Alert archive / Michigan / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 613
The Storm Prediction Center issued this severe thunderstorm watch at Jul 16, 1997, 3:15 PM EDT for 17 counties in Michigan. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 16, 1997, 3:15 PM EDT (19:15 UTC)
- Expired
- Jul 16, 1997, 7:00 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
Counties Alcona County, MI, Alpena County, MI, Arenac County, MI, Bay County, MI, Clare County, MI, Crawford County, MI, Gladwin County, MI, Huron County, MI, Iosco County, MI, Isabella County, MI, Mecosta County, MI, Midland County, MI, Montmorency County, MI, Ogemaw County, MI, Oscoda County, MI, Presque Isle County, MI, Roscommon County, MI
The radar
The NCL Michigan radar (KAPX), 92 km from the middle of the area, began a volume at 19:19 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.
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 3:21 PM EDT | Severe Thunderstorm Warning | APX | Roscommon | 64 min |
| Jul 16, 3:29 PM EDT | Severe Thunderstorm Warning | APX | Oscoda | 46 min |
| Jul 16, 3:44 PM EDT | Severe Thunderstorm Warning | APX | Alcona, Iosco, Ogemaw | 76 min |
| Jul 16, 4:13 PM EDT | Severe Thunderstorm Warning | APX | Arenac | 77 min |
The nearest sounding before it
Alpena, MI (KAPX), launched 12:00Z, 7.3 hours before the alert went out and 134 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
- 1147 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1007 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | Delta, Dickinson, Gogebic, Iron, Menominee | 7 hr |
Nearby
Severe Thunderstorm Watches in Michigan, 1997Every severe thunderstorm watch in 1997
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.