Alert archive / Florida / Frost Advisories in 2021
Frost Advisory 3, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this frost advisory at Jan 18, 2021, 4:05 PM EST for 4 counties in Florida. It took effect at Jan 19, 2021, 3:00 AM EST. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Jan 18, 2021, 4:05 PM EST (21:05 UTC)
- In effect from
- Jan 19, 2021, 3:00 AM EST
- Expired
- Jan 19, 2021, 8:00 AM EST
- In force
- 5 hr
- Issued by
- NWS Tampa Bay, FL
Counties Citrus County, FL, Hernando County, FL, Pasco County, FL, Sumter County, FL
The radar
The Tampa radar (KTBW), 100 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 100 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 882 m above ground
- 0-6 km bulk shear
- 87 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
008 WWUS72 KTBW 182105 NPWTBW URGENT - WEATHER MESSAGE National Weather Service Tampa Bay Ruskin FL 405 PM EST Mon Jan 18 2021 FLZ139-239-242-248-191300- /O.CON.KTBW.FZ.W.0002.210119T0800Z-210119T1300Z/ Coastal Levy-Inland Levy-Inland Citrus-Inland Hernando- Including the cities of Cedar Key, Yankeetown, Chiefland, Bronson, Williston, Inverness, Brooksville, and Spring Hill 405 PM EST Mon Jan 18 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 8 AM EST TUESDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Coastal Levy, Inland Levy, Inland Citrus and Inland Hernando Counties. * WHEN...From 3 AM to 8 AM EST Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... A freeze warning means widespread freezing temperatures are expected to occur. Take steps now to protect tender plants from the cold. Exposed outdoor water pipes may burst if not wrapped or covered. && $$ FLZ043-142-148-249-191300- /O.NEW.KTBW.FR.Y.0003.210119T0800Z-210119T1300Z/ Sumter-Coastal Citrus-Coastal Hernando-Inland Pasco- Including the cities of Wildwood, Lake Panasoffkee, Bushnell, The Villages, Crystal River, Homosassa, Hernando Beach, Bayport, Dade City, and Zephyrhills 405 PM EST Mon Jan 18 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM EST TUESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Sumter, Coastal Citrus, Coastal Hernando and Inland Pasco Counties. * WHEN...From 3 AM to 8 AM EST Tuesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/tampabay
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 18, 3:39 AM EST | Freeze Warning | TBW | Citrus, Hernando, Levy | 28 hr |
Nearby
Frost Advisories in Florida, 2021Every frost advisory in 2021
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.