Alert archive / Michigan / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 9, NWS Grand Rapids, MI

May 13, 2009Oceana County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at May 13, 2009, 10:55 PM EDT for Oceana County, Michigan. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 13, 2009, 10:55 PM EDT (02:55 UTC)
Expired
May 13, 2009, 11:20 PM EDT
In force
25 min
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon

County Oceana County, MI

The radar

The Grand Rapids radar (KGRR), 108 km from the middle of the area, began a volume at 02:55 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.9 hours before the alert went out and 168 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, Green Bay/Straub, WI at 00:00Z on 2009-05-14Temperature 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, Green Bay/Straub, WI at 00:00Z on 2009-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
443 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
64 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
May 13, 9:58 PM EDTRiver Flood AdvisoryGRRIonia5 days
May 13, 9:58 PM EDTRiver Flood AdvisoryGRRClinton24 hr
May 13, 9:58 PM EDTRiver Flood AdvisoryGRRMason5 days
May 13, 10:28 PM EDTSpecial Marine WarningGRR2 hr
May 13, 10:47 PM EDTSpecial Weather StatementGRRLake, Muskegon, Newaygo, Oceana73 min
May 13, 11:18 PM EDTAreal Flood AdvisoryGRRClinton, Gratiot, Ionia, Kent, Montcalm, Muskegon and 2 more87 days
May 13, 11:36 PM EDTSpecial Weather StatementGRRClare, Isabella, Mecosta, Muskegon, Newaygo, Oceana and 1 more84 min
May 13, 11:39 PM EDTSpecial Marine WarningGRR96 min
May 13, 11:54 PM EDTSpecial Weather StatementGRRAllegan, Barry, Calhoun, Clinton, Eaton, Gratiot and 7 more66 min
May 14, 12:48 AM EDTSpecial Weather StatementGRRBarry, Kalamazoo72 min
May 14, 1:08 AM EDTSpecial Weather StatementGRRAllegan52 min
May 14, 1:23 AM EDTSpecial Weather StatementGRRBarry, Calhoun, Clinton, Eaton, Ingham, Jackson and 1 more97 min
May 14, 2:38 AM EDTSpecial Weather StatementGRRAllegan, Barry, Ionia, Isabella, Kalamazoo, Kent and 2 more82 min
May 14, 2:43 AM EDTSpecial Weather StatementGRRJackson62 min
May 14, 10:13 AM EDTRiver Flood AdvisoryGRRIngham3 days
May 14, 10:13 AM EDTRiver Flood AdvisoryGRRMuskegon37 hr

Nearby

Severe Thunderstorm Warnings in Michigan, 2009Every severe thunderstorm 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.