Alert archive / Florida / High Surf Advisories in 2020

High Surf Advisory 9, NWS Tampa Bay, FL

November 30, 20206 counties in Florida

NWS Tampa Bay, FL issued this high surf advisory at Nov 30, 2020, 2:22 AM EST for 6 counties in Florida. It took effect at Nov 30, 2020, 10:00 AM EST. It was in force for 33 hr.

The area

The counties it named.

The facts

Issued: Nov 30, 2020, 2:22 AM EST (07:22 UTC)
In effect from: Nov 30, 2020, 10:00 AM EST
Expired: Dec 1, 2020, 7:00 PM EST
In force: 33 hr
Issued by: NWS Tampa Bay, FL

Counties Charlotte County, FL, Hillsborough County, FL, Lee County, FL, Manatee County, FL, Pinellas County, FL, Sarasota County, FL

The radar

The Tampa radar (KTBW), 44 km from the middle of the area, began a volume at 07:26 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 00:00Z, 7.4 hours before the alert went out and 43 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: 1268 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 136 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 Tampa Bay, FL wrote its last area forecast discussion before this high surf advisory went out at Nov 30, 12:29 AM EST, 1 hour 53 minutes earlier.

Area forecast discussion, Nov 30, 12:29 AM EST, 1 hour 53 minutes before

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Hazardous weather outlook, Nov 29, 3:41 AM EST, 22 hours 41 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 30, 2:22 AM EST	Rip Current Statement	TBW	Charlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota	41 hr
Nov 30, 4:56 AM EST	Special Marine Warning	TBW		94 min
Nov 30, 5:56 AM EST	Tornado Warning	TBW	Hillsborough, Pasco, Pinellas	34 min
Nov 30, 6:23 AM EST	Special Weather Statement	TBW	Pinellas	52 min
Nov 30, 6:29 AM EST	Special Marine Warning	TBW		61 min
Nov 30, 7:13 AM EST	Special Weather Statement	TBW	Hillsborough, Manatee, Sarasota	47 min
Nov 30, 7:26 AM EST	Special Weather Statement	TBW	Hillsborough, Manatee, Sarasota	49 min
Nov 30, 7:33 AM EST	Special Marine Warning	TBW		42 min
Nov 30, 8:18 AM EST	Special Weather Statement	TBW	Hardee, Polk, Sarasota	42 min
Nov 30, 2:52 PM EST	Freeze Watch	TBW	Citrus, Hernando, Levy, Sumter	11 hr

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.