Alert archive / Florida / Tornado Warnings in 2021
Tornado Warning 17, NWS Jacksonville, FL
NWS Jacksonville, FL issued this tornado warning at Mar 18, 2021, 4:10 PM EDT for Clay County, Duval County, Florida. It was in force for 11 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 18, 2021, 4:10 PM EDT (20:10 UTC)
- Expired
- Mar 18, 2021, 4:21 PM EDT
- In force
- 11 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Clay County, FL, Duval County, FL
The radar
The Jacksonville radar (KJAX), 39 km from the middle of the area, began a volume at 20:10 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 18, 11:42 AM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 8.2 hours before the alert went out and 40 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
- 162 J/kg
- Mixed-layer CIN
- -183 J/kg
- Mixed-layer LCL
- 888 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
037
WFUS52 KJAX 182010
TORJAX
FLC019-031-182045-
/O.NEW.KJAX.TO.W.0017.210318T2010Z-210318T2045Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jacksonville FL
410 PM EDT Thu Mar 18 2021
The National Weather Service in Jacksonville has issued a
* Tornado Warning for...
Northern Clay County in northeastern Florida...
South central Duval County in northeastern Florida...
* Until 445 PM EDT.
* At 409 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Middleburg, moving northeast at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Oakleaf Plantation and Cecil Field around 420 PM EDT.
Lakeside, Doctors Inlet and Fleming Island around 425 PM EDT.
Orange Park and Bellair-Meadowbrook Terrace around 430 PM EDT.
Mandarin, Fruit Cove, Nas Jax, Ortega and Normandy around 435 PM
EDT.
San Marco and Riverside around 440 PM EDT.
Other locations impacted by this tornadic thunderstorm include
Jacksonville Heights and Asbury Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3012 8156 3013 8160 3012 8168 3009 8168
3002 8195 3011 8200 3039 8168
TIME...MOT...LOC 2009Z 237DEG 37KT 3009 8192
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
NELSON2 follow-up statements
949
WWUS52 KJAX 182017
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
417 PM EDT Thu Mar 18 2021
FLC019-031-182045-
/O.CON.KJAX.TO.W.0017.000000T0000Z-210318T2045Z/
Clay FL-Duval FL-
417 PM EDT Thu Mar 18 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR NORTH
CENTRAL CLAY AND SOUTH CENTRAL DUVAL COUNTIES...
At 417 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Oakleaf Plantation, or 7 miles northeast of
Middleburg, moving northeast at 45 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Orange Park, Mandarin and Bellair-Meadowbrook Terrace around 430
PM EDT.
Nas Jax, Ortega and Riverside around 435 PM EDT.
San Marco around 440 PM EDT.
Other locations impacted by this tornadic thunderstorm include
Jacksonville Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3008 8185 3015 8191 3036 8166 3016 8158
TIME...MOT...LOC 2017Z 237DEG 37KT 3014 8183
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
AK017
WWUS52 KJAX 182021
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
421 PM EDT Thu Mar 18 2021
FLC019-031-182030-
/O.CAN.KJAX.TO.W.0017.000000T0000Z-210318T2045Z/
Clay FL-Duval FL-
421 PM EDT Thu Mar 18 2021
...THE TORNADO WARNING FOR NORTH CENTRAL CLAY AND SOUTH CENTRAL DUVAL
COUNTIES IS CANCELLED...
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, damaging winds remain likely and a Severe
Thunderstorm Warning remains in effect for the area.
A Tornado Watch remains in effect until 600 PM EDT for northeastern
Florida.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Jacksonville.
LAT...LON 3008 8185 3015 8191 3036 8166 3016 8158
TIME...MOT...LOC 2018Z 237DEG 37KT 3017 8179
$$
AKThe office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 2:31 AM EDT | Wind Advisory | JAX | Alachua, Baker, Bradford, Duval, Flagler, Gilchrist and 4 more | 15 hr |
| Mar 18, 11:53 AM EDT | Special Weather Statement | JAX | Hamilton, Suwannee | 82 min |
| Mar 18, 12:55 PM EDT | Special Weather Statement | JAX | Gilchrist, Suwannee | 50 min |
| Mar 18, 1:16 PM EDT | Special Weather Statement | JAX | Hamilton | 29 min |
| Mar 18, 1:33 PM EDT | Special Weather Statement | JAX | Columbia, Suwannee | 42 min |
| Mar 18, 1:41 PM EDT | Severe Thunderstorm Warning | JAX | Columbia, Gilchrist, Suwannee | 49 min |
| Mar 18, 2:02 PM EDT | Special Weather Statement | JAX | Gilchrist | 43 min |
| Mar 18, 2:09 PM EDT | Special Weather Statement | JAX | Baker, Bradford, Union | 66 min |
| Mar 18, 2:29 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Gilchrist | 46 min |
| Mar 18, 2:40 PM EDT | Tornado Warning | JAX | Alachua, Gilchrist | 35 min |
| Mar 18, 2:58 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Bradford, Union | 47 min |
| Mar 18, 3:07 PM EDT | Tornado Warning | JAX | Alachua, Bradford, Union | 23 min |
| Mar 18, 3:22 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Bradford, Clay, Duval, Union | 38 min |
| Mar 18, 3:40 PM EDT | Special Weather Statement | JAX | Duval, Nassau | 50 min |
| Mar 18, 3:57 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Bradford, Clay, Duval | 36 min |
| Mar 18, 3:59 PM EDT | Special Marine Warning | JAX | 91 min | |
| Mar 18, 4:41 PM EDT | Special Weather Statement | JAX | Saint Johns | 19 min |
| Mar 18, 4:49 PM EDT | Special Weather Statement | JAX | Citrus | 56 min |
| Mar 18, 4:52 PM EDT | Special Marine Warning | JAX | 83 min | |
| Mar 18, 5:31 PM EDT | Special Weather Statement | JAX | Duval | 44 min |
| Mar 18, 6:07 PM EDT | Special Weather Statement | JAX | Duval | 23 min |
| Mar 18, 6:10 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Mar 18, 7:09 PM EDT | Special Weather Statement | JAX | Saint Johns | 51 min |
Nearby
Tornado Warnings in Florida, 2021Every tornado warning in 2021Tornadoes 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.