Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 71, NWS Gaylord, MI

August 12, 2002Cheboygan County, Emmet County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Aug 12, 2002, 6:26 PM EDT for Cheboygan County, Emmet County, Michigan. It was in force for 64 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, 6:26 PM EDT (22:26 UTC)
Expired: Aug 12, 2002, 7:30 PM EDT
In force: 64 min
Issued by: NWS Gaylord, MI
Area: Counties, with a storm outline in the text

Counties Cheboygan County, MI, Emmet County, MI

The radar

The NCL Michigan radar (KAPX), 68 km from the middle of the area, began a volume at 22:29 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, 10.4 hours before the alert went out and 169 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.

648 
WUUS53 KAPX 122226
SVRAPN
MIC031-047-122330-

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

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHEBOYGAN COUNTY IN NORTHEAST LOWER MICHIGAN
  EMMET COUNTY IN NORTHWEST LOWER MICHIGAN

* UNTIL 730 PM EDT

* AT 624 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM ALANSON TO 5 MILES SOUTHWEST 
  OF AFTON...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORMS WILL REACH...
  BRUTUS...PELLSTON...INDIAN RIVER AROUND 630 PM EDT
  LEVERING...CARP LAKE...AFTON AROUND 635 PM EDT
  TOPINABEE AROUND 640 PM EDT
  RIGGSVILLE...TOWER AROUND 645 PM EDT
  MULLET LAKE AROUND 650 PM EDT

REMAIN INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. THIS
STORM IS CAPABLE OF PRODUCING WIND GUSTS BETWEEN 60 AND 80 MPH ALONG
WITH DIME SIZED OR LARGER HAIL. WINDS THIS HIGH CAN DOWN TREES AND
POWER LINES.

LAT...LON 4563 8421 4563 8424 4521 8425 4521 8471
          4528 8473 4529 8481 4575 8481 4565 8447
          4566 8429

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, 5:54 PM EDT	Severe Thunderstorm Warning	APX	Charlevoix	51 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.