Alert archive / Michigan / Special Weather Statements in 2021

Special Weather Statement, NWS Detroit, MI

July 8, 2021Monroe County, Michigan

NWS Detroit, MI issued this special weather statement at Jul 8, 2021, 3:13 PM EDT for Monroe County, Michigan. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 8, 2021, 3:13 PM EDT (19:13 UTC)
Expired
Jul 8, 2021, 4:15 PM EDT
In force
62 min
Issued by
NWS Detroit, MI

County Monroe County, MI

The radar

The Detroit radar (KDTX), 82 km from the middle of the area, began a volume at 19:16 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, 7.2 hours before the alert went out and 84 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 12:00Z on 2021-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 200 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 12:00Z on 2021-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
200 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
946 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 8, 1:50 PM EDT, 1 hour 23 minutes earlier.

Area forecast discussion, Jul 8, 1:50 PM EDT, 1 hour 23 minutes before
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Hazardous weather outlook, Jul 8, 4:03 AM EDT, 11 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
403 AM EDT Thu Jul 8 2021

MIZ047>049-053>055-060>063-068>070-075-076-082-083-090945-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
403 AM EDT Thu Jul 8 2021

This hazardous weather outlook is for southeast Michigan.

.DAY ONE...Today and Tonight

Isolated to scattered thunderstorms will be around today. A storm or
two could become marginally severe east of U.S. 23 between 11 am - 5
PM, producing damaging wind gusts to 60 MPH. In addition, isolated
stronger thunderstorms will have to potential to drop a quick inch of
rain, but just localized minor urban/low lying flooding is expected.
Storm motion looks to be east at 30 mph.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A chance of thunderstorms returns Sunday evening into early next
week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-090945-
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-
403 AM EDT Thu Jul 8 2021

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

.DAY ONE...Today and Tonight

Isolated to scattered thunderstorms will be around today. A storm or
two could become marginally severe over Lake St. Clair and Lake Erie
between 11 am - 5 PM, producing winds gusts to 50 knots. Storm motion
looks to be east at 25 knots.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A chance of thunderstorms returns Sunday evening into early next
week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

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

SF

In the hours before

Local storm report, Jul 8, 10:37 AM EDT, 4 hours 36 minutes before
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Local storm report, Jul 8, 10:56 AM EDT, 4 hours 17 minutes before
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Special weather statement, Jul 8, 2:59 PM EDT, 14 minutes before
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Special weather statement, Jul 8, 3:13 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 9:10 PM EDTSpecial Marine WarningDTX35 min
Jul 7, 9:21 PM EDTSpecial Weather StatementDTXHuron39 min
Jul 8, 3:13 AM EDTSpecial Weather StatementDTXShiawassee47 min
Jul 8, 4:46 AM EDTSpecial Weather StatementDTXWashtenaw44 min
Jul 8, 5:37 AM EDTSpecial Weather StatementDTXOakland38 min
Jul 8, 8:43 AM EDTSpecial Weather StatementDTXLivingston47 min
Jul 8, 2:59 PM EDTSpecial Weather StatementDTXWayne46 min
Jul 8, 3:29 PM EDTSpecial Weather StatementDTXOakland76 min
Jul 8, 3:56 PM EDTSpecial Marine WarningDTX34 min
Jul 8, 4:34 PM EDTSpecial Weather StatementDTXWayne26 min
Jul 8, 4:44 PM EDTSevere Thunderstorm WarningDTXMacomb, Wayne31 min
Jul 8, 4:46 PM EDTSpecial Marine WarningDTX59 min
Jul 8, 5:08 PM EDTSpecial Weather StatementDTXWayne37 min
Jul 8, 6:53 PM EDTAreal Flood AdvisoryDTXWayne112 min

Nearby

Special Weather Statements in Michigan, 2021Every special weather statement 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.