Alert archive / Michigan / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 520

June 24, 199731 counties in Michigan

The Storm Prediction Center issued this severe thunderstorm watch at Jun 24, 1997, 10:00 PM EDT for 31 counties in Michigan. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jun 24, 1997, 10:00 PM EDT (02:00 UTC)
Expired
Jun 25, 1997, 2:00 AM EDT
In force
4 hr
Issued by
the Storm Prediction Center
All 31 counties

Alcona County, MI, Alpena County, MI, Antrim County, MI, Arenac County, MI, Bay County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Clare County, MI, Crawford County, MI, Emmet County, MI, Gladwin County, MI, Grand Traverse County, MI, Huron County, MI, Iosco County, MI, Isabella County, MI, Kalkaska County, MI, Luce County, MI, Mackinac County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montmorency County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI, Roscommon County, MI, Sanilac County, MI, Tuscola County, MI

The radar

The NCL Michigan radar (KAPX), 78 km from the middle of the area, began a volume at 02:02 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

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 24, 10:03 PM EDTSevere Thunderstorm WarningGRRIsabella, Montcalm77 min
Jun 24, 10:03 PM EDTSevere Thunderstorm WarningGRRClare77 min
Jun 24, 10:13 PM EDTSevere Thunderstorm WarningAPXRoscommon47 min
Jun 24, 10:36 PM EDTSevere Thunderstorm WarningAPXGladwin, Ogemaw44 min
Jun 24, 10:57 PM EDTSevere Thunderstorm WarningDTXMidland63 min
Jun 24, 11:08 PM EDTSevere Thunderstorm WarningAPXArenac57 min
Jun 24, 11:32 PM EDTSevere Thunderstorm WarningAPXAlcona, Iosco93 min
Jun 24, 11:44 PM EDTSevere Thunderstorm WarningDTXBay46 min
Jun 25, 12:04 AM EDTSevere Thunderstorm WarningAPXArenac31 min

The nearest sounding before it

Alpena, MI (KAPX), launched 00:00Z, 2.0 hours before the alert went out and 123 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, Alpena, MI at 00:00Z on 1997-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 294 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, Alpena, MI at 00:00Z on 1997-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.193958Sfc1 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
294 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1662 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.