Alert archive / Michigan / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 59, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 14, 2020, 4:14 PM EDT for Lenawee County, Michigan. It was in force for 41 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 14, 2020, 4:14 PM EDT (20:14 UTC)
- Expired
- Aug 14, 2020, 4:55 PM EDT
- In force
- 41 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Lenawee County, MI
The radar
The Detroit radar (KDTX), 102 km from the middle of the area, began a volume at 20:17 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, 8.2 hours before the alert went out and 106 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1710 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 14, 3:54 PM EDT, 20 minutes earlier.
Area forecast discussion, Aug 14, 3:54 PM EDT, 20 minutes before
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</html>Hazardous weather outlook, Aug 14, 3:30 AM EDT, 12 hours 44 minutes before
Hazardous Weather Outlook National Weather Service Detroit/Pontiac MI 330 AM EDT Fri Aug 14 2020 MIZ047>049-055-150830- Midland-Bay-Huron-Sanilac- 330 AM EDT Fri Aug 14 2020 This hazardous weather outlook is for portions of southeast Michigan. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday There is a chance of thunderstorms on Saturday and Sunday. Isolated severe thunderstorms are possible Saturday afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight. LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-150830- 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- 330 AM EDT Fri Aug 14 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 over Lake st. Clair and especially Lake Erie. These thunderstorms are not expected to be severe, but will produce heavy rainfall and wind gusts to 40 knots. Storm motion looks to be light and variable. .DAYS TWO THROUGH SEVEN...Saturday through Thursday There is a chance of thunderstorms on Saturday and Sunday. Isolated severe thunderstorms are possible both afternoons. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight. MIZ053-054-060>063-068>070-075-076-082-083-150830- Saginaw-Tuscola-Shiawassee-Genesee-Lapeer-St. Clair-Livingston- Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe- 330 AM EDT Fri Aug 14 2020 This hazardous weather outlook is for most of southeast Michigan. .DAY ONE...Today and Tonight There is a chance of thunderstorms this afternoon, especially toward the southern Michigan border. These thunderstorms are not expected to be severe, but will produce heavy rainfall and wind gusts to 45 mph. Storm motion looks to be light and variable. .DAYS TWO THROUGH SEVEN...Saturday through Thursday There is a chance of thunderstorms on Saturday and Sunday. Isolated severe thunderstorms are possible both afternoons. .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
Special weather statement, Aug 14, 12:20 PM EDT, 3 hours 54 minutes before
Special Weather Statement
National Weather Service Detroit/Pontiac MI
1220 PM EDT Fri Aug 14 2020
MIZ076-141715-
Wayne-
1220 PM EDT Fri Aug 14 2020
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WAYNE COUNTY...
At 1219 PM EDT, a strong thunderstorm was located near Belle Isle, or
near Grosse Pointe, moving west at 5 mph.
Winds in excess of 30 mph are possible with this storm.
This storm will be near...
Downtown Detroit around 1235 PM EDT.
Detroit and Dearborn around 115 PM EDT.
Other locations impacted by this storm include Highland Park,
Northeast Detroit, Harper Woods, Grosse Pointe Shores, Southwest
Detroit, Hamtramck, Grosse Pointe Woods, Grosse Pointe Park, Grosse
Pointe Farms and Melvindale.
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4236 8290 4233 8299 4232 8306 4229 8310
4229 8318 4245 8319 4245 8286
TIME...MOT...LOC 1619Z 106DEG 5KT 4239 8299
SCLocal storm report, Aug 14, 1:32 PM EDT, 2 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
132 PM EDT FRI AUG 14 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1227 PM MARINE TSTM WIND 2 S GROSSE POINTE 42.36N 82.91W
08/14/2020 M42.00 MPH LCZ460 MI MESONET
36KT GUST MEASURED AT PECHE ISLAND LIGHT.
&&
KDKSpecial weather statement, Aug 14, 1:36 PM EDT, 2 hours 38 minutes before
Special Weather Statement National Weather Service Detroit/Pontiac MI 136 PM EDT Fri Aug 14 2020 MIZ075-076-141830- Washtenaw-Wayne- 136 PM EDT Fri Aug 14 2020 ...A THUNDERSTORM WILL AFFECT NORTHWESTERN WAYNE AND EAST CENTRAL WASHTENAW COUNTIES... At 136 PM EDT, a thunderstorm was located near Ypsilanti, moving northwest at 10 mph. Winds in excess of 30 mph are possible with this storm. Locations impacted include... Ann Arbor, Livonia, Romulus, Ypsilanti, Canton, Dixboro, Westland, Wayne, Plymouth and Barton Hills. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. LAT...LON 4224 8334 4220 8364 4230 8379 4238 8342 TIME...MOT...LOC 1736Z 124DEG 10KT 4227 8355 SC
Special weather statement, Aug 14, 2:05 PM EDT, 2 hours 9 minutes before
Special Weather Statement
National Weather Service Detroit/Pontiac MI
205 PM EDT Fri Aug 14 2020
MIZ075-141845-
Washtenaw-
205 PM EDT Fri Aug 14 2020
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL WASHTENAW
COUNTY...
At 205 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Dixboro to near Grass Lake. Movement
was northwest at 15 mph.
Winds in excess of 30 mph are possible with these storms.
Locations impacted include...
Ann Arbor, Chelsea, Dexter, Manchester, Salem, Dixboro, Whitmore
Lake, Barton Hills, Hudson Mills Metropark, Delhi Mills, Pleasant
Lake, Hudson Mills and Lyndon Township.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4239 8413 4243 8369 4243 8360 4240 8355
4229 8355 4213 8413
TIME...MOT...LOC 1805Z 136DEG 13KT 4235 8361 4221 8414
SCSpecial weather statement, Aug 14, 3:33 PM EDT, 41 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 14, 12:13 PM EDT | Special Marine Warning | DTX | 36 min | |
| Aug 14, 12:20 PM EDT | Special Weather Statement | DTX | Wayne | 55 min |
| Aug 14, 1:36 PM EDT | Special Weather Statement | DTX | Washtenaw | 54 min |
| Aug 14, 2:05 PM EDT | Special Weather Statement | DTX | Washtenaw | 40 min |
| Aug 14, 2:42 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 48 min |
| Aug 14, 3:26 PM EDT | Areal Flood Advisory | DTX | Washtenaw | 2 hr |
| Aug 14, 3:33 PM EDT | Special Weather Statement | DTX | Lenawee | 42 min |
| Aug 14, 4:08 PM EDT | Special Weather Statement | DTX | Lenawee | 52 min |
| Aug 14, 4:40 PM EDT | Special Weather Statement | DTX | Lenawee | 65 min |
| Aug 14, 4:47 PM EDT | Areal Flood Advisory | DTX | Lenawee | 3 hr |
| Aug 14, 5:23 PM EDT | Special Weather Statement | DTX | Shiawassee | 52 min |
| Aug 14, 5:45 PM EDT | Special Weather Statement | DTX | Lenawee | 60 min |
| Aug 14, 5:52 PM EDT | Special Weather Statement | DTX | Saginaw | 53 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.