Alert archive / Florida / Hard Freeze Warnings in 2011

Hard Freeze Warning 1, NWS Melbourne, FL

January 12, 2011Lake County, Florida

NWS Melbourne, FL issued this hard freeze warning at Jan 12, 2011, 3:41 PM EST for Lake County, Florida. It took effect at Jan 13, 2011, 12:00 AM EST. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 12, 2011, 3:41 PM EST (20:41 UTC)
In effect from: Jan 13, 2011, 12:00 AM EST
Expired: Jan 13, 2011, 8:00 AM EST
In force: 8 hr
Issued by: NWS Melbourne, FL

County Lake County, FL

The radar

The Melbourne radar (KMLB), 126 km from the middle of the area, began a volume at 20:47 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, 8.7 hours before the alert went out and 136 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: 2039 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -120 m²/s²
0-3 km storm-relative helicity: 28 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 hard freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Melbourne, FL wrote its last area forecast discussion before this hard freeze warning went out at Jan 12, 3:27 PM EST, 14 minutes earlier.

Area forecast discussion, Jan 12, 3:27 PM EST, 14 minutes before

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Hazardous weather outlook, Jan 12, 4:35 AM EST, 11 hours 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 12, 3:18 AM EST	Fire Weather Watch	MLB	Lake, Okeechobee, Orange, Osceola, Seminole	23 hr
Jan 12, 3:29 AM EST	Freeze Warning	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	29 hr
Jan 12, 3:50 PM EST	Wind Chill Advisory	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	18 hr

Nearby

Hard Freeze Warnings in Florida, 2011 Every hard freeze warning in 2011

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.