Alert archive / Florida / Heat Advisories in 2019

Heat Advisory 3, NWS Melbourne, FL

July 4, 2019Lake County, Florida

NWS Melbourne, FL issued this heat advisory at Jul 4, 2019, 7:24 AM EDT for Lake County, Florida. It took effect at Jul 4, 2019, 11:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 4, 2019, 7:24 AM EDT (11:24 UTC)
In effect from: Jul 4, 2019, 11:00 AM EDT
Expired: Jul 4, 2019, 6:00 PM EDT
In force: 7 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 11:23 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

Jacksonville, FL (KJAX), launched 00:00Z, 11.4 hours before the alert went out and 193 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: 676 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1824 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 15 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 heat advisory 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 heat advisory went out at Jul 4, 3:04 AM EDT, 4 hours 20 minutes earlier.

Area forecast discussion, Jul 4, 3:04 AM EDT, 4 hours 20 minutes before

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Hazardous weather outlook, Jul 4, 4:06 AM EDT, 3 hours 18 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
Jul 4, 2:20 PM EDT	Special Weather Statement	MLB	Volusia	55 min
Jul 4, 3:08 PM EDT	Special Weather Statement	MLB	Lake	52 min
Jul 4, 3:59 PM EDT	Special Weather Statement	MLB	Volusia	46 min
Jul 4, 5:21 PM EDT	Special Weather Statement	MLB	Orange	39 min

Nearby

Heat Advisories in Florida, 2019 Every heat advisory in 2019

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.