Alert archive / Iowa / Flash Flood Watches in 2019
Flash Flood Watch 1, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood watch at Mar 17, 2019, 11:20 AM CDT for Humboldt County, Iowa. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Mar 17, 2019, 11:20 AM CDT (16:20 UTC)
- Expired
- Mar 17, 2019, 10:06 PM CDT
- In force
- 11 hr
- Issued by
- NWS Des Moines, IA
- Flood severity
- None
County Humboldt County, IA
The radar
The Des Moines radar (KDMX), 123 km from the middle of the area, began a volume at 16:19 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
Minneapolis, MN (KMPX), launched 12:00Z, 4.3 hours before the alert went out and 236 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 104 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 Mar 17, 5:47 AM CDT, 5 hours 33 minutes earlier.
Area forecast discussion, Mar 17, 5:47 AM CDT, 5 hours 33 minutes before
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</html>Hazardous weather outlook, Mar 17, 4:21 AM CDT, 6 hours 59 minutes before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 16, 8:14 PM CDT | Areal Flood Warning | DMX | Humboldt, Webster | 24 hr |
| Mar 16, 8:20 PM CDT | Areal Flood Warning | DMX | Black Hawk, Bremer | 24 hr |
| Mar 16, 9:21 PM CDT | River Flood Warning | DMX | Humboldt, Kossuth | 8 days |
| Mar 17, 12:21 AM CDT | Flash Flood Warning | DMX | Kossuth | 6 hr |
| Mar 17, 6:13 AM CDT | Areal Flood Warning | DMX | Kossuth | 33 hr |
| Mar 17, 3:58 PM CDT | Areal Flood Warning | DMX | Franklin, Hardin | 24 hr |
Nearby
Flash Flood Watches in Iowa, 2019Every flash flood watch in 2019
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.