Alert archive / Michigan / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 32, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at May 29, 1998, 2:33 AM EDT for Clinton County, Michigan. It was in force for 62 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, 2:33 AM EDT (06:33 UTC)
- Expired
- May 29, 1998, 3:35 AM EDT
- In force
- 62 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
County Clinton County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 29, 2:45 AM EDT | Thunderstorm Wind | Eureka, MI | Several large tree branches downed in Eureka. |
| May 29, 2:45 AM EDT | Thunderstorm Wind 52 | St Johns, MI | Large tree downed in St. Johns. A trained spotter reported a 60 mph wind gust as measured by his local anemometer. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 29, 2:15 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 6.6 hours before the alert went out and 99 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 53 minutes earlier.
Area forecast discussion, May 28, 9:40 PM EDT, 4 hours 53 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, 2:07 AM EDT | Severe Thunderstorm Warning | GRR | Kent, Newaygo | 33 min |
| May 29, 2:33 AM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella | 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.