Alert archive / Michigan / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 113, NWS Grand Rapids, MI

August 1, 2003Calhoun County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 1, 2003, 5:43 PM EDT for Calhoun County, Michigan. It was in force for 62 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 1, 2003, 5:43 PM EDT (21:43 UTC)
Expired
Aug 1, 2003, 6:45 PM EDT
In force
62 min
Issued by
NWS Grand Rapids, MI
Area
Counties, with a storm outline in the text

County Calhoun County, MI

The radar

The Grand Rapids radar (KGRR), 90 km from the middle of the area, began a volume at 21:43 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 watch it was issued in

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

IssuedProductOfficeLasted
Aug 1, 3:45 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.7 hours before the alert went out and 139 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, Detroit, MI at 12:00Z on 2003-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 212 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, Detroit, MI at 12:00Z on 2003-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
212 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
1092 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

031 
WUUS53 KGRR 012143
SVRGRR
MIC025-012245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
543 PM EDT FRI AUG 1 2003

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN SOUTH CENTRAL MICHIGAN

* UNTIL 645 PM EDT

* AT 538 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHWEST OF BURLINGTON...OR ABOUT 13
  MILES SOUTHWEST OF MARSHALL...MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   TEKONSHA AROUND 550 PM EDT
   MARENGO AROUND 610 PM EDT
   HOMER AROUND 615 PM EDT
   ALBION AROUND 625 PM EDT

LARGE HAIL...DAMAGING WINDS...AND HEAVY RAIN ARE EXPECTED FROM THIS
STORM. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.


LAT...LON 4225 8502 4226 8490 4230 8472 4206 8471
          4207 8520 4221 8521

$$

93 NJJ

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 9:25 AM EDTSpecial Marine WarningGRR80 min
Aug 1, 9:25 AM EDTSpecial Marine WarningGRR80 min
Aug 1, 9:25 AM EDTSpecial Marine WarningGRR80 min
Aug 1, 9:25 AM EDTSpecial Marine WarningGRR80 min
Aug 1, 12:17 PM EDTSevere Thunderstorm WarningGRRGratiot, Montcalm58 min
Aug 1, 12:22 PM EDTSevere Thunderstorm WarningGRRGratiot, Montcalm53 min
Aug 1, 12:39 PM EDTSevere Thunderstorm WarningGRRKalamazoo51 min
Aug 1, 12:59 PM EDTSevere Thunderstorm WarningGRRClinton31 min
Aug 1, 1:01 PM EDTSevere Thunderstorm WarningGRRCalhoun, Eaton59 min
Aug 1, 1:20 PM EDTSevere Thunderstorm WarningGRRIngham55 min
Aug 1, 1:24 PM EDTSevere Thunderstorm WarningGRRClinton36 min
Aug 1, 1:27 PM EDTSevere Thunderstorm WarningGRRKalamazoo33 min
Aug 1, 1:45 PM EDTSevere Thunderstorm WarningGRRJackson75 min
Aug 1, 1:57 PM EDTSevere Thunderstorm WarningGRRCalhoun33 min
Aug 1, 2:13 PM EDTSevere Thunderstorm WarningGRRIngham47 min
Aug 1, 2:25 PM EDTTornado WarningGRRJackson50 min
Aug 1, 4:31 PM EDTSevere Thunderstorm WarningGRRCalhoun59 min
Aug 1, 4:33 PM EDTSevere Thunderstorm WarningGRRKalamazoo57 min
Aug 1, 4:41 PM EDTSevere Thunderstorm WarningGRRJackson64 min
Aug 1, 4:52 PM EDTSevere Thunderstorm WarningGRRKent53 min
Aug 1, 4:58 PM EDTSevere Thunderstorm WarningGRRAllegan47 min
Aug 1, 5:02 PM EDTSevere Thunderstorm WarningGRRVan Buren43 min
Aug 1, 5:10 PM EDTSevere Thunderstorm WarningGRRBarry65 min
Aug 1, 7:38 PM EDTSevere Thunderstorm WarningGRRKalamazoo37 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2003Every severe thunderstorm warning in 2003

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.