Alert archive / Florida / Wind Chill Advisories in 2021
Wind Chill Advisory 2, NWS Jacksonville, FL
NWS Jacksonville, FL issued this wind chill advisory at Feb 2, 2021, 2:34 PM EST for Duval County, Flagler County, Nassau County, Florida. It took effect at Feb 3, 2021, 4:00 AM EST. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Feb 2, 2021, 2:34 PM EST (19:34 UTC)
- In effect from
- Feb 3, 2021, 4:00 AM EST
- Expired
- Feb 3, 2021, 9:00 AM EST
- In force
- 5 hr
- Issued by
- NWS Jacksonville, FL
Counties Duval County, FL, Flagler County, FL, Nassau County, FL
The radar
The Jacksonville radar (KJAX), 40 km from the middle of the area, began a volume at 19:36 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 12:00Z, 7.6 hours before the alert went out and 42 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
- 1185 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
705 WWUS42 KJAX 021934 WSWJAX URGENT - WINTER WEATHER MESSAGE National Weather Service Jacksonville FL 234 PM EST Tue Feb 2 2021 FLZ124-125-133-138-031400- /O.NEW.KJAX.WC.Y.0002.210203T0900Z-210203T1400Z/ Coastal Nassau-Coastal Duval-Coastal St. Johns-Coastal Flagler- Including the cities of Amelia City, Fernandina Beach, Yulee, Arlington, Jacksonville, Oceanway, Tallyrand, Ponte Vedra Beach, Durbin, Palm Valley, Anastasia, Saint Augustine, and Palm Coast 234 PM EST Tue Feb 2 2021 ...WIND CHILL ADVISORY IN EFFECT FROM 4 AM TO 9 AM EST WEDNESDAY... * WHAT...Very cold wind chills expected. Wind chills in the low to mid 20s. * WHERE...Coastal Nassau, Coastal Duval, Coastal St. Johns and Coastal Flagler Counties. * WHEN...From 4 AM to 9 AM EST Wednesday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Protect people and pets. && $$
1 follow-up statement
026 WWUS42 KJAX 031400 WSWJAX URGENT - WINTER WEATHER MESSAGE National Weather Service Jacksonville FL 900 AM EST Wed Feb 3 2021 FLZ124-125-133-138-031500- /O.EXP.KJAX.WC.Y.0002.000000T0000Z-210203T1400Z/ Coastal Nassau-Coastal Duval-Coastal St. Johns-Coastal Flagler- Including the cities of Amelia City, Fernandina Beach, Yulee, Arlington, Jacksonville, Oceanway, Tallyrand, Ponte Vedra Beach, Durbin, Palm Valley, Anastasia, Saint Augustine, and Palm Coast 900 AM EST Wed Feb 3 2021 ...WIND CHILL ADVISORY HAS EXPIRED... $$
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 2, 1:09 AM EST | Freeze Warning | JAX | Alachua, Bradford, Duval, Flagler, Marion, Nassau | 32 hr |
| Feb 2, 2:32 PM EST | Freeze Watch | JAX | Alachua, Bradford, Flagler, Marion, Nassau | 19 hr |
Nearby
Wind Chill Advisories in Florida, 2021Every wind chill 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.