Alert archive / Wisconsin / Areal Flood Advisories in 2021
Areal Flood Advisory 15, NWS Green Bay, WI
NWS Green Bay, WI issued this areal flood advisory at Jul 28, 2021, 10:35 PM CDT for 7 counties in Wisconsin. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 28, 2021, 10:35 PM CDT (03:35 UTC)
- Expired
- Jul 29, 2021, 1:10 AM CDT
- In force
- 3 hr
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
Counties Marathon County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI
The radar
The Green Bay radar (KGRB), 75 km from the middle of the area, began a volume at 03:38 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, 3.6 hours before the alert went out and 75 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
- 593 J/kg
- Mixed-layer CIN
- -264 J/kg
- Mixed-layer LCL
- 1088 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Green Bay, WI wrote its last area forecast discussion before this areal flood advisory went out at Jul 28, 9:18 PM CDT, 1 hour 17 minutes earlier.
Area forecast discussion, Jul 28, 9:18 PM CDT, 1 hour 17 minutes before
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</html>Hazardous weather outlook, Jul 28, 3:35 PM CDT, 7 hours before
Hazardous Weather Outlook National Weather Service Green Bay WI 335 PM CDT Wed Jul 28 2021 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-292045- Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano- Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 335 PM CDT Wed Jul 28 2021 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...Tonight Scattered non severe thunderstorms are possible across northcentral Wisconsin late this afternoon. Some severe thunderstorms are expected this evening, and a significant severe weather event is possible. Damaging winds and local flooding rainfall are the main threats, but large hail and tornadoes are possible. .DAYS TWO THROUGH SEVEN...Thursday through Wednesday Thunderstorms are possible Saturday as a cold front moves across the area. A few storms with hail and gusty winds are possible. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed this evening. LMZ521-522-541>543-292045- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 335 PM CDT Wed Jul 28 2021 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...Tonight Thunderstorms with strong winds, hail, and dangerous lightning could create hazardous conditions for mariners tonight. .DAYS TWO THROUGH SEVEN...Thursday through Wednesday Winds and waves may approach small craft criteria Thursday afternoon and evening, especially in areas adjacent to northern Door County. Thunderstorms could create hazardous conditions Saturday. RDM/RDM
In the hours before
Local storm report, Jul 28, 9:39 PM CDT, 56 minutes before
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</html>Local storm report, Jul 28, 9:40 PM CDT, 55 minutes before
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</html>Local storm report, Jul 28, 9:41 PM CDT, 54 minutes before
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</html>Local storm report, Jul 28, 9:57 PM CDT, 38 minutes before
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</html>Local storm report, Jul 28, 10:17 PM CDT, 18 minutes before
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</html>Local storm report, Jul 28, 10:22 PM CDT, 13 minutes before
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</html>The office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 7:04 PM CDT | Special Weather Statement | GRB | Lincoln, Oneida, Vilas | 41 min |
| Jul 28, 7:36 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln, Marathon | 39 min |
| Jul 28, 7:36 PM CDT | Severe Thunderstorm Warning | GRB | Oneida | 39 min |
| Jul 28, 7:52 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln | 53 min |
| Jul 28, 8:20 PM CDT | Special Weather Statement | GRB | Shawano | 40 min |
| Jul 28, 8:37 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln, Marathon, Shawano | 53 min |
| Jul 28, 8:58 PM CDT | Tornado Warning | GRB | Marathon | 32 min |
| Jul 28, 9:05 PM CDT | Areal Flood Advisory | GRB | Langlade, Lincoln, Marathon, Shawano | 3 hr |
| Jul 28, 9:21 PM CDT | Tornado Warning | GRB | Marathon, Portage | 24 min |
| Jul 28, 9:22 PM CDT | Severe Thunderstorm Warning | GRB | Marathon, Portage, Shawano, Waupaca | 53 min |
| Jul 28, 9:54 PM CDT | Tornado Warning | GRB | Portage, Waupaca | 36 min |
| Jul 28, 10:10 PM CDT | Severe Thunderstorm Warning | GRB | Outagamie, Portage, Waupaca, Waushara, Winnebago | 65 min |
| Jul 28, 10:18 PM CDT | Severe Thunderstorm Warning | GRB | Wood | 43 min |
| Jul 28, 11:12 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Waupaca, Waushara, Winnebago | 45 min |
| Jul 28, 11:38 PM CDT | Tornado Warning | GRB | Winnebago | 16 min |
| Jul 29, 3:42 AM CDT | Small Craft Advisory | GRB | 23 hr |
Nearby
Areal 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.