Alert archive / Wisconsin / Frost Advisories in 2026

Frost Advisory 9, NWS Green Bay, WI

September 13, 20268 counties in Wisconsin

NWS Green Bay, WI issued this frost advisory at Sep 13, 2026, 2:08 AM CDT for 8 counties in Wisconsin. It took effect at Sep 14, 2026, 12:00 AM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Sep 13, 2026, 2:08 AM CDT (07:08 UTC)
In effect from: Sep 14, 2026, 12:00 AM CDT
Expired: Sep 14, 2026, 8:00 AM CDT
In force: 8 hr
Issued by: NWS Green Bay, WI

Counties Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marinette County, WI, Oconto County, WI, Oneida County, WI, Vilas County, WI

The radar

The Green Bay radar (KGRB), 130 km from the middle of the area, began a volume at 07:09 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.

What forecasters said that day

The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Green Bay, WI wrote its last area forecast discussion before this frost advisory went out at Sep 12, 10:50 PM CDT, 3 hours 18 minutes earlier.

Area forecast discussion, Sep 12, 10:50 PM CDT, 3 hours 18 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Sep 12, 12:33 PM CDT, 13 hours 35 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 13, 4:31 AM CDT	Small Craft Advisory	GRB		14 hr
Sep 13, 12:46 PM CDT	Gale Watch	GRB		9 hr
Sep 13, 12:46 PM CDT	Small Craft Advisory	GRB		32 hr
Sep 13, 1:13 PM CDT	Beach Hazards Statement	GRB	Door, Kewaunee, Manitowoc	54 hr

Nearby

Frost Advisories in Wisconsin, 2026 Every frost advisory in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.