Alert archive / Michigan / Areal Flood Advisories in 2021
Areal Flood Advisory 21, NWS Detroit, MI
NWS Detroit, MI issued this areal flood advisory at Aug 27, 2021, 8:32 AM EDT for Saginaw County, Michigan. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 27, 2021, 8:32 AM EDT (12:32 UTC)
- Expired
- Aug 27, 2021, 11:45 AM EDT
- In force
- 3 hr
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
County Saginaw County, MI
The radar
The Detroit radar (KDTX), 85 km from the middle of the area, began a volume at 12:33 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
Detroit, MI (KDTX), launched 12:00Z, 0.5 hours before the alert went out and 85 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
- 319 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 912 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 75 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 Detroit, MI wrote its last area forecast discussion before this areal flood advisory went out at Aug 27, 7:13 AM EDT, 1 hour 19 minutes earlier.
Area forecast discussion, Aug 27, 7:13 AM EDT, 1 hour 19 minutes before
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</html>Hazardous weather outlook, Aug 27, 4:52 AM EDT, 3 hours 40 minutes before
Hazardous Weather Outlook National Weather Service Detroit/Pontiac MI 452 AM EDT Fri Aug 27 2021 MIZ047-048-053>055-060>063-068>070-075-076-082-083-280900- Midland-Bay-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer- St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe- 452 AM EDT Fri Aug 27 2021 This hazardous weather outlook is for portions of southeast Michigan. .DAY ONE...Today and Tonight Isolated to scattered thunderstorms are expected today and tonight, moving southwest to northeast at around 15 mph. Isolated storms may produce strong gusts in excess of 50 mph, but the main threat will be localized heavy rainfall as storms will likely produce rainfall rates in excess of 1 inch per hour. This may lead to flooding of urban, low-lying, or otherwise flood prone areas. Hot and muggy conditions persist today with heat index values ranging from the mid 80s to mid 90s. .DAYS TWO THROUGH SEVEN...Saturday through Thursday A Heat Advisory may be needed for parts of Southeast Michigan on Saturday and Sunday as heat index values reach the upper 90s to near 100 degrees. Isolated to scattered thunderstorms are possible both days with heavy rainfall and localized flooding the primary threat. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated today and tonight. MIZ049-280900- Huron- 452 AM EDT Fri Aug 27 2021 This hazardous weather outlook is for Huron County. .DAY ONE...Today and Tonight A Beach Hazards Statement has been issued. See the latest Coastal Hazard Message for details. Isolated to scattered thunderstorms are expected today and tonight, moving southwest to northeast at around 15 mph. Isolated storms may produce strong gusts in excess of 50 mph, but the main threat will be localized heavy rainfall as storms will likely produce rainfall rates in excess of 1 inch per hour. This may lead to flooding of urban, low-lying, or otherwise flood prone areas. Hot and muggy conditions persist today with heat index values ranging from the mid 80s to mid 90s. .DAYS TWO THROUGH SEVEN...Saturday through Thursday A Heat Advisory may be needed for parts of Southeast Michigan on Saturday and Sunday as heat index values reach the upper 90s to near 100 degrees. Isolated to scattered thunderstorms are possible both days with heavy rainfall and localized flooding the primary threat. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated today and tonight. LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-280900- Lake St Clair- Michigan Waters of Lake Erie from Detroit River to North Cape MI- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI- Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI- Port Sanilac to Port Huron MI- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 452 AM EDT Fri Aug 27 2021 This hazardous weather outlook is for portions of Lake Erie, Lake Huron and Lake St Clair. .DAY ONE...Today and Tonight A Small Craft Advisory is in effect. See the latest Marine Weather Message for details. Isolated to scattered thunderstorms are expected today and tonight, moving southwest to northeast at around 10 kt. Isolated storms may produce strong gusts in excess of 34 kt. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Isolated to scattered thunderstorms are possible Saturday and Sunday as the humid and unstable air mass remains over the region. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated today and tonight. You can obtain your latest National Weather Service forecasts online at www.weather.gov/detroit. TF
In the hours before
Special weather statement, Aug 27, 6:43 AM EDT, 1 hour 49 minutes before
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</html>The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 9:34 PM EDT | Small Craft Advisory | DTX | 30 hr | |
| Aug 27, 4:04 AM EDT | Beach Hazards Statement | DTX | Huron | 18 hr |
| Aug 27, 6:43 AM EDT | Special Weather Statement | DTX | Bay, Midland, Saginaw | 62 min |
| Aug 27, 10:03 AM EDT | Areal Flood Advisory | DTX | Genesee | 3 hr |
| Aug 27, 12:08 PM EDT | Special Weather Statement | DTX | Wayne | 67 min |
| Aug 27, 12:22 PM EDT | Special Weather Statement | DTX | Macomb | 68 min |
| Aug 27, 12:47 PM EDT | Areal Flood Advisory | DTX | Oakland, Wayne | 3 hr |
| Aug 27, 12:57 PM EDT | Special Weather Statement | DTX | Macomb | 63 min |
| Aug 27, 1:02 PM EDT | Special Marine Warning | DTX | 58 min | |
| Aug 27, 1:12 PM EDT | Flash Flood Warning | DTX | Oakland, Wayne | 3 hr |
| Aug 27, 1:56 PM EDT | Flash Flood Warning | DTX | Wayne | 2 hr |
| Aug 27, 4:26 PM EDT | Areal Flood Warning | DTX | Wayne | 6 hr |
Nearby
Areal Flood Advisories in Michigan, 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.