Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 61, NWS Gaylord, MI

July 31, 2002Mackinac County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 31, 2002, 5:36 PM EDT for Mackinac County, Michigan. It was in force for 84 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 31, 2002, 5:36 PM EDT (21:36 UTC)
Expired
Jul 31, 2002, 7:00 PM EDT
In force
84 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Mackinac County, MI

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 31, 4:00 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 9.6 hours before the alert went out and 205 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 12:00Z on 2002-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 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 12:00Z on 2002-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 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
24 J/kg
Mixed-layer CIN
-393 J/kg
Mixed-layer LCL
1620 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
124 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.

977 
WUUS53 KAPX 312136
SVRAPN
MIC097-312300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
534 PM EDT WED JUL 31 2002

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACKINAC COUNTY IN EASTERN UPPER MICHIGAN

* UNTIL 700 PM EDT

* AT 532 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A LINE OF SEVERE THUNDERSTORMS FROM 23 MILES SOUTH OF GRAND   
  MARAIS TO 5 MILES SOUTHEAST OF MANISTIQUE...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORMS WILL REACH...
  GOULD CITY...CURTIS AROUND 555 PM EDT
  ENGADINE AROUND 605 PM EDT
  NAUBINWAY AROUND 610 PM EDT
  GARNET AROUND 620 PM EDT
  EPOUFETTE AROUND 625 PM EDT
  ST IGNACE AND THE MACKINAC BRIDGE AROUND 645 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 10:24 PM EDTSpecial Marine WarningAPX51 min
Jul 30, 11:08 PM EDTSpecial Marine WarningAPX67 min
Jul 30, 11:08 PM EDTSpecial Marine WarningAPX67 min
Jul 30, 11:08 PM EDTSpecial Marine WarningAPX67 min
Jul 30, 11:17 PM EDTSevere Thunderstorm WarningAPXBenzie, Manistee28 min
Jul 30, 11:35 PM EDTSevere Thunderstorm WarningAPXLeelanau25 min
Jul 30, 11:43 PM EDTSevere Thunderstorm WarningAPXAntrim, Grand Traverse47 min
Jul 30, 11:47 PM EDTSevere Thunderstorm WarningAPXBenzie, Manistee, Wexford43 min
Jul 31, 12:01 AM EDTSevere Thunderstorm WarningAPXKalkaska44 min
Jul 31, 12:32 AM EDTSevere Thunderstorm WarningAPXAntrim, Grand Traverse58 min
Jul 31, 12:41 AM EDTSevere Thunderstorm WarningAPXKalkaska49 min
Jul 31, 12:57 AM EDTSevere Thunderstorm WarningAPXRoscommon48 min
Jul 31, 1:10 AM EDTSevere Thunderstorm WarningAPXOgemaw50 min
Jul 31, 1:13 AM EDTSevere Thunderstorm WarningAPXOscoda32 min
Jul 31, 1:37 AM EDTSpecial Marine WarningAPX83 min
Jul 31, 1:37 AM EDTSpecial Marine WarningAPX83 min
Jul 31, 3:32 PM EDTSpecial Marine WarningAPX58 min
Jul 31, 5:19 PM EDTSpecial Marine WarningAPX101 min
Jul 31, 5:19 PM EDTSpecial Marine WarningAPX101 min
Jul 31, 6:50 PM EDTSpecial Marine WarningAPX85 min
Jul 31, 7:04 PM EDTSpecial Marine WarningAPX86 min
Jul 31, 7:04 PM EDTSpecial Marine WarningAPX86 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2002Every 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.