Alert archive / Michigan / Tornado Watches in 2021
Tornado Watch 322
The Storm Prediction Center issued this tornado watch at Jun 26, 2021, 4:04 PM EDT for 18 counties in Michigan. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 26, 2021, 4:04 PM EDT (20:04 UTC)
- Expired
- Jun 26, 2021, 10:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
Counties Arenac County, MI, Bay County, MI, Genesee County, MI, Gladwin County, MI, Huron County, MI, Iosco County, MI, Lapeer County, MI, Livingston County, MI, Macomb County, MI, Midland County, MI, Oakland County, MI, Ogemaw County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI
The radar
The Detroit radar (KDTX), 113 km from the middle of the area, began a volume at 20:03 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 4:45 PM EDT | Tornado Warning | DTX | Bay | 30 min |
| Jun 26, 5:32 PM EDT | Severe Thunderstorm Warning | DTX | Shiawassee | 58 min |
| Jun 26, 5:42 PM EDT | Severe Thunderstorm Warning | DTX | Saginaw | 50 min |
| Jun 26, 6:05 PM EDT | Tornado Warning | DTX | Shiawassee | 55 min |
| Jun 26, 6:10 PM EDT | Severe Thunderstorm Warning | DTX | Genesee | 80 min |
| Jun 26, 6:17 PM EDT | Tornado Warning | DTX | Genesee | 43 min |
| Jun 26, 6:41 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 79 min |
| Jun 26, 6:43 PM EDT | Tornado Warning | DTX | Genesee | 42 min |
| Jun 26, 6:49 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer | 43 min |
| Jun 26, 7:38 PM EDT | Tornado Warning | DTX | Livingston | 35 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 8.1 hours before the alert went out and 111 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
- 492 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 493 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
The text
As transmitted.
244 WWUS20 KWNS 262002 SEL2 SPC WW 262002 MIZ000-LHZ000-270200- URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 322 NWS Storm Prediction Center Norman OK 405 PM EDT Sat Jun 26 2021 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Eastern Lower Michigan Lake Huron * Effective this Saturday afternoon and evening from 405 PM until 1000 PM EDT. * Primary threats include... A few tornadoes possible Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1 inch in diameter possible SUMMARY...Thunderstorms over western Lower Michigan will track eastward this afternoon across the watch area. A few supercell storms are possible, capable of damaging wind gusts and isolated tornadoes. The tornado watch area is approximately along and 60 statute miles north and south of a line from 30 miles west southwest of Saginaw MI to 35 miles east of Bad Axe MI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 321... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 23035. ...Hart
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 1:05 PM EDT | Tornado Watch | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 17 more | 9 hr |
| Jun 26, 1:48 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Bay, Berrien, Calhoun, Cass and 15 more | 57 min |
| Jun 26, 3:47 PM EDT | Mesoscale Discussion | SPC | Branch, Calhoun, Cass, Eaton, Genesee, Hillsdale and 6 more | 118 min |
| Jun 26, 7:08 PM EDT | Mesoscale Discussion | SPC | Alcona, Allegan, Arenac, Barry, Bay, Berrien and 37 more | 67 min |
Nearby
Tornado Watches in Michigan, 2021Every tornado watch 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.