Alert archive / Michigan / Areal Flood Warnings in 2021

Areal Flood Warning 3, NWS Detroit, MI

June 26, 2021Washtenaw County, Wayne County, Michigan

NWS Detroit, MI issued this areal flood warning at Jun 26, 2021, 5:54 AM EDT for Washtenaw County, Wayne County, Michigan. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 26, 2021, 5:54 AM EDT (09:54 UTC)
Expired
Jun 26, 2021, 3:50 PM EDT
In force
10 hr
Issued by
NWS Detroit, MI
Area
Storm-based polygon
Flood severity
None

Counties Washtenaw County, MI, Wayne County, MI

The radar

The Detroit radar (KDTX), 48 km from the middle of the area, began a volume at 09:52 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 00:00Z, 9.9 hours before the alert went out and 51 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.

Skew-T log-pSkew-T log-p diagram, Detroit, MI at 00:00Z on 2021-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 289 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 00:00Z on 2021-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
289 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
610 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
231 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Jun 26, 4:01 AM EDT, 1 hour 53 minutes earlier.

Area forecast discussion, Jun 26, 4:01 AM EDT, 1 hour 53 minutes before
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Hazardous weather outlook, Jun 26, 4:23 AM EDT, 1 hour 31 minutes before
Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
423 AM EDT Sat Jun 26 2021

MIZ047>049-053>055-060>063-068>070-075-076-082-083-270900-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
423 AM EDT Sat Jun 26 2021

This hazardous weather outlook is for portions of southeast
Michigan.

.DAY ONE...Today and Tonight

A Flood Watch is in effect through tonight. Refer to the latest
urgent weather message for additional information.

There is a Slight Risk of severe weather today for most of Southeast
Michigan with a Marginal Risk south of a line from about Port Huron
to Adrian. Damaging wind gusts to 60 mph will be the primary threat
with these storms. Secondary threats include an isolated tornado or
two and large hail. Storm motion will be northeast around 45 mph.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Active stretch of weather continues on Sunday with a Marginal Risk
of severe storms. The main threat for thunderstorm activity will be
damaging wind gusts to 60 mph and torrential rainfall which could
lead to localized flooding concerns.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-270900-
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-
423 AM EDT Sat Jun 26 2021

This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.

.DAY ONE...Today and Tonight

There is a Slight Risk of severe weather today for most of Southeast
Michigan with a Marginal Risk south of a line from about Port Huron
to Adrian. Damaging wind gusts to 50 knots will be the primary
threat with these storms. Secondary threats include an isolated
waterspout or two and large hail. Storm motion will be northeast
around 45 mph.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Active stretch of weather continues on Sunday with a Marginal Risk
of severe storms. The main threat for thunderstorm activity will be
damaging wind gusts to 60 mph.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

DRK

In the hours before

Local storm report, Jun 26, 12:04 AM EDT, 5 hours 50 minutes before
PRELIMINARY LOCAL STORM REPORT
National Weather Service Detroit/Pontiac MI
1204 AM EDT SAT JUN 26 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1202 AM     HEAVY RAIN       SOUTHGATE               42.20N 83.21W
06/26/2021  M1.64 INCH       WAYNE              MI   TRAINED SPOTTER

            17 HOUR RAINFALL TOTAL.

&&

XX
Local storm report, Jun 26, 12:49 AM EDT, 5 hours 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1249 AM EDT SAT JUN 26 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1238 AM     FLOOD            ANN ARBOR               42.28N 83.73W
06/26/2021                   WASHTENAW          MI   EMERGENCY MNGR

            EMERGENCY MANAGEMENT REPORTS AROUND A DOZEN ROADS
            IMPASSIBLE AROUND THE SOUTH SIDE OF ANN ARBOR. SOME ROADS
            WITH 12 TO 18 INCHES OF WATER ACROSS THEM.

1245 AM     FLOOD            YPSILANTI               42.24N 83.62W
06/26/2021                   WASHTENAW          MI   EMERGENCY MNGR

            EMERGENCY MANAGEMENT REPORTS NUMEROUS ROADS IMPASSIBLE IN
            BOTH YPSILANTI CITY AND YPSILANTI TOWNSHIP

1245 AM     FLOOD            PITTSFIELD TOWNSHIP     42.20N 83.70W
06/26/2021                   WASHTENAW          MI   EMERGENCY MNGR

            EMERGENCY MANAGEMENT REPORTS NUMEROUS ROADS IMPASSIBLE IN
            PITTSFIELD TOWNSHIP.

&&

DKOOK

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 25, 8:02 PM EDTSpecial Weather StatementDTXMacomb28 min
Jun 25, 8:12 PM EDTSpecial Weather StatementDTXLapeer78 min
Jun 25, 8:32 PM EDTSpecial Marine WarningDTX73 min
Jun 26, 12:15 AM EDTAreal Flood AdvisoryDTXWashtenaw, Wayne3 hr
Jun 26, 12:58 AM EDTFlash Flood WarningDTXWashtenaw, Wayne5 hr
Jun 26, 2:20 AM EDTAreal Flood AdvisoryDTXMacomb, Oakland, Saint Clair3 hr
Jun 26, 2:51 AM EDTRiver Flood WarningDTXWayne36 hr
Jun 26, 2:52 AM EDTRiver Flood WarningDTXWayne36 hr
Jun 26, 3:15 AM EDTRiver Flood WarningDTXWayne32 hr
Jun 26, 4:00 AM EDTFlood WatchDTXBay, Genesee, Huron, Lapeer, Lenawee, Livingston and 11 more22 hr
Jun 26, 8:57 AM EDTRiver Flood WarningDTXMacomb17 hr
Jun 26, 9:45 AM EDTMarine Dense Fog AdvisoryDTX24 hr
Jun 26, 2:53 PM EDTSmall Craft AdvisoryDTX7 hr
Jun 26, 3:05 PM EDTSpecial Weather StatementDTXSanilac40 min
Jun 26, 3:12 PM EDTSpecial Marine WarningDTX78 min
Jun 26, 3:44 PM EDTSpecial Weather StatementDTXBay46 min
Jun 26, 4:16 PM EDTSpecial Marine WarningDTX59 min
Jun 26, 4:45 PM EDTTornado WarningDTXBay30 min
Jun 26, 5:07 PM EDTSpecial Marine WarningDTX47 min
Jun 26, 5:32 PM EDTSevere Thunderstorm WarningDTXShiawassee58 min
Jun 26, 5:37 PM EDTSpecial Marine WarningDTX53 min
Jun 26, 5:42 PM EDTSevere Thunderstorm WarningDTXSaginaw50 min
Jun 26, 6:05 PM EDTTornado WarningDTXShiawassee55 min
Jun 26, 6:10 PM EDTSevere Thunderstorm WarningDTXGenesee80 min
Jun 26, 6:17 PM EDTTornado WarningDTXGenesee43 min
Jun 26, 6:41 PM EDTSevere Thunderstorm WarningDTXLivingston79 min
Jun 26, 6:43 PM EDTTornado WarningDTXGenesee42 min
Jun 26, 6:49 PM EDTSevere Thunderstorm WarningDTXLapeer43 min
Jun 26, 7:38 PM EDTTornado WarningDTXLivingston35 min
Jun 26, 7:55 PM EDTSpecial Weather StatementDTXLapeer, Oakland65 min

Nearby

Areal Flood Warnings in Michigan, 2021Every areal 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.