Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 48, NWS Gaylord, MI

July 28, 2002Arenac County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 28, 2002, 5:02 AM EDT for Arenac County, Michigan. It was in force for 13 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 28, 2002, 5:02 AM EDT (09:02 UTC)
Expired: Jul 28, 2002, 5:15 AM EDT
In force: 13 min
Issued by: NWS Gaylord, MI
Area: Counties, with a storm outline in the text

County Arenac County, MI

The radar

The NCL Michigan radar (KAPX), 118 km from the middle of the area, began a volume at 09:04 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.

What was reported inside it

Time	Report	Where	Remark
Jul 28, 5:10 AM EDT	Thunderstorm Wind 50 E	Au Gres, MI	Trees down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 9.0 hours before the alert went out and 150 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: 269 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1134 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KAPX 280852
SVRAPN
MIC011-280915-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
452 AM EDT SUN JUL 28 2002

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ARENAC COUNTY IN NORTHEAST LOWER MICHIGAN

* UNTIL 515 AM EDT

* AT 449 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 9 MILES NORTH OF AU GRES TO 5 
  MILES SOUTH OF ALGER...MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORMS WILL REACH...
  STERLING AROUND 500 AM EDT
  OMER AROUND 505 AM EDT
  STANDISH...AU GRES AROUND 510 AM 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. WINDS
THIS HIGH CAN DOWN TREES AND POWER LINES.

LAT...LON 4392 8403 4400 8405 4400 8415 4412 8416
          4416 8403 4416 8361 4405 8357 4405 8363
          4398 8368 4400 8383 4392 8389

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 2:17 AM EDT	Special Marine Warning	APX		58 min
Jul 28, 2:17 AM EDT	Special Marine Warning	APX		58 min
Jul 28, 4:05 AM EDT	Tornado Warning	APX	Ogemaw, Roscommon	25 min
Jul 28, 4:30 AM EDT	Severe Thunderstorm Warning	APX	Ogemaw	15 min
Jul 28, 4:40 AM EDT	Severe Thunderstorm Warning	APX	Iosco	35 min
Jul 28, 4:52 AM EDT	Severe Thunderstorm Warning	APX	Arenac	23 min
Jul 28, 4:55 AM EDT	Special Marine Warning	APX		65 min
Jul 28, 4:55 AM EDT	Special Marine Warning	APX		65 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.