Alert archive / Iowa / Winter Storm Warnings in 2023
Winter Storm Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this winter storm warning at Jan 17, 2023, 3:09 PM CST for 26 counties in Iowa. It took effect at Jan 18, 2023, 12:00 PM CST. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jan 17, 2023, 3:09 PM CST (21:09 UTC)
- In effect from
- Jan 18, 2023, 12:00 PM CST
- Expired
- Jan 19, 2023, 12:00 PM CST
- In force
- 24 hr
- Issued by
- NWS Des Moines, IA
All 26 counties
Audubon County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Crawford County, IA, Emmet County, IA, Franklin County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Story County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 94 km from the middle of the area, began a volume at 21:11 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 12:00Z, 9.2 hours before the alert went out and 233 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
- 663 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 17, 3:07 AM CST | Winter Storm Watch | DMX | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 27 more | 12 hr |
| Jan 17, 3:09 PM CST | Winter Weather Advisory | DMX | Adair, Adams, Black Hawk, Cass, Clarke, Dallas and 12 more | 45 hr |
Nearby
Winter Storm Warnings in Iowa, 2023Every winter storm warning in 2023
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.