Alert archive / Florida / Wind Chill Watches in 2009

Wind Chill Watch 1, NWS Miami, FL

February 4, 20097 counties in Florida

NWS Miami, FL issued this wind chill watch at Feb 4, 2009, 3:53 AM EST for 7 counties in Florida. It took effect at Feb 5, 2009, 4:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Feb 4, 2009, 3:53 AM EST (08:53 UTC)
In effect from
Feb 5, 2009, 4:00 AM EST
Expired
Feb 4, 2009, 1:45 PM EST
In force
Issued by
NWS Miami, FL

Counties Broward County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 82 km from the middle of the area, began a volume at 08:56 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

Miami, FL (KMFL), launched 00:00Z, 8.9 hours before the alert went out and 73 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-pSkew-T log-p diagram, Miami, FL at 00:00Z on 2009-02-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 00:00Z on 2009-02-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
2510 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
9 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this wind chill watch went out at Feb 4, 12:25 AM EST, 3 hours 28 minutes earlier.

Area forecast discussion, Feb 4, 12:25 AM EST, 3 hours 28 minutes before
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Hazardous weather outlook, Feb 3, 7:10 PM EST, 8 hours 43 minutes before
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</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.
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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 Miami, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 4, 3:40 AM ESTFreeze WarningMFLBroward, Collier, Miami-Dade, Monroe, Palm Beach29 hr
Feb 4, 3:40 AM ESTHard Freeze WarningMFLCollier, Glades, Hendry, Palm Beach29 hr
Feb 4, 4:51 AM ESTRed Flag WarningMFLBroward, Collier, Miami-Dade, Monroe, Palm Beach38 hr
Feb 4, 1:32 PM ESTFreeze WatchMFLCollier, Glades, Hendry24 hr
Feb 4, 1:45 PM ESTWind Chill WarningMFLBroward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more20 hr
Feb 4, 1:45 PM ESTWind Chill AdvisoryMFLBroward, Miami-Dade19 hr

Nearby

Wind Chill Watches in Florida, 2009Every wind chill watch in 2009

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.