Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 70, NWS Gaylord, MI

August 12, 2002Charlevoix County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Aug 12, 2002, 5:54 PM EDT for Charlevoix County, Michigan. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 12, 2002, 5:54 PM EDT (21:54 UTC)
Expired: Aug 12, 2002, 6:45 PM EDT
In force: 51 min
Issued by: NWS Gaylord, MI
Area: Counties, with a storm outline in the text

County Charlevoix County, MI

The radar

The NCL Michigan radar (KAPX), 56 km from the middle of the area, began a volume at 21:54 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

Alpena, MI (KAPX), launched 12:00Z, 9.9 hours before the alert went out and 221 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1437 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

299 
WUUS53 KAPX 122154
SVRAPN
MIC029-122245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
554 PM EDT MON AUG 12 2002

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHARLEVOIX COUNTY IN NORTHWEST LOWER MICHIGAN

* UNTIL 645 PM EDT

* AT 549 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES SOUTHWEST OF FISHERMANS ISLAND STATE
  PARK...OR ABOUT 9 MILES WEST OF ELLSWORTH...MOVING NORTHEAST AT
  20 MPH. ADDITIONAL SEVERE THUNDERSTORMS WERE LOCATED OVER EASTERN
  CHARLEVOIX COUNTY NEAR BOYNE CITY. 

* THE SEVERE THUNDERSTORM WILL REACH...
  BOYNE CITY AROUND 600 PM EDT
  FISHERMANS ISLAND STATE PARK AROUND 610 PM EDT
  CHARLEVOIX...IRONTON AROUND 620 PM EDT
  HORTON BAY AROUND 635 PM EDT

REMAIN INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. 
HAIL UP TO 1 INCH IN DIAMETER AND WIND GUSTS TO 60 MPH ARE THE MAIN 
THREATS WITH THESE STORMS.

LAT...LON 4527 8501 4518 8522 4521 8539 4527 8538
          4532 8531 4536 8520 4537 8509

The office that day

Everything else NWS Gaylord, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 5:43 PM EDT	Special Marine Warning	APX		2 hr
Aug 12, 5:43 PM EDT	Special Marine Warning	APX		2 hr
Aug 12, 5:43 PM EDT	Special Marine Warning	APX		2 hr
Aug 12, 6:26 PM EDT	Severe Thunderstorm Warning	APX	Cheboygan, Emmet	64 min
Aug 12, 6:38 PM EDT	Special Marine Warning	APX		112 min
Aug 12, 6:45 PM EDT	Severe Thunderstorm Warning	APX	Presque Isle	60 min
Aug 12, 7:37 PM EDT	Severe Thunderstorm Warning	APX	Gladwin, Ogemaw	53 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2002 Every severe thunderstorm warning in 2002

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.