Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 55, NWS Gaylord, MI

July 31, 2002Kalkaska County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 31, 2002, 12:01 AM EDT for Kalkaska County, Michigan. It was in force for 44 min. 2 reports 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 31, 2002, 12:01 AM EDT (04:01 UTC)
Expired
Jul 31, 2002, 12:45 AM EDT
In force
44 min
Issued by
NWS Gaylord, MI
Area
Counties, with a storm outline in the text

County Kalkaska County, MI

The radar

The NCL Michigan radar (KAPX), 43 km from the middle of the area, began a volume at 04:07 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

TimeReportWhereRemark
Jul 31, 12:25 AM EDTThunderstorm Wind 50 EKalkaska, MISeveral trees down.
Jul 31, 12:45 AM EDTThunderstorm Wind 50 ESouth Boardman, MIA few 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

Alpena, MI (KAPX), launched 00:00Z, 4.0 hours before the alert went out and 216 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 00:00Z on 2002-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 595 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 00:00Z on 2002-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
595 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1890 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

466 
WUUS53 KAPX 310401
SVRAPN
MIC079-310445-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
1201 AM EDT WED JUL 31 2002

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

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

* UNTIL 1245 AM EDT

* AT 1157 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES EAST OF TRAVERSE CITY...MOVING EAST AT 
  80 MPH.

* THE SEVERE THUNDERSTORM WILL REACH...
  SIGMA...SHARON AROUND 1210 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 4451 8500 4462 8533 4481 8532 4469 8486
          4451 8486

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, 12:32 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, 5:36 PM EDTSevere Thunderstorm WarningAPXMackinac84 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.