Alert archive / Florida / Wind Chill Advisories in 2018

Wind Chill Advisory 1, NWS Tampa Bay, FL

January 1, 201813 counties in Florida

NWS Tampa Bay, FL issued this wind chill advisory at Jan 1, 2018, 2:39 PM EST for 13 counties in Florida. It took effect at Jan 1, 2018, 10:00 PM EST. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jan 1, 2018, 2:39 PM EST (19:39 UTC)
In effect from: Jan 1, 2018, 10:00 PM EST
Expired: Jan 2, 2018, 9:02 AM EST
In force: 11 hr
Issued by: NWS Tampa Bay, FL

Counties Citrus County, FL, DeSoto County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Levy County, FL, Manatee County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Sarasota County, FL, Sumter County, FL

The radar

The Tampa radar (KTBW), 39 km from the middle of the area, began a volume at 19:41 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.7 hours before the alert went out and 175 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: 1261 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 208 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 wind chill advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tampa Bay, FL wrote its last area forecast discussion before this wind chill advisory went out at Jan 1, 9:27 AM EST, 5 hours 12 minutes earlier.

Area forecast discussion, Jan 1, 9:27 AM EST, 5 hours 12 minutes before

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Hazardous weather outlook, Jan 1, 5:20 AM EST, 9 hours 19 minutes before

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<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.
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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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The office that day

Everything else NWS Tampa Bay, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 1, 3:34 AM EST	Rip Current Statement	TBW	Charlotte, Lee, Manatee, Pinellas, Sarasota	38 hr
Jan 1, 3:52 AM EST	Freeze Watch	TBW	Citrus	11 hr
Jan 1, 3:52 AM EST	Hard Freeze Watch	TBW	Levy	11 hr
Jan 1, 2:39 PM EST	Freeze Warning	TBW	Citrus, Levy	18 hr

Nearby

Wind Chill Advisories in Florida, 2018 Every wind chill advisory in 2018

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.