstorm Warning | MKX | Sheboygan | 30 min |
| Aug 8, 6:09 PM CDT | Special Marine Warning | MKX | 51 min | |
| Aug 8, 6:50 PM CDT | Special Marine Warning | MKX | 55 min |
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.