Alert archive / Michigan / Winter Storm Warnings in 2009
Winter Storm Warning 6, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this winter storm warning at Apr 5, 2009, 3:32 PM EDT for 4 counties in Michigan. It took effect at Apr 5, 2009, 10:00 PM EDT. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 5, 2009, 3:32 PM EDT (19:32 UTC)
- In effect from
- Apr 5, 2009, 10:00 PM EDT
- Expired
- Apr 6, 2009, 10:18 AM EDT
- In force
- 12 hr
- Issued by
- NWS Grand Rapids, MI
Counties Calhoun County, MI, Eaton County, MI, Ingham County, MI, Jackson County, MI
The radar
The Grand Rapids radar (KGRR), 89 km from the middle of the area, began a volume at 19:35 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.5 hours before the alert went out and 340 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1989 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 214 m²/s²
- 0-3 km storm-relative helicity
- 258 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm 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 winter storm warning went out at Apr 5, 1:00 PM EDT, 2 hours 32 minutes earlier.
Area forecast discussion, Apr 5, 1:00 PM EDT, 2 hours 32 minutes before
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</html>The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 10:33 PM EDT | Winter Storm Watch | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 3 more | 17 hr |
| Apr 5, 3:32 PM EDT | Winter Weather Advisory | GRR | Allegan, Barry, Clinton, Ionia, Kalamazoo, Van Buren | 19 hr |
Nearby
Winter Storm Warnings in Michigan, 2009Every winter storm warning in 2009
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.