Alert archive / Iowa / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS Quad Cities, IA

June 3, 201413 counties in Iowa; 7 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this flash flood watch at Jun 3, 2014, 3:33 AM CDT for 13 counties in Iowa; 7 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jun 3, 2014, 10:00 PM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jun 3, 2014, 3:33 AM CDT (08:33 UTC)
In effect from: Jun 3, 2014, 10:00 PM CDT
Expired: Jun 4, 2014, 6:52 AM CDT
In force: 9 hr
Issued by: NWS Quad Cities, IA
Flood severity: None

All 22 counties

Cedar County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 83 km from the middle of the area, began a volume at 08:37 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

Omaha, NE (KOAX), launched 00:00Z, 8.6 hours before the alert went out and 425 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: 126 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 2070 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 Jun 3, 3:10 AM CDT, 23 minutes earlier.

Area forecast discussion, Jun 3, 3:10 AM CDT, 23 minutes before

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Hazardous weather outlook, Jun 2, 3:54 AM CDT, 23 hours 39 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
Jun 3, 1:13 PM CDT	River Flood Warning	DVN	Clark	4 days

Nearby

Flash Flood Watches in Iowa, 2014 Flash Flood Watches in Illinois, 2014 Flash Flood Watches in Missouri, 2014 Every flash flood watch in 2014

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.