Alert archive / Michigan / Areal Flood Advisories in 2014

Areal Flood Advisory 21, NWS Grand Rapids, MI

July 13, 2014Kent County, Muskegon County, Ottawa County, Michigan

NWS Grand Rapids, MI issued this areal flood advisory at Jul 13, 2014, 12:06 AM EDT for Kent County, Muskegon County, Ottawa County, Michigan. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Jul 13, 2014, 12:06 AM EDT (04:06 UTC)
Expired
Jul 13, 2014, 10:00 AM EDT
In force
10 hr
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon

Counties Kent County, MI, Muskegon County, MI, Ottawa County, MI

The radar

The Grand Rapids radar (KGRR), 41 km from the middle of the area, began a volume at 04:06 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, 4.1 hours before the alert went out and 230 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 2014-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 540 joules per kilogram.LCLLFCEL10008507005003002001001 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 2014-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
540 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1000 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 11:32 PM EDTSpecial Marine WarningGRR118 min
Jul 13, 12:24 AM EDTSpecial Weather StatementGRRIonia66 min
Jul 13, 12:59 AM EDTSpecial Weather StatementGRRMontcalm61 min
Jul 13, 1:48 AM EDTAreal Flood AdvisoryGRRClinton, Gratiot, Ionia, Montcalm8 hr
Jul 13, 2:01 AM EDTSpecial Weather StatementGRRAllegan, Barry, Ionia, Kalamazoo, Van Buren59 min
Jul 13, 3:44 AM EDTRiver Flood AdvisoryGRRIonia4 days

Nearby

Areal Flood Advisories in Michigan, 2014Every areal flood advisory in 2014

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.