Alert archive / Michigan / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 63, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jun 19, 1998, 12:03 AM EDT for Calhoun County, Michigan. It was in force for 62 min. 3 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
- Jun 19, 1998, 12:03 AM EDT (04:03 UTC)
- Expired
- Jun 19, 1998, 1:05 AM EDT
- In force
- 62 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
County Calhoun County, MI
The radar
The Grand Rapids radar (KGRR), 84 km from the middle of the area, began a volume at 04:03 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 19, 12:24 AM EDT | Thunderstorm Wind | Bedford, MI | Calhoun County Central Dispatch reported power lines downed in Bedford. |
| Jun 19, 12:30 AM EDT | Thunderstorm Wind | Athens, MI | Trees downed along K Drive S. just east of 5 Mile Rd. in Leroy Township, approximately 5 miles northeast of Athens. |
| Jun 19, 12:35 AM EDT | Thunderstorm Wind | Marshall, MI | Trees downed along N Drive N. just east of Old U.S. 27 in Lee Township, approximately 5 miles north of Marshall. |
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 |
|---|---|---|---|
| Jun 18, 8:30 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 12:00 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 4.1 hours before the alert went out and 140 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
- 440 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1528 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 10:39 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Van Buren | 76 min |
| Jun 18, 10:46 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Ottawa | 64 min |
| Jun 18, 11:29 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Kalamazoo, Kent | 61 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; radar from the NEXRAD Level II archive.