Alert archive / Iowa / Flash Flood Watches in 2006

Flash Flood Watch 1, NWS Quad Cities, IA

September 10, 2006Buchanan County, Delaware County, Dubuque County, Iowa

NWS Quad Cities, IA issued this flash flood watch at Sep 10, 2006, 7:50 PM CDT for Buchanan County, Delaware County, Dubuque County, Iowa. It took effect at Sep 10, 2006, 10:00 PM CDT. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Sep 10, 2006, 7:50 PM CDT (00:50 UTC)
In effect from: Sep 10, 2006, 10:00 PM CDT
Expired: Sep 11, 2006, 4:00 PM CDT
In force: 18 hr
Issued by: NWS Quad Cities, IA
Flood severity: None

Counties Buchanan County, IA, Delaware County, IA, Dubuque County, IA

The radar

The Quad Cities radar (KDVN), 115 km from the middle of the area, began a volume at 00:51 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

Davenport, (KDVN), launched 00:00Z, 0.8 hours before the alert went out and 118 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: 16 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 496 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Quad Cities, IA wrote its last area forecast discussion before this flash flood watch went out at Sep 10, 7:12 PM CDT, 38 minutes earlier.

Area forecast discussion, Sep 10, 7:12 PM CDT, 38 minutes before

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Hazardous weather outlook, Sep 10, 3:52 PM CDT, 3 hours 58 minutes before

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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 Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 11, 3:02 PM CDT	Severe Thunderstorm Warning	DVN	Lee	42 min
Sep 11, 4:24 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	36 min
Sep 11, 6:17 PM CDT	Flash Flood Warning	DVN	McDonough	6 hr

Nearby

Flash Flood Watches in Iowa, 2006 Every flash flood watch in 2006

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.