Alert archive / Iowa / Flood Watches in 2008

Flood Watch 4, NWS Quad Cities, IA

March 30, 200813 counties in Iowa; 5 counties in Illinois

NWS Quad Cities, IA issued this flood watch at Mar 30, 2008, 3:38 AM CDT for 13 counties in Iowa; 5 counties in Illinois. It took effect at Mar 31, 2008, 1:00 AM CDT. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Mar 30, 2008, 3:38 AM CDT (08:38 UTC)
In effect from: Mar 31, 2008, 1:00 AM CDT
Expired: Mar 31, 2008, 8:01 PM CDT
In force: 19 hr
Issued by: NWS Quad Cities, IA
Flood severity: None

Counties Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Muscatine County, IA, Scott County, IA, Carroll County, IL, Jo Daviess County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 52 km from the middle of the area, began a volume at 08:39 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, 8.6 hours before the alert went out and 359 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2049 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Quad Cities, IA wrote its last area forecast discussion before this flood watch went out at Mar 30, 3:30 AM CDT, 8 minutes earlier.

Area forecast discussion, Mar 30, 3:30 AM CDT, 8 minutes before

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Nearby

Flood Watches in Iowa, 2008 Flood Watches in Illinois, 2008 Every flood watch in 2008

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.