Alert archive / Michigan / Flood Watches in 2017

Flood Watch 3, NWS Grand Rapids, MI

July 12, 201712 counties in Michigan

NWS Grand Rapids, MI issued this flood watch at Jul 12, 2017, 1:09 AM EDT for 12 counties in Michigan. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Jul 12, 2017, 1:09 AM EDT (05:09 UTC)
Expired: Jul 13, 2017, 5:47 AM EDT
In force: 29 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, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Ottawa County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 40 km from the middle of the area, began a volume at 05:09 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, 5.2 hours before the alert went out and 310 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: 643 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1366 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this 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 flood watch went out at Jul 11, 11:41 PM EDT, 1 hour 28 minutes earlier.

Area forecast discussion, Jul 11, 11:41 PM EDT, 1 hour 28 minutes before

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Hazardous weather outlook, Jul 11, 11:25 AM EDT, 13 hours 44 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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
Jul 12, 1:59 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	31 min
Jul 12, 6:07 AM EDT	Special Weather Statement	GRR	Allegan, Kalamazoo, Van Buren	53 min
Jul 12, 8:42 AM EDT	Special Marine Warning	GRR		2 hr
Jul 12, 9:03 AM EDT	Special Marine Warning	GRR		87 min
Jul 12, 9:14 AM EDT	Special Weather Statement	GRR	Mason, Oceana	91 min
Jul 12, 9:22 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	83 min
Jul 12, 9:59 AM EDT	Severe Thunderstorm Warning	GRR	Allegan	18 min
Jul 12, 10:23 AM EDT	Special Marine Warning	GRR		112 min
Jul 12, 11:09 AM EDT	Special Weather Statement	GRR	Ingham	51 min
Jul 12, 11:17 AM EDT	Special Weather Statement	GRR	Allegan, Van Buren	58 min
Jul 12, 11:22 AM EDT	Areal Flood Advisory	GRR	Ingham	6 hr
Jul 12, 11:45 AM EDT	Special Weather Statement	GRR	Jackson	90 min
Jul 12, 12:13 PM EDT	Special Weather Statement	GRR	Calhoun, Kalamazoo	92 min

Nearby

Flood Watches in Michigan, 2017 Every flood watch in 2017

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.