Alert archive / Florida / High Surf Advisories in 2020

High Surf Advisory 11, NWS Miami, FL

November 19, 2020Palm Beach County, Florida

NWS Miami, FL issued this high surf advisory at Nov 19, 2020, 3:06 AM EST for Palm Beach County, Florida. It was in force for 28 hr.

The area

The counties it named.

The facts

Issued: Nov 19, 2020, 3:06 AM EST (08:06 UTC)
Expired: Nov 20, 2020, 7:00 AM EST
In force: 28 hr
Issued by: NWS Miami, FL

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 115 km from the middle of the area, began a volume at 08:08 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 00:00Z, 8.1 hours before the alert went out and 203 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: 16 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 77 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 high surf advisory 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 high surf advisory went out at Nov 18, 3:45 PM EST, 11 hours 21 minutes earlier.

Area forecast discussion, Nov 18, 3:45 PM EST, 11 hours 21 minutes before

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Hazardous weather outlook, Nov 18, 3:59 PM EST, 11 hours 7 minutes before

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Nearby

High Surf Advisories in Florida, 2020 Every high surf advisory in 2020

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.