Alert archive / Florida / Freeze Watches in 2012

Freeze Watch 5, NWS Miami, FL

December 21, 2012Glades County, Hendry County, Florida

NWS Miami, FL issued this freeze watch at Dec 21, 2012, 2:31 PM EST for Glades County, Hendry County, Florida. It took effect at Dec 23, 2012, 2:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 21, 2012, 2:31 PM EST (19:31 UTC)
In effect from
Dec 23, 2012, 2:00 AM EST
Expired
Dec 22, 2012, 1:53 PM EST
In force
Issued by
NWS Miami, FL

Counties Glades County, FL, Hendry County, FL

The radar

The Miami radar (KAMX), 148 km from the middle of the area, began a volume at 19:32 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

Tampa Bay, FL (KTBW), launched 12:00Z, 7.5 hours before the alert went out and 161 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, Tampa Bay, FL at 12:00Z on 2012-12-21Temperature 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, Tampa Bay, FL at 12:00Z on 2012-12-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -155 square meters per square second.19395878Sfc1 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
911 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
-155 m²/s²
0-3 km storm-relative helicity
-143 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 freeze 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 freeze watch went out at Dec 21, 12:36 PM EST, 1 hour 55 minutes earlier.

Area forecast discussion, Dec 21, 12:36 PM EST, 1 hour 55 minutes before
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Hazardous weather outlook, Dec 21, 10:09 AM EST, 4 hours 22 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 21, 4:30 AM ESTWind Chill AdvisoryMFLBroward, Collier, Glades, Hendry, Miami-Dade, Palm Beach28 hr
Dec 21, 5:26 AM ESTRip Current StatementMFLCollier14 hr
Dec 21, 5:52 AM ESTRed Flag WarningMFLBroward, Miami-Dade, Palm Beach11 hr
Dec 21, 2:31 PM ESTFreeze WarningMFLGlades, Hendry17 hr

Nearby

Freeze Watches in Florida, 2012Every freeze watch in 2012

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.