Alert archive / Michigan / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 39, NWS Gaylord, MI

July 21, 2002Kalkaska County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 21, 2002, 7:54 AM EDT for Kalkaska County, Michigan. It was in force for 51 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
Jul 21, 2002, 7:54 AM EDT (11:54 UTC)
Expired
Jul 21, 2002, 8:45 AM EDT
In force
51 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), 27 km from the middle of the area, began a volume at 11:58 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 00:00Z, 11.9 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 00:00Z on 2002-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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 2002-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 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
9 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
1903 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
100 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.

126 
WUUS53 KAPX 211154
SVRAPN
MIC079-211245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
753 AM EDT SUN JUL 21 2002

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

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

* UNTIL 845 AM EDT

* AT 748 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM 5 MILES EAST OF RAPID CITY...MOVING
  SOUTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL REACH...
  THE DARRAGH AROUND 815 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 4457 8493 4485 8514 4497 8498 4476 8486
          4461 8486

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 6:00 AM EDTSpecial Marine WarningAPX90 min
Jul 21, 6:00 AM EDTSpecial Marine WarningAPX90 min
Jul 21, 6:00 AM EDTSpecial Marine WarningAPX90 min
Jul 21, 6:29 AM EDTSevere Thunderstorm WarningAPXAntrim, Charlevoix, Leelanau31 min
Jul 21, 8:55 AM EDTSpecial Marine WarningAPX65 min
Jul 21, 8:55 AM EDTSpecial Marine WarningAPX65 min
Jul 21, 12:58 PM EDTSpecial Marine WarningAPX22 min
Jul 21, 3:11 PM EDTSevere Thunderstorm WarningAPXAlpena34 min
Jul 21, 7:33 PM EDTSpecial Marine WarningAPX87 min
Jul 21, 7:33 PM EDTSpecial Marine WarningAPX87 min
Jul 21, 7:39 PM EDTSevere Thunderstorm WarningAPXMackinac51 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; radar from the NEXRAD Level II archive.