Alert archive / Michigan / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 46, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Jul 10, 2020, 11:58 AM EDT for Monroe County, Washtenaw County, Wayne County, Michigan. It was in force for 46 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
- Jul 10, 2020, 11:58 AM EDT (15:58 UTC)
- Expired
- Jul 10, 2020, 12:44 PM EDT
- In force
- 46 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Monroe County, MI, Washtenaw County, MI, Wayne County, MI
The radar
The Detroit radar (KDTX), 61 km from the middle of the area, began a volume at 16:01 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, 4.0 hours before the alert went out and 64 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
- 1052 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1048 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
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 Jul 10, 11:48 AM EDT, 10 minutes earlier.
Area forecast discussion, Jul 10, 11:48 AM EDT, 10 minutes before
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</html>Hazardous weather outlook, Jul 10, 9:30 AM EDT, 2 hours 28 minutes before
Hazardous Weather Outlook National Weather Service Detroit/Pontiac MI 930 AM EDT Fri Jul 10 2020 MIZ047>049-053>055-060>063-068>070-075-076-082-083-110930- Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer- St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe- 930 AM EDT Fri Jul 10 2020 This hazardous weather outlook is for southeast Michigan. .DAY ONE...Today and Tonight Numerous thunderstorms around today through this evening producing heavy rainfall, with most locations receiving over 1 inch of rain. Localized amounts in excess of 2 inches will lead to urban and low lying flooding. In addition, isolated thunderstorms producing wet micro-bursts winds of 50-60 mph will also be around, especially across the Detroit Metro Area this afternoon. Storm motion looks to be northeast between 20-25 mph. .DAYS TWO THROUGH SEVEN...Saturday through Thursday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight. LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-110930- 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- 930 AM EDT Fri Jul 10 2020 This hazardous weather outlook is for portions of Lake Erie, Lake Huron and Lake St Clair. .DAY ONE...Today and Tonight Numerous thunderstorms this afternoon through this evening producing heavy rainfall significantely reducing visibility and isolated wind gusts of 45 knots. Storm motion will be northeast at 20 knots. .DAYS TWO THROUGH SEVEN...Saturday through Thursday No hazardous weather is expected at this time. .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 10, 5:58 AM EDT, 6 hours before
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</html>Local storm report, Jul 10, 7:40 AM EDT, 4 hours 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
740 AM EDT FRI JUL 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0630 PM TSTM WND DMG 5 W CROSWELL 43.26N 82.71W
07/09/2020 SANILAC MI LAW ENFORCEMENT
DOWNED POWERLINE IN BUEL TOWNSHIP NEAR PECK AND KILGORE
ROADS. TIME ESTIMATED BASED ON RADAR.
&&
AARNOLDSpecial weather statement, Jul 10, 10:24 AM EDT, 1 hour 34 minutes before
Special Weather Statement National Weather Service Detroit/Pontiac MI 1024 AM EDT Fri Jul 10 2020 MIZ082-101515- Lenawee MI- 1024 AM EDT Fri Jul 10 2020 ...STRONG THUNDERSTORMS WILL AFFECT WESTERN PORTIONS OF LENAWEE COUNTY UNTIL 1115 AM EDT... At 1015 AM EDT, Doppler radar was tracking strong thunderstorms near Hudson, moving northeast at 35 mph. Winds in excess of 40 mph and small hail up to a half inch will be possible with these storms. Locations impacted include... Adrian, Tecumseh, Hudson, Morenci, Clinton, Onsted, Addison, Cement City, Clayton, Rollin, Fairfield, Springville, Macon, Seneca, Jasper, Medina, Manitou Beach-Devils Lake, Canandaigua, Sand. Creek and Weston. LAT...LON 4207 8436 4208 8384 4172 8403 4171 8436 TIME...MOT...LOC 1415Z 231DEG 33KT 4181 8441 AA
Special weather statement, Jul 10, 11:21 AM EDT, 37 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 |
|---|---|---|---|---|
| Jul 9, 8:40 PM EDT | Special Weather Statement | DTX | Genesee | 65 min |
| Jul 9, 9:03 PM EDT | Special Weather Statement | DTX | Livingston | 57 min |
| Jul 9, 9:16 PM EDT | Special Weather Statement | DTX | Monroe | 44 min |
| Jul 9, 9:28 PM EDT | Special Weather Statement | DTX | Livingston | 62 min |
| Jul 9, 9:35 PM EDT | Special Weather Statement | DTX | Washtenaw | 40 min |
| Jul 9, 9:41 PM EDT | Severe Thunderstorm Warning | DTX | Livingston, Washtenaw | 48 min |
| Jul 9, 9:56 PM EDT | Special Weather Statement | DTX | Washtenaw | 49 min |
| Jul 9, 10:23 PM EDT | Special Weather Statement | DTX | Oakland | 52 min |
| Jul 9, 11:01 PM EDT | Special Weather Statement | DTX | Genesee, Oakland | 59 min |
| Jul 9, 11:42 PM EDT | Special Weather Statement | DTX | Lapeer | 63 min |
| Jul 10, 10:24 AM EDT | Special Weather Statement | DTX | Lenawee | 51 min |
| Jul 10, 10:53 AM EDT | Severe Thunderstorm Warning | DTX | Lenawee | 52 min |
| Jul 10, 11:21 AM EDT | Special Weather Statement | DTX | Washtenaw | 39 min |
| Jul 10, 1:06 PM EDT | Special Weather Statement | DTX | Macomb, Oakland, Wayne | 54 min |
| Jul 10, 1:23 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Oakland | 52 min |
| Jul 10, 1:57 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Saint Clair | 63 min |
| Jul 10, 2:44 PM EDT | Special Marine Warning | DTX | 61 min | |
| Jul 10, 2:45 PM EDT | Special Weather Statement | DTX | Saint Clair | 60 min |
| Jul 10, 2:51 PM EDT | Special Marine Warning | DTX | 39 min | |
| Jul 10, 3:06 PM EDT | Flash Flood Watch | DTX | Genesee, Huron, Lapeer, Macomb, Oakland, Saint Clair and 3 more | 10 hr |
| Jul 10, 7:51 PM EDT | Areal Flood Advisory | DTX | Bay, Saginaw, Tuscola | 3 hr |
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.