Alert archive / Iowa / Flash Flood Watches in 2015

Flash Flood Watch 5, NWS Quad Cities, IA

July 16, 201514 counties in Iowa; 10 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this flash flood watch at Jul 16, 2015, 3:54 AM CDT for 14 counties in Iowa; 10 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jul 16, 2015, 4:00 AM CDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: Jul 16, 2015, 3:54 AM CDT (08:54 UTC)
In effect from: Jul 16, 2015, 4:00 AM CDT
Expired: Jul 17, 2015, 1:00 AM CDT
In force: 21 hr
Issued by: NWS Quad Cities, IA
Flood severity: None

All 26 counties

Cedar County, IA, Clinton 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, Bureau County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Warren County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 65 km from the middle of the area, began a volume at 08:56 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, 8.9 hours before the alert went out and 441 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: 1398 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 72 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 Jul 15, 11:55 PM CDT, 3 hours 59 minutes earlier.

Area forecast discussion, Jul 15, 11:55 PM CDT, 3 hours 59 minutes before

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Hazardous weather outlook, Jul 15, 5:02 AM CDT, 22 hours 52 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
Jul 16, 6:47 AM CDT	Special Weather Statement	DVN	Des Moines, Lee, Louisa	88 min
Jul 16, 3:39 PM CDT	River Flood Warning	DVN	Lee	3 days
Jul 16, 5:13 PM CDT	Severe Thunderstorm Warning	DVN	Henry	32 min
Jul 16, 5:26 PM CDT	Special Weather Statement	DVN	Van Buren	34 min
Jul 16, 5:32 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines	43 min
Jul 16, 5:34 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	41 min
Jul 16, 5:45 PM CDT	Tornado Warning	DVN	Des Moines	45 min
Jul 16, 6:17 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	43 min
Jul 16, 6:35 PM CDT	Tornado Warning	DVN	Henderson, Warren	55 min
Jul 16, 6:57 PM CDT	Tornado Warning	DVN	Rock Island, Whiteside	36 min
Jul 16, 5:04 PM CDT	Special Weather Statement	DVN	Scotland	41 min

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.