Alert archive / Iowa / Winter Weather Advisories in 2021

Winter Weather Advisory 5, NWS Quad Cities, IA

January 24, 20217 counties in Iowa; 6 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this winter weather advisory at Jan 24, 2021, 2:43 PM CST for 7 counties in Iowa; 6 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jan 25, 2021, 6:00 AM CST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Jan 24, 2021, 2:43 PM CST (20:43 UTC)
In effect from: Jan 25, 2021, 6:00 AM CST
Expired: Jan 26, 2021, 12:00 PM CST
In force: 30 hr
Issued by: NWS Quad Cities, IA

Counties Buchanan County, IA, Delaware County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Van Buren County, IA, Bureau County, IL, Hancock County, IL, Henderson County, IL, McDonough County, IL, Putnam County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 82 km from the middle of the area, began a volume at 20:41 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, 8.7 hours before the alert went out and 87 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: 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

Open this sounding in Storm Lab

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 Quad Cities, IA wrote its last area forecast discussion before this winter weather advisory went out at Jan 24, 11:27 AM CST, 3 hours 16 minutes earlier.

Area forecast discussion, Jan 24, 11:27 AM CST, 3 hours 16 minutes before

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Hazardous weather outlook, Jan 24, 4:21 AM CST, 10 hours 22 minutes before

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In the hours before

Local storm report, Jan 24, 8:53 AM CST, 5 hours 50 minutes before

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Local storm report, Jan 24, 8:55 AM CST, 5 hours 48 minutes before

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Local storm report, Jan 24, 8:59 AM CST, 5 hours 44 minutes before

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Local storm report, Jan 24, 9:25 AM CST, 5 hours 18 minutes before

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Local storm report, Jan 24, 10:14 AM CST, 4 hours 29 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Jan 24, 11:13 AM CST, 3 hours 30 minutes before

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  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
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      <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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
Jan 24, 2:43 PM CST	Winter Storm Warning	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	45 hr

Nearby

Winter Weather Advisories in Iowa, 2021 Winter Weather Advisories in Illinois, 2021 Winter Weather Advisories in Missouri, 2021 Every 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.