Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 73, NWS Gaylord, MI

August 12, 2002Gladwin County, Ogemaw County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Aug 12, 2002, 7:37 PM EDT for Gladwin County, Ogemaw County, Michigan. It was in force for 53 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, 7:37 PM EDT (23:37 UTC)
Expired: Aug 12, 2002, 8:30 PM EDT
In force: 53 min
Issued by: NWS Gaylord, MI
Area: Counties, with a storm outline in the text

Counties Gladwin County, MI, Ogemaw County, MI

The radar

The NCL Michigan radar (KAPX), 96 km from the middle of the area, began a volume at 23:39 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

Detroit, MI (KDTX), launched 12:00Z, 11.6 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: 763 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1116 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 17 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.

151 
WUUS53 KAPX 122337
SVRAPN
MIC051-129-130030-

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

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GLADWIN COUNTY IN NORTHEAST LOWER MICHIGAN
  OGEMAW COUNTY IN NORTHEAST LOWER MICHIGAN

* UNTIL 830 PM EDT

* AT 734 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 14 MILES SOUTHWEST OF SKIDWAY LAKE...OR ABOUT 9
  MILES WEST OF ALGER...MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL REACH...
  SKIDWAY LAKE AROUND 805 PM EDT
  SELKIRK AROUND 815 PM EDT
  RIFLE RIVER STATE PARK AROUND 830 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 4399 8427 4412 8443 4450 8389 4421 8388
          4417 8416 4404 8417

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, 6:26 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

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.