Alert archive / Iowa / Flash Flood Watches in 2015

Flash Flood Watch 3, NWS Quad Cities, IA

June 23, 201521 counties in Iowa; 13 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this flash flood watch at Jun 23, 2015, 3:39 PM CDT for 21 counties in Iowa; 13 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jun 24, 2015, 4:00 PM CDT. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Jun 23, 2015, 3:39 PM CDT (20:39 UTC)
In effect from: Jun 24, 2015, 4:00 PM CDT
Expired: Jun 25, 2015, 10:00 AM CDT
In force: 18 hr
Issued by: NWS Quad Cities, IA
Flood severity: None

All 36 counties

Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 41 km from the middle of the area, began a volume at 20:41 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 12:00Z, 8.7 hours before the alert went out and 47 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: 1836 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -56 m²/s²
0-3 km storm-relative helicity: 33 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 Jun 23, 12:43 PM CDT, 2 hours 56 minutes earlier.

Area forecast discussion, Jun 23, 12:43 PM CDT, 2 hours 56 minutes before

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Hazardous weather outlook, Jun 23, 3:34 AM CDT, 12 hours 5 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 23, 8:55 AM CDT	River Flood Warning	DVN	Clinton, Scott	5 days
Jun 22, 7:15 PM CDT	Flash Flood Warning	DVN	Whiteside	4 hr
Jun 22, 7:16 PM CDT	Tornado Warning	DVN	Whiteside	14 min
Jun 22, 7:19 PM CDT	Tornado Warning	DVN	Mercer, Rock Island	15 min
Jun 22, 7:42 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	33 min
Jun 22, 8:07 PM CDT	Tornado Warning	DVN	Henry	53 min
Jun 22, 8:15 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	30 min
Jun 22, 8:43 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	14 min
Jun 23, 2:00 AM CDT	River Flood Warning	DVN	Whiteside	71 hr
Jun 22, 7:07 PM CDT	Tornado Warning	DVN	Scotland	53 min
Jun 22, 7:59 PM CDT	Flash Flood Warning	DVN	Clark, Scotland	4 hr

Nearby

Flash Flood Watches in Iowa, 2015 Flash Flood Watches in Illinois, 2015 Flash Flood Watches in Missouri, 2015 Every flash flood watch in 2015

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.