Alert archive / Michigan / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 84, NWS Grand Rapids, MI

June 9, 2004Muskegon County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 9, 2004, 2:02 AM EDT for Muskegon County, Michigan. It was in force for 28 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: Jun 9, 2004, 2:02 AM EDT (06:02 UTC)
Expired: Jun 9, 2004, 2:30 AM EDT
In force: 28 min
Issued by: NWS Grand Rapids, MI
Area: Counties, with a storm outline in the text

County Muskegon County, MI

The radar

The Grand Rapids radar (KGRR), 56 km from the middle of the area, began a volume at 06:04 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.0 hours before the alert went out and 215 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: 2790 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

217 
WUUS53 KGRR 090602
SVRGRR
MIC121-090630-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
202 AM EDT WED JUN 9 2004

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MUSKEGON COUNTY IN WEST CENTRAL MICHIGAN

* UNTIL 230 AM EDT

* AT 200 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHWEST OF MOORLAND...OR ABOUT 11
  MILES EAST OF MUSKEGON...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TRENT AROUND 210 AM EDT

HAIL UP TO THREE-QUARTERS OF AN INCH IN DIAMETER AND WINDS GREATER
THAN 60 MILES AN HOUR 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 4336 8605 4330 8604 4330 8582 4324 8584
          4313 8602 4325 8619

$$

NJJ

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 8, 8:00 PM EDT, 6 hours 2 minutes earlier.

Area forecast discussion, Jun 8, 8:00 PM EDT, 6 hours 2 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
800 PM EDT TUE JUN 8 2004

.UPDATED...
DOING A QUICK UPDATE TO BRING THE SHOWERS AND THUNDERSTORMS FARTHER
SOUTH FASTER TONIGHT. WHILE THE CONVECTION BETWEEN MKG AND GRB HAS
WEAKENED AS IT MOVED OVER LAKE MICHIGAN THIS EVENING...MORE
CONVECTION HAS DEVELOPED NEAR TVC SOUTHWEST TO NEAR MTW WI.
MEANWHILE THE SHORTWAVE MOVE MO CONTINUES TO MOVE NE TOWARD SW LOWER
MICHIGAN.  THIS HAS HELPED THUNDERSTORMS FORM BETWEEN CHI AND MKE.
THE RUC SHOWS THIS AREA BECOMING MORE EXTENSIVE OVER CNTL LOWER MI
BEFORE MIDNIGHT. WHILE THE SHEAR PROFILE DOES NOT SUPPORT SEVERE
WEATHER... IT SURE LOOKS LIKE SHOWERS AND THUNDERSTORM WILL BE
GENEROUSLY SCATTERED AROUND BY 10 PM NORTH OF GRR. GIVEN PWAT VALUES
OVER 1 1/2 INCHES...ANY OF THESE COULD PRODUCE VERY HEAVY RAIN.
HOWEVER WITH THEM MOVING NE AROUND 30 MPH...FLOODING SHOULD NOT BE A
BIG ISSUE EITHER.

&&

.GRR...NONE

&&

WDM

Hazardous weather outlook, Jun 8, 8:56 PM EDT, 5 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
856 PM EDT TUE JUN 8 2004

MIZ037>040-043>046-050>052-056>059-064>067-071>074-091000-
ALLEGAN-BARRY-CALHOUN-CLARE-CLINTON-EATON-GRATIOT-INGHAM-IONIA-
ISABELLA-JACKSON-KALAMAZOO-KENT-LAKE-MASON-MECOSTA-MONTCALM-MUSKEGON-
NEWAYGO-OCEANA-OSCEOLA-OTTAWA-VAN BUREN-
856 PM EDT TUE JUN 8 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER
MICHIGAN.

.DAY ONE...TONIGHT

SHOWERS AND THUNDERSTORMS OVER EASTERN WISCONSIN ARE EXPECTED TO
MOVE SLOWLY SOUTHEAST OVER AREAS NORTH OF INTERSTATE 96 LATER
THIS EVENING. INDIVIDUAL STORMS WILL BE MOVING NORTHEAST AROUND 30
MPH. BRIEF HEAVY RAINFALL AND FREQUENT CLOUD TO GROUND LIGHTNING
WILL BE POSSIBLE AS THESE STORMS MOVE THROUGH THE AREA. SOME SMALL
HAIL WILL ALSO BE POSSIBLE WITH THESE THUNDERSTORMS. OVERNIGHT...
SOME OF THESE STORMS COULD REACH AS FAR SOUTH AS INTERSTATE 94.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

STRONG TO SEVERE STORMS WILL BE POSSIBLE WEDNESDAY AND WEDNESDAY
NIGHT OVER THE SOUTHWEST QUARTER OF LOWER MICHIGAN AS THE COLD FRONT
PUSHES THROUGH THE AREA. STORMS ARE ALSO IN THE FORECAST EACH DAY
FROM THURSDAY THROUGH MONDAY. AN ACTIVE WEATHER PATTERN WILL BE IN
PLACE RIGHT THROUGH THE UPCOMING WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE OVERNIGHT TONIGHT AND ON WEDNESDAY.

WDM NJJ

In the hours before

Local storm report, Jun 9, 1:59 AM EDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
159 AM EDT WED JUN 09 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0125 AM     TSTM WND GST     MUSKEGON                43.23N 86.26W
06/09/2004  60 MPH           MUSKEGON           MI   TRAINED SPOTTER

&&

RJD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 12:57 AM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Montcalm, Newaygo	63 min
Jun 9, 1:12 AM EDT	Severe Thunderstorm Warning	GRR	Muskegon	48 min
Jun 9, 3:27 AM EDT	Special Marine Warning	GRR		78 min
Jun 9, 3:27 AM EDT	Special Marine Warning	GRR		78 min
Jun 9, 3:42 AM EDT	Severe Thunderstorm Warning	GRR	Mason	63 min
Jun 9, 12:45 PM EDT	Severe Thunderstorm Warning	GRR	Eaton	60 min
Jun 9, 12:56 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	34 min
Jun 9, 1:17 PM EDT	Severe Thunderstorm Warning	GRR	Ingham	28 min
Jun 9, 1:21 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	54 min
Jun 9, 1:39 PM EDT	Tornado Warning	GRR	Jackson	36 min
Jun 9, 1:42 PM EDT	Severe Thunderstorm Warning	GRR	Ingham	33 min
Jun 9, 2:31 PM EDT	Tornado Warning	GRR	Gratiot	44 min
Jun 9, 3:38 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot	37 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2004 Every severe thunderstorm warning in 2004

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.