Alert archive / Michigan / Winter Storm Watches in 2011

Winter Storm Watch 3, NWS Grand Rapids, MI

February 24, 2011Calhoun County, Jackson County, Kalamazoo County, Michigan

NWS Grand Rapids, MI issued this winter storm watch at Feb 24, 2011, 4:14 AM EST for Calhoun County, Jackson County, Kalamazoo County, Michigan. It took effect at Feb 24, 2011, 11:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Feb 24, 2011, 4:14 AM EST (09:14 UTC)
In effect from
Feb 24, 2011, 11:00 PM EST
Expired
Feb 24, 2011, 4:14 PM EST
In force
Issued by
NWS Grand Rapids, MI

Counties Calhoun County, MI, Jackson County, MI, Kalamazoo County, MI

The radar

The Grand Rapids radar (KGRR), 85 km from the middle of the area, began a volume at 09:19 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 00:00Z, 9.2 hours before the alert went out and 329 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2011-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2011-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 213 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1213 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
213 m²/s²
0-3 km storm-relative helicity
288 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 23, 10:50 PM ESTSpecial Weather StatementGRRBarry, Clinton, Eaton, Gratiot, Ionia, Kalamazoo and 1 more115 min
Feb 23, 11:49 PM ESTSpecial Weather StatementGRRClinton, Eaton, Ingham, Ionia71 min
Feb 24, 7:45 AM ESTSpecial Weather StatementGRRAllegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 8 more2 hr
Feb 24, 9:23 AM ESTRiver Flood AdvisoryGRRClinton13 hr
Feb 24, 4:04 PM ESTSmall Craft AdvisoryGRR24 hr
Feb 24, 4:14 PM ESTWinter Weather AdvisoryGRRBarry, Calhoun, Eaton, Ingham, Jackson, Kalamazoo and 1 more18 hr

Nearby

Winter Storm Watches in Michigan, 2011Every winter storm watch in 2011

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.