Alert archive / Iowa / Flash Flood Watches in 2015
Flash Flood Watch 10, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood watch at Sep 23, 2015, 9:17 AM CDT for 8 counties in Iowa. It was in force for 19 hr.
The area
The counties it named.
The facts
- Issued
- Sep 23, 2015, 9:17 AM CDT (14:17 UTC)
- Expired
- Sep 24, 2015, 3:58 AM CDT
- In force
- 19 hr
- Issued by
- NWS Des Moines, IA
- Flood severity
- None
Counties Adair County, IA, Adams County, IA, Audubon County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Guthrie County, IA, Taylor County, IA
The radar
The Des Moines radar (KDMX), 94 km from the middle of the area, began a volume at 14:18 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
Topeka, KS (KFOE), launched 12:00Z, 2.3 hours before the alert went out and 285 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.
- Mixed-layer CAPE
- 300 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1164 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- -35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Des Moines, IA wrote its last area forecast discussion before this flash flood watch went out at Sep 22, 6:44 PM CDT, 14 hours 33 minutes earlier.
Area forecast discussion, Sep 22, 6:44 PM CDT, 14 hours 33 minutes before
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</html>Hazardous weather outlook, Sep 22, 4:03 PM CDT, 17 hours 14 minutes before
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Flash Flood Watches in Iowa, 2015Every 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.