Alert archive / Michigan / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 13, NWS Grand Rapids, MI

May 1, 2003Barry County, Kalamazoo County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at May 1, 2003, 12:11 AM EDT for Barry County, Kalamazoo County, Michigan. It was in force for 34 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: May 1, 2003, 12:11 AM EDT (04:11 UTC)
Expired: May 1, 2003, 12:45 AM EDT
In force: 34 min
Issued by: NWS Grand Rapids, MI
Area: Counties, with a storm outline in the text

Counties Barry County, MI, Kalamazoo County, MI

The radar

The Grand Rapids radar (KGRR), 45 km from the middle of the area, began a volume at 04:13 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

Detroit, MI (KDTX), launched 00:00Z, 4.2 hours before the alert went out and 173 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 342 m²/s²
0-3 km storm-relative helicity: 394 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.

495 
WUUS53 KGRR 010411
SVRGRR
MIC015-077-010445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1211 AM EDT THU MAY 1 2003

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BARRY COUNTY IN SOUTHWEST MICHIGAN
  KALAMAZOO COUNTY IN SOUTHWEST MICHIGAN

* UNTIL 1245 AM EDT

* AT 1208 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHWEST OF RICHLAND...OR ABOUT 8
  MILES NORTH OF EASTWOOD...MOVING NORTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   DELTON AROUND 1220 AM EDT
   ORANGEVILLE AROUND 1225 AM EDT
   IRVING AROUND 1240 AM EDT
   MIDDLEVILLE AROUND 1245 AM EDT

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

HAIL UP TO THREE-QUARTERS OF AN INCH IN DIAMETER...OR ROUGHLY THE
SIZE OF A DIME...IS EXPECTED FROM THIS STORM. SEEK SHELTER IN A
STURDY STRUCTURE UNTIL THE STORM HAS PASSED.


LAT...LON 4241 8562 4243 8554 4276 8555 4274 8529
          4233 8539 4235 8562

$$

MJS JKL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 11:03 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	42 min
Apr 30, 11:17 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	58 min
Apr 30, 11:46 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	29 min
Apr 30, 11:54 PM EDT	Severe Thunderstorm Warning	GRR	Allegan	36 min
May 1, 12:43 AM EDT	Special Marine Warning	GRR		2 hr
May 1, 12:43 AM EDT	Special Marine Warning	GRR		2 hr
May 1, 12:43 AM EDT	Special Marine Warning	GRR		2 hr
May 1, 12:43 AM EDT	Special Marine Warning	GRR		2 hr

Nearby

Severe Thunderstorm Warnings in Michigan, 2003 Every 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.