Alert archive / Michigan / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 61, NWS Detroit, MI

August 24, 2020Wayne County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Aug 24, 2020, 2:54 PM EDT for Wayne County, Michigan. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 24, 2020, 2:54 PM EDT (18:54 UTC)
Expired
Aug 24, 2020, 3:32 PM EDT
In force
38 min
Issued by
NWS Detroit, MI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Wayne County, MI

The radar

The Detroit radar (KDTX), 49 km from the middle of the area, began a volume at 18:58 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, 6.9 hours before the alert went out and 50 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 2020-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 207 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 2020-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 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
207 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1211 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
-8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Aug 24, 1:21 PM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Aug 24, 1:21 PM EDT, 1 hour 33 minutes before
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Hazardous weather outlook, Aug 24, 3:51 AM EDT, 11 hours 3 minutes before
Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
351 AM EDT Mon Aug 24 2020

MIZ047>049-053>055-060>063-068>070-075-076-082-083-250800-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
351 AM EDT Mon Aug 24 2020

This hazardous weather outlook is for portions of southeast
Michigan.

.DAY ONE...Today and Tonight

There is a chance of thunderstorms this afternoon and evening.
Widespread severe weather is not expected, but isolated storms will
be capable of producing wind gusts up to 60 mph. Storms will move
from northwest to southeast around 20 mph.

Potential exists for thunderstorms that develop across the upper
Mississippi valley this evening will lift into lower Michigan early
Tuesday morning. Confidence in thunderstorms reaching southeast
Michigan remains low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

An unsettled pattern will periodically bring the chance of
thunderstorms Tuesday through Friday. At this time, there is the
potential for strong to severe thunderstorms to develop both Tuesday
and Wednesday, particularly during the afternoon and evening hours.
The primary threat will be wind gusts up to 60 mph.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-250800-
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-
351 AM EDT Mon Aug 24 2020

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

.DAY ONE...Today and Tonight

There is a chance of thunderstorms this afternoon and evening.
Widespread severe weather is not expected, but isolated storms will
be capable of producing wind gusts up to 50 knots. Storms will move
from northwest to southeast around 15 knots.

Potential exists for thunderstorms that develop across the upper
Mississippi valley this evening will lift into lower Michigan early
Tuesday morning. Confidence in thunderstorms reaching southeast
Michigan remains low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

An unsettled pattern will periodically bring the chance of
thunderstorms Tuesday through Friday. At this time, there is the
potential for strong to severe thunderstorms to develop both Tuesday
and Wednesday, particularly during the afternoon and evening hours.
The primary threat will be wind gusts up to 50 knots.

.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.

MR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 3:02 PM EDTSpecial Marine WarningDTX48 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2020Every severe thunderstorm warning in 2020

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.