Alert archive / Illinois / Flash Flood Watches in 2008

Flash Flood Watch 2, NWS Quad Cities, IA

March 3, 2008Henry County, Rock Island County, Whiteside County, Illinois

NWS Quad Cities, IA issued this flash flood watch at Mar 3, 2008, 10:45 AM CST for Henry County, Rock Island County, Whiteside County, Illinois. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Mar 3, 2008, 10:45 AM CST (16:45 UTC)
Expired: Mar 4, 2008, 3:16 PM CST
In force: 29 hr
Issued by: NWS Quad Cities, IA
Flood severity: None

Counties Henry County, IL, Rock Island County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 33 km from the middle of the area, began a volume at 16:50 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

Lincoln, IL (KILX), launched 12:00Z, 4.8 hours before the alert went out and 204 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: 424 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 331 m²/s²
0-3 km storm-relative helicity: 381 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 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 Mar 3, 10:30 AM CST, 15 minutes earlier.

Area forecast discussion, Mar 3, 10:30 AM CST, 15 minutes before

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Hazardous weather outlook, Mar 3, 4:57 AM CST, 5 hours 48 minutes before

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In the hours before

Local storm report, Mar 3, 8:22 AM CST, 2 hours 23 minutes before

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Local storm report, Mar 3, 8:27 AM CST, 2 hours 18 minutes before

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Local storm report, Mar 3, 9:16 AM CST, 1 hour 29 minutes before

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Local storm report, Mar 3, 9:38 AM CST, 1 hour 7 minutes before

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Local storm report, Mar 3, 10:21 AM CST, 24 minutes before

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Local storm report, Mar 3, 10:26 AM CST, 19 minutes before

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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
Mar 2, 6:29 PM CST	River Flood Warning	DVN	Keokuk	5 days
Mar 3, 1:31 AM CST	River Flood Warning	DVN	Johnson, Washington	4 days
Mar 3, 6:10 AM CST	River Flood Warning	DVN	Lee, Van Buren	22 hr
Mar 3, 7:43 AM CST	River Flood Warning	DVN	Lee	6 days
Mar 3, 8:10 AM CST	River Flood Warning	DVN	Clinton, Scott	3 days
Mar 3, 10:25 AM CST	River Flood Warning	DVN	Iowa, Johnson	17 hr
Mar 3, 10:25 AM CST	River Flood Warning	DVN	Johnson, Louisa, Washington	24 hr
Mar 3, 10:25 AM CST	River Flood Warning	DVN	Louisa	10 hr
Mar 3, 10:32 AM CST	River Flood Advisory	DVN	Louisa	57 hr
Mar 3, 10:32 AM CST	River Flood Advisory	DVN	Des Moines, Henry, Lee	18 hr
Mar 2, 6:29 PM CST	River Flood Warning	DVN	Henry, Rock Island	21 days
Mar 2, 6:29 PM CST	River Flood Warning	DVN	Henry, Rock Island	39 hr
Mar 3, 2:56 AM CST	River Flood Warning	DVN	Henry, Rock Island, Whiteside	75 days
Mar 3, 9:57 AM CST	River Flood Advisory	DVN	Whiteside	19 hr
Mar 3, 9:57 AM CST	River Flood Advisory	DVN	Stephenson	7 days
Mar 3, 9:57 AM CST	River Flood Advisory	DVN	Hancock, McDonough	25 hr

Nearby

Flash Flood Watches in Illinois, 2008 Every flash 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.