Alert archive / Michigan / Flood Watches in 2011
Flood Watch 2, NWS Detroit, MI
NWS Detroit, MI issued this flood watch at May 25, 2011, 9:43 AM EDT for 17 counties in Michigan. It was in force for 30 hr.
The area
The counties it named.
The facts
- Issued
- May 25, 2011, 9:43 AM EDT (13:43 UTC)
- Expired
- May 26, 2011, 3:50 PM EDT
- In force
- 30 hr
- Issued by
- NWS Detroit, MI
- Flood severity
- None
Counties Bay County, MI, Genesee County, MI, Huron County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Midland County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI
The radar
The Detroit radar (KDTX), 26 km from the middle of the area, began a volume at 13:42 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
Detroit, MI (KDTX), launched 12:00Z, 1.7 hours before the alert went out and 25 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 234 m²/s²
- 0-3 km storm-relative helicity
- 255 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 Detroit, MI wrote its last area forecast discussion before this flood watch went out at May 25, 7:03 AM EDT, 2 hours 40 minutes earlier.
Area forecast discussion, May 25, 7:03 AM EDT, 2 hours 40 minutes before
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</html>Hazardous weather outlook, May 25, 5:42 AM EDT, 4 hours 1 minute before
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</html>The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 3:52 AM EDT | Small Craft Advisory | DTX | 64 hr | |
| May 25, 11:34 AM EDT | Areal Flood Warning | DTX | Lenawee, Livingston, Macomb, Monroe, Oakland, Saint Clair and 2 more | 36 hr |
| May 25, 4:39 PM EDT | River Flood Warning | DTX | Wayne | 64 hr |
| May 25, 4:39 PM EDT | River Flood Warning | DTX | Wayne | 48 hr |
| May 25, 4:39 PM EDT | River Flood Warning | DTX | Macomb | 40 hr |
Nearby
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.