Alert archive / Iowa / Winter Weather Advisories in 2021
Winter Weather Advisory 5, NWS Des Moines, IA
NWS Des Moines, IA issued this winter weather advisory at Jan 24, 2021, 3:24 PM CST for 8 counties in Iowa. It took effect at Jan 25, 2021, 6:00 AM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jan 24, 2021, 3:24 PM CST (21:24 UTC)
- In effect from
- Jan 25, 2021, 6:00 AM CST
- Expired
- Jan 25, 2021, 4:17 AM CST
- In force
- Issued by
- NWS Des Moines, IA
Counties Black Hawk County, IA, Boone County, IA, Carroll County, IA, Crawford County, IA, Greene County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA
The radar
The Des Moines radar (KDMX), 55 km from the middle of the area, began a volume at 21:26 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, 9.4 hours before the alert went out and 283 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
- 673 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 279 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather advisory 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 winter weather advisory went out at Jan 24, 2:56 PM CST, 28 minutes earlier.
Area forecast discussion, Jan 24, 2:56 PM CST, 28 minutes before
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</html>Hazardous weather outlook, Jan 24, 3:25 AM CST, 11 hours 59 minutes before
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<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 |
|---|---|---|---|---|
| Jan 24, 3:17 AM CST | Winter Storm Watch | DMX | Audubon, Black Hawk, Boone, Carroll, Crawford, Greene and 6 more | 12 hr |
| Jan 24, 3:17 AM CST | Winter Storm Warning | DMX | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 32 more | 57 hr |
Nearby
Winter Weather Advisories in Iowa, 2021Every winter weather advisory in 2021
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.