Alert archive / Michigan / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 30, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at May 29, 1998, 2:07 AM EDT for Kent County, Newaygo County, Michigan. It was in force for 33 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 29, 1998, 2:07 AM EDT (06:07 UTC)
- Expired
- May 29, 1998, 2:40 AM EDT
- In force
- 33 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
Counties Kent County, MI, Newaygo County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 29, 2:10 AM EDT | Thunderstorm Wind 56 | Grant, MI | Several trees and power lines downed in the city of Grant and Grant Township. Trees were blown down across Michigan Highway 37. A trained weather spotter reported a 65 mph wind gust as measured by his local anemometer. |
| May 29, 2:30 AM EDT | Thunderstorm Wind | Sparta, MI | Several small trees downed near Indian Lakes in Algoma Township. |
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
Detroit, MI (KDTX), launched 00:00Z, 6.1 hours before the alert went out and 193 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.
- Mixed-layer CAPE
- 1857 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 1175 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 May 28, 9:40 PM EDT, 4 hours 27 minutes earlier.
Area forecast discussion, May 28, 9:40 PM EDT, 4 hours 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND RAPIDS MI 940 PM EDT THU MAY 28 1998 IR LOOP/KMKX-88D SHOWS MCS DEVELOPING AND MOVG EAST AHEAD OF SOUTHWARD SAGGING COLD FRONT THAT STRETCHES FROM NEAR GRB TO JUST NORTH OF DSM. LIS FROM NRN IA THROUGH NRN IL/SRN WI AND WRN LOWER MI ARE IN THE -9 TO -13 RANGE AND CAPES ARE IN THE 2500-4000 J/KG RANGE. MOISTURE CONTINUES TO POOL ALONG AND AHEAD OF THE FRONT WHICH SHOULD PROVIDE ENERGY FOR ITS CONTINUED MOVEMENT. IR LOOP DOES INDICATE SOME SOUTHWARD SAG TO THE MCS AS THE COLDEST TOPS HAVE NOW SHIFTED SLIGHTLY SOUTH. AT ANY RATE, WITH MID LEVEL WIND GENERALLY FROM THE WEST, WE SEE NO REASON WHY THIS MCS WOULD NOT MOVE INTO SW LOWER. SO, WE WILL BOOST THE POPS ACROSS PORTIONS OF THE FA ACCORDINGLY.
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 12:55 AM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Ottawa | 50 min |
| May 29, 12:55 AM EDT | Severe Thunderstorm Warning | GRR | Allegan, Van Buren | 50 min |
| May 29, 1:18 AM EDT | Severe Thunderstorm Warning | GRR | Barry, Kent, Newaygo | 47 min |
| May 29, 1:18 AM EDT | Severe Thunderstorm Warning | GRR | Kalamazoo | 47 min |
| May 29, 1:18 AM EDT | Severe Thunderstorm Warning | GRR | Lake | 47 min |
| May 29, 1:35 AM EDT | Severe Thunderstorm Warning | GRR | Eaton, Ionia, Montcalm | 75 min |
| May 29, 1:35 AM EDT | Severe Thunderstorm Warning | GRR | Mecosta, Osceola | 75 min |
| May 29, 1:35 AM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 75 min |
| May 29, 2:33 AM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella | 62 min |
| May 29, 2:33 AM EDT | Severe Thunderstorm Warning | GRR | Clinton | 62 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1998Every severe thunderstorm warning in 1998
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.