Alert archive / Florida / Tornado Warnings in 2021

Tornado Warning 3, NWS Jacksonville, FL

January 27, 2021Clay County, Duval County, Saint Johns County, Florida

NWS Jacksonville, FL issued this tornado warning at Jan 27, 2021, 3:59 PM EST for Clay County, Duval County, Saint Johns County, Florida. It was in force for 19 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: Jan 27, 2021, 3:59 PM EST (20:59 UTC)
Expired: Jan 27, 2021, 4:18 PM EST
In force: 19 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Clay County, FL, Duval County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 39 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 41 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: 88 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 456 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

604 
WFUS52 KJAX 272059
TORJAX
FLC019-031-109-272145-
/O.NEW.KJAX.TO.W.0003.210127T2059Z-210127T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jacksonville FL
359 PM EST Wed Jan 27 2021

The National Weather Service in Jacksonville has issued a

* Tornado Warning for...
  Northwestern St. Johns County in northeastern Florida...
  Northeastern Clay County in northeastern Florida...
  Southeastern Duval County in northeastern Florida...

* Until 445 PM EST.
    
* At 359 PM EST, a severe thunderstorm capable of producing a tornado
  was located over Oakleaf Plantation, or near Orange Park, moving
  east at 25 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...
  Doctors Inlet around 405 PM EST.
  Lakeside and Bellair-Meadowbrook Terrace around 410 PM EST.
  Orange Park and Fleming Island around 415 PM EST.
  Mandarin and Switzerland around 425 PM EST.
  Fruit Cove around 430 PM EST.
  Bayard around 440 PM EST.

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.

&&

LAT...LON 3012 8188 3021 8182 3023 8148 2998 8153
TIME...MOT...LOC 2059Z 284DEG 21KT 3017 8180 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

SHASHY

2 follow-up statements

443 
WWUS52 KJAX 272113
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
413 PM EST Wed Jan 27 2021

FLC019-031-109-272145-
/O.CON.KJAX.TO.W.0003.000000T0000Z-210127T2145Z/
St. Johns FL-Clay FL-Duval FL-
413 PM EST Wed Jan 27 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM EST FOR
NORTHWESTERN ST. JOHNS...NORTHEASTERN CLAY AND SOUTHEASTERN DUVAL
COUNTIES...
    
At 412 PM EST, a severe thunderstorm capable of producing a tornado
was located over Mandarin, moving east 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...
  Bayard around 425 PM EST.

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.

&&

LAT...LON 3008 8178 3022 8166 3023 8148 2998 8153
TIME...MOT...LOC 2112Z 279DEG 34KT 3015 8165 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

SHASHY

452 
WWUS52 KJAX 272118
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
418 PM EST Wed Jan 27 2021

FLC019-031-109-272128-
/O.CAN.KJAX.TO.W.0003.000000T0000Z-210127T2145Z/
St. Johns FL-Clay FL-Duval FL-
418 PM EST Wed Jan 27 2021

...THE TORNADO WARNING FOR NORTHWESTERN ST. JOHNS...NORTHEASTERN CLAY
AND SOUTHEASTERN DUVAL COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3008 8178 3022 8166 3023 8148 2998 8153
TIME...MOT...LOC 2117Z 284DEG 21KT 3014 8161 

$$

SHASHY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 27, 1:58 AM EST	Dense Fog Advisory	JAX	Alachua, Bradford, Flagler, Marion	7 hr
Jan 27, 2:02 AM EST	Gale Warning	JAX		36 hr
Jan 27, 2:02 AM EST	Small Craft Advisory	JAX		19 hr
Jan 27, 12:39 PM EST	Special Weather Statement	JAX	Hamilton	36 min
Jan 27, 12:57 PM EST	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	48 min
Jan 27, 1:42 PM EST	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee	63 min
Jan 27, 1:47 PM EST	Tornado Warning	JAX	Hamilton, Suwannee	28 min
Jan 27, 2:04 PM EST	Tornado Warning	JAX	Columbia, Hamilton, Suwannee	41 min
Jan 27, 2:34 PM EST	Severe Thunderstorm Warning	JAX	Baker, Columbia	41 min
Jan 27, 3:06 PM EST	Special Weather Statement	JAX	Gilchrist	54 min
Jan 27, 3:12 PM EST	Severe Thunderstorm Warning	JAX	Baker, Clay, Duval, Nassau	63 min
Jan 27, 3:35 PM EST	Special Weather Statement	JAX	Clay, Union	40 min
Jan 27, 3:54 PM EST	Special Weather Statement	JAX	Alachua	51 min
Jan 27, 4:04 PM EST	Special Marine Warning	JAX		86 min
Jan 27, 4:08 PM EST	Special Weather Statement	JAX	Duval	37 min
Jan 27, 4:32 PM EST	Special Weather Statement	JAX	Marion	58 min
Jan 27, 5:23 PM EST	Special Weather Statement	JAX	Marion	37 min
Jan 27, 6:02 PM EST	Special Weather Statement	JAX	Marion	43 min

Nearby

Tornado Warnings in Florida, 2021 Every tornado warning in 2021 Tornadoes 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.