Alert archive / Michigan / Flash Flood Watches in 2010

Flash Flood Watch 2, NWS Grand Rapids, MI

June 23, 201015 counties in Michigan

NWS Grand Rapids, MI issued this flash flood watch at Jun 23, 2010, 7:30 AM EDT for 15 counties in Michigan. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Jun 23, 2010, 7:30 AM EDT (11:30 UTC)
Expired: Jun 23, 2010, 11:29 PM EDT
In force: 16 hr
Issued by: NWS Grand Rapids, MI
Flood severity: None

Counties Allegan County, MI, Barry County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Montcalm County, MI, Muskegon County, MI, Ottawa County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 28 km from the middle of the area, began a volume at 11:31 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, 11.5 hours before the alert went out and 299 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 687 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 1384 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Jun 23, 4:28 AM EDT, 3 hours 2 minutes earlier.

Area forecast discussion, Jun 23, 4:28 AM EDT, 3 hours 2 minutes before

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Hazardous weather outlook, Jun 23, 4:09 AM EDT, 3 hours 21 minutes before

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In the hours before

Special weather statement, Jun 23, 7:06 AM EDT, 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 7:01 AM EDT	Special Marine Warning	GRR		89 min
Jun 23, 7:06 AM EDT	Special Weather Statement	GRR	Allegan, Kent, Muskegon, Newaygo, Oceana, Ottawa	54 min
Jun 23, 7:21 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kent, Muskegon, Newaygo, Oceana, Ottawa	54 min
Jun 23, 7:57 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	63 min
Jun 23, 8:06 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Kalamazoo, Van Buren	54 min
Jun 23, 8:15 AM EDT	Special Weather Statement	GRR	Kent, Mecosta, Montcalm, Newaygo	75 min
Jun 23, 8:24 AM EDT	Special Marine Warning	GRR		51 min
Jun 23, 8:50 AM EDT	Special Weather Statement	GRR	Barry, Calhoun, Eaton, Kalamazoo	55 min
Jun 23, 9:29 AM EDT	Special Weather Statement	GRR	Calhoun, Clinton, Eaton, Ingham, Jackson	61 min
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Ionia	11 hr
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Ingham	11 hr
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Barry	49 hr
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Allegan	5 days
Jun 23, 10:05 AM EDT	River Flood Advisory	GRR	Kalamazoo	3 days
Jun 23, 10:15 AM EDT	Special Weather Statement	GRR	Jackson	60 min
Jun 23, 1:47 PM EDT	Small Craft Advisory	GRR		21 hr
Jun 23, 7:21 PM EDT	Special Marine Warning	GRR		84 min

Nearby

Flash Flood Watches in Michigan, 2010 Every flash flood watch in 2010

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.