Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS Jacksonville, FL

February 15, 20214 counties in Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Feb 15, 2021, 4:21 PM EST for 4 counties in Florida. It was in force for 39 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Feb 15, 2021, 4:21 PM EST (21:21 UTC)
Expired
Feb 15, 2021, 5:00 PM EST
In force
39 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

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

The radar

The Jacksonville radar (KJAX), 60 km from the middle of the area, began a volume at 21:21 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.

What was reported inside it

TimeReportWhereRemark
Feb 15, 4:30 PM ESTHAIL 13 Ene Bakersville, FLQUARTER AND DIME SIZED HAIL REPORTED NEAR WYNWOOD RANCH.
Feb 15, 4:37 PM ESTHAIL 0.884 W South Ponte Vedra, FLPUBLIC REPORTED HAIL VIA SOCIAL MEDIA. ESTIMATED NICKEL SIZE FROM PICTURE. TIMING ESTIMATED BASED ON RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 9 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 15, 3:02 PM ESTTornado WatchSPC7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.4 hours before the alert went out and 62 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-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 2021-02-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 2021-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
408 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

062 
WUUS52 KJAX 152121
SVRJAX
FLC019-031-107-109-152200-
/O.NEW.KJAX.SV.W.0014.210215T2121Z-210215T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
421 PM EST Mon Feb 15 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Central St. Johns County in northeastern Florida...
  North central Putnam County in northeastern Florida...
  East central Clay County in northeastern Florida...
  Southeastern Duval County in northeastern Florida...

* Until 500 PM EST.

* At 421 PM EST, a severe thunderstorm was located over World Golf
  Village, or 9 miles southeast of Fruit Cove, moving northeast at 15
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Ponte Vedra Beach, World Golf Village, Bostwick, Palm Valley,
  Sawgrass, Nocatee, South Ponte Vedra, Bayard, Durbin and Picolata.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EST for northeastern
Florida.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2974 8166 3001 8164 3031 8136 3004 8129
TIME...MOT...LOC 2121Z 244DEG 11KT 3000 8150 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

HESS
3 follow-up statements
089 
WWUS52 KJAX 152137 RRA
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
437 PM EST Mon Feb 15 2021

FLC019-107-152147-
/O.CAN.KJAX.SV.W.0014.000000T0000Z-210215T2200Z/
Putnam FL-Clay FL-
437 PM EST Mon Feb 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL PUTNAM AND EAST
CENTRAL CLAY COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM EST for northeastern
Florida.

LAT...LON 2984 8156 2988 8160 2990 8161 2998 8159
      3027 8135 3004 8129
TIME...MOT...LOC 2137Z 244DEG 11KT 3002 8145 

$$

FLC031-109-152200-
/O.CON.KJAX.SV.W.0014.000000T0000Z-210215T2200Z/
St. Johns FL-Duval FL-
437 PM EST Mon Feb 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EST
FOR CENTRAL ST. JOHNS AND SOUTHEASTERN DUVAL COUNTIES...

At 437 PM EST, a severe thunderstorm was located over World Golf
Village, or 11 miles southeast of Fruit Cove, moving northeast at 15
mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
World Golf Village, Palm Valley, Sawgrass, Nocatee, South Ponte
Vedra, Durbin, Picolata, Guana River State Park and Bakersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EST for northeastern
Florida.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2984 8156 2988 8160 2990 8161 2998 8159
      3027 8135 3004 8129
TIME...MOT...LOC 2137Z 244DEG 11KT 3002 8145 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

HESS
851 
WWUS52 KJAX 152146
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
446 PM EST Mon Feb 15 2021

FLC031-152155-
/O.CAN.KJAX.SV.W.0014.000000T0000Z-210215T2200Z/
Duval FL-
446 PM EST Mon Feb 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DUVAL COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM EST for northeastern
Florida.

LAT...LON 2995 8141 2999 8146 3009 8146 3011 8144
      3012 8144 3023 8134 3004 8129
TIME...MOT...LOC 2145Z 234DEG 13KT 3007 8136 

$$

FLC109-152200-
/O.CON.KJAX.SV.W.0014.000000T0000Z-210215T2200Z/
St. Johns FL-
446 PM EST Mon Feb 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EST
FOR NORTH CENTRAL ST. JOHNS COUNTY...

At 445 PM EST, a severe thunderstorm was located over Guana River
State Park, or 12 miles south of Ponte Vedra Beach, moving northeast
at 15 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Sawgrass, Nocatee, South Ponte Vedra and Guana River State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM EST for northeastern
Florida.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2995 8141 2999 8146 3009 8146 3011 8144
      3012 8144 3023 8134 3004 8129
TIME...MOT...LOC 2145Z 234DEG 13KT 3007 8136 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$

HESS
742 
WWUS52 KJAX 152157
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
457 PM EST Mon Feb 15 2021

FLC109-152207-
/O.EXP.KJAX.SV.W.0014.000000T0000Z-210215T2200Z/
St. Johns FL-
457 PM EST Mon Feb 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ST. JOHNS COUNTY
WILL EXPIRE AT 500 PM EST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

A Tornado Watch remains in effect until 1000 PM EST for northeastern
Florida.

LAT...LON 2995 8141 2999 8146 3009 8146 3011 8144
      3012 8144 3023 8134 3004 8129
TIME...MOT...LOC 2157Z 244DEG 11KT 3008 8133 

$$

HESS

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 15, 2:10 PM EST, 2 hours 11 minutes earlier.

Area forecast discussion, Feb 15, 2:10 PM EST, 2 hours 11 minutes before
Area Forecast Discussion
National Weather Service Jacksonville FL
210 PM EST Mon Feb 15 2021

.NEAR TERM [Through Tonight]...

Late morning surface analysis showed a warm front lifting
northward from the I-4 corridor across N-central FL, while low
pressure (1008 millibars) was strengthening just south of New
Orleans and was beginning to accelerate northeastward. Aloft...an
intense cyclone over the Southern Plains states was pivoting
northeastward, with the base of this trough sweeping across Deep
South Texas and approaching the lower Mississippi Valley.
Convection was expanding ahead of a prefrontal trough over the
east central Gulf of Mexico. Deep southwesterly flow continues to
prevail locally ahead of this developing storm system, with a very
shallow east to southeasterly flow pattern in place locally just
to the north of the retreating warm front. Local fog, low stratus
and patches of drizzle prevail for locations north of a line from
Gainesville to St. Augustine, while breaks in the cloud cover are
appearing via latest GOES-East visible satellite imagery, and
temperatures and dewpoints at these locations were already rising
to near 70 degrees at 16Z, with temperatures and dewpoints
approaching 60 degrees elsewhere in northeast FL. Meanwhile,
temperatures and dewpoints were stuck in the upper 40s and lower
50s beneath the thick stratus deck across all of southeast GA.

Short-term, high resolution guidance still indicates that
scattered convection will initiate by the mid-afternoon hours over
north central FL along or just south of the retreating warm
front, generally along the US-301 corridor just east of
Gainesville. Otherwise, low pressure will continue to strengthen
as it accelerates northeastward across the FL panhandle early this
afternoon, with a squall line of strong to severe thunderstorms
taking shape ahead of this storm system's strengthening cold front
over the FL Panhandle and Srn AL early this afternoon. Breaks in
the low stratus cloudiness will continue to develop northward this
afternoon as the warm front lifts northward, allowing highs to
soar to the lower 80s for locations south of Gainesville and into
the 70s for locations south of Waycross by late afternoon as low
level winds veer to southeasterly and then southerly towards
sunset. Temperatures may struggle to reach the 60s before sunset
for locations north of Waycross and also along the southeast GA
coast.

Model soundings continue to depict MLCAPE values rising to
1500-2000 J/kg by late afternoon for locations east of Interstate
75 in northeast and north central FL and for locations south of
Waycross. South-southwesterly bulk shear values of 50-60 knots at
these locations could generate strong to isolated severe
convection for locations along and east of the US-301 corridor
late this afternoon, with just enough veering near the LCL height
to keep a threat for isolated tornadoes within this convective
activity as it approaches the I-95 corridor towards sunset. Shear
profiles may also be favorable for splitting supercells at these
locations. Activity will generally move quickly northeastward, and
downburst winds of 50-60 mph will be possible within stronger
activity along the I-95 corridor late this afternoon and early
this evening. Attention will then turn to the squall line of
strong to severe thunderstorms that will be approaching the
Altamaha and Ocmulgee Rivers shortly after sunset. This squall
line will bring a severe weather threat to the Suwannee Valley and
inland portions of southeast GA this evening. The primary hazard
would be damaging wind gusts of 50-60 mph within stronger cells
that would be embedded in the overall squall line. Southerly winds
will strengthen and will become breezy towards or shortly after
sunset area-wide, with temperatures rising through the 60s for
locations north of Waycross and likely remaining around 70
elsewhere.

The squall line is expected to weaken once it crosses
the US-301 corridor during the late evening hours, with activity
exiting the northeast FL coast shortly after midnight. A few
showers may develop overnight along the actual cold front, which
will likely not exit the Atlantic coast until around sunrise on
Tuesday. Breezy westerly winds in the wake of the front will usher
in colder air, with lows falling to the 40s from Waycross and
Jesup eastward, while lows remain in the 55-60 degree range along
the I-95 corridor and N-central FL.

.SHORT TERM [Tuesday Through Wednesday Night]...

A cooler, drier air mass will build over our area Tuesday and
Tuesday night. Highs will range from the low 50s in inland SE GA
to around 70 near FLagler Beach and Tuesday night will see lows in
the low-mid 30s in SE GA, low-mid 40s in NE FL. Frost is possible
Wednesday morning. During the afternoon on Wednesday, the cold
front that passed through will return as a warm front, bringing a
return of warmer temperatures, more humid conditions, and chances
for showers will increase to 40-60% again by Wednesday evening,
with isolated embedded thunderstorms possibly lingering into the
overnight hours. Highs Wednesday will range from the mid-upper
50s in SE GA to low 70s near Ocala and Flagler.

.LONG TERM [Thursday Through Monday]...

A deepening low pressure system with another cold front will
sweep across the southeast Thursday through Friday morning.
Thursday will be warm and windy ahead of the front. This
approaching system is very energetic and will once again bring
strong shear with it to the region and a strong low level jet.
Strong to severe storms are possible Thursday afternoon into early
Friday morning, so keep an eye on the forecast as we get closer
in time. Behind the front, a much colder and drier air mass will
build in again. Frost and freeze conditions look likely on
Saturday morning with frosty conditions again on Sunday morning.

&&

.AVIATION...
[Through 18Z Tuesday]

LIFR ceilings will prevail through around 19Z at SSI, with
improvement to IFR thereafter. IFR ceilings at the Duval County
terminals will gradually lift to MVFR by 20Z. MVFR ceilings at GNV
may briefly lift to VFR towards 20Z. Periods of MVFR or IFR
ceilings are possible this afternoon at SGJ. Showers and
thunderstorms will develop towards 19Z at GNV and will move
quickly north-northeastward, potentially impacting SGJ and the
Duval County terminals between 20Z-00Z. We added TEMPO groups to
these terminals for gusty winds and IFR conditions with potential
thunderstorm activity. Surface winds will shift to southerly by
00Z at the northeast FL terminals, with sustained surface speeds
increasing to 10-15 knots. A squall line of strong to severe
thunderstorms will then move across the FL panhandle early this
evening, potentially impacting the regional terminals after 02Z.
We have added TEMPO and PROB30 groups to each TAF forecast this
afternoon for gusty winds and potential IFR conditions during the
passage of this squall line, which should exit the SGJ terminal
before 07Z. Surface winds will then shift to southwesterly around
10 knots by 08Z at the terminals and westerly towards 11Z, with
sustained speeds increasing to 10-15 knots by 14Z. MVFR ceilings
are expected after 07Z, with improvement to VFR possible by 15Z
Tuesday.

&&

.MARINE...

Low pressure developing south of New Orleans will accelerate
northeastward across the Florida panhandle early this afternoon
and across the Carolinas this evening. This storm system will lift
a warm front northward from north central Florida late this
morning and through the Georgia waters early this evening,
followed by the passage of a strong cold front overnight. Showers
and a few thunderstorms will develop along and ahead of this front
from late afternoon through the overnight hours tonight. South-
southwesterly winds will also strengthen ahead of this front, with
Small Craft Advisory conditions expected offshore beginning this
evening. High pressure will briefly build over the Ohio Valley in
the wake of this front on Tuesday night and Wednesday as another
low pressure center develops over the western Gulf of Mexico and
lifts northeastward. A warm front will again move northward across
our waters on Wednesday afternoon and evening, followed by
another strong cold frontal passage and the potential for strong
thunderstorms on Thursday night and early Friday.

Rip Currents: Moderate risk through Tuesday.

&&

.FIRE WEATHER...

Strong to severe thunderstorms are possible through the evening. A
cold front will move through the area tonight, bringing cooler,
drier air for Tuesday. On Wednesday, that cold front will return as a
warm front and bring chances for scattered showers. On Thursday,
another cold front will approach the region, exiting our area Thursday
night. Showers and thunderstorms Thursday into Thursday night could
produce damaging wind gusts. Colder, drier air will move in Friday and
remain in place through the weekend.

&&

.HYDROLOGY...

Minor flooding continues along portions of the St. Marys, Little
Satilla, Alabaha, and Santa Fe Rivers, with minor flooding
expected to begin along upper portions of the Altamaha River
tonight and Tuesday. Minor flooding is also forecast to begin
along lower portions of the Satilla River later today.

&&

.PRELIMINARY POINT TEMPS/POPS...

AMG  45  54  32  55  50 /  80   0   0  40  60
SSI  55  63  41  59  54 /  60   0   0  50  60
JAX  55  65  41  63  55 /  60   0  10  50  50
SGJ  59  68  47  67  59 /  50  10  10  50  30
GNV  55  65  41  67  58 /  70   0  10  50  30
OCF  57  68  44  72  62 /  70  10  10  50  20

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...None.
GA...None.
AM...Small Craft Advisory from 7 PM this evening to 10 AM EST Tuesday
     for Waters from Altamaha Sound GA to Fernandina Beach FL
     from 20 to 60 NM-Waters from Fernandina Beach to St.
     Augustine FL from 20 to 60 NM-Waters from St. Augustine to
     Flagler Beach FL from 20 to 60 NM.

     Dense Fog Advisory until 2 PM EST this afternoon for Coastal
     waters from Altamaha Sound to Fernandina Beach FL out 20 NM-
     Coastal waters from Fernandina Beach to St. Augustine FL
     out 20 NM.

&&

In the hours before

Special weather statement, Feb 15, 3:00 PM EST, 1 hour 21 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
300 PM EST Mon Feb 15 2021

FLZ140-240-340-152045-
Central Marion FL-Western Marion FL-Eastern Marion FL-
300 PM EST Mon Feb 15 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MARION COUNTY UNTIL 345
PM EST...

* At 259 PM EST, National Weather Service meteorologists were
  tracking a strong thunderstorm near Santos, or 10 miles south of
  Ocala, moving north at 25 mph.

* Wind gusts up to 50 mph, funnel clouds, and minor flooding due to
  heavy rainfall is possible with this storm.

* Locations impacted include...
  Ocala, Fort McCoy, Citra, Sparr, Anthony, Silver Springs Shores,
  Santos, Ocala Airport, Belleview and Reddick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.

&&

LAT...LON 2942 8223 2943 8217 2942 8215 2943 8214
      2943 8209 2945 8205 2947 8191 2896 8204
      2896 8225
TIME...MOT...LOC 1959Z 190DEG 21KT 2902 8214

HESS
Special weather statement, Feb 15, 3:15 PM EST, 1 hour 6 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
315 PM EST Mon Feb 15 2021

FLZ032-037-152100-
Putnam FL-Clay FL-
315 PM EST Mon Feb 15 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN PUTNAM AND SOUTHERN
CLAY COUNTIES UNTIL 400 PM EST...

* At 314 PM EST, National Weather Service meteorologists were
  tracking a strong thunderstorm near Orange Springs, or 7 miles
  northeast of Citra, moving northeast at 20 mph.

* Wind gusts of 45 to 55 mph, funnel clouds, and minor flooding due
  to heavy rainfall is possible with this storm.

* Locations impacted include...
  Interlachen, Bostwick, Melrose Landing, George's Lake, Bardin,
  Hollister, Florahome, Johnson, Putnam Hall and Carraway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.

&&

A Tornado Watch remains in effect until 1000 PM EST for northern and
northeastern Florida.

LAT...LON 2952 8186 2951 8189 2951 8190 2950 8191
      2951 8194 2950 8197 2950 8200 2949 8203
      2947 8205 2964 8206 2998 8189 2989 8160
      2980 8157 2979 8155
TIME...MOT...LOC 2014Z 207DEG 15KT 2949 8203

HESS
Special weather statement, Feb 15, 3:18 PM EST, 1 hour 3 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
318 PM EST Mon Feb 15 2021

FLZ020-021-035-122-222-GAZ162-152115-
Southern Columbia FL-Hamilton FL-Suwannee FL-Northern Columbia FL-
Gilchrist FL-Echols GA-
318 PM EST Mon Feb 15 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN GILCHRIST...WESTERN
COLUMBIA...SUWANNEE...HAMILTON AND ECHOLS COUNTIES UNTIL 415 PM
EST...

* At 318 PM EST, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from 10 miles
  northeast of Perry to 10 miles north of Cross City. Movement was
  northeast at 45 mph.

* Small hail, funnel clouds, wind gusts up to 50 mph, and minor
  flooding due to heavy rainfall is possible with these storms.

* Locations impacted include...
  Lake City, Live Oak, Jasper, Jennings, White Springs, Statenville,
  Ichetucknee Spring, Suwannee River State Park, Suwannee Springs and
  Columbia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.

&&

A Tornado Watch remains in effect until 1000 PM EST for northern
Florida...and southeastern Georgia.

LAT...LON 3063 8314 3079 8313 3070 8261 2988 8264
      2977 8295 2980 8292 2981 8293 2983 8289
      2988 8287 2989 8292 2996 8293 3008 8307
      3012 8323 3026 8325 3039 8317 3042 8322
      3046 8322 3047 8324 3062 8327 3063 8331
TIME...MOT...LOC 2018Z 207DEG 38KT 3018 8343 2979 8314

HESS
Special weather statement, Feb 15, 3:46 PM EST, 35 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
346 PM EST Mon Feb 15 2021

FLZ037-140-240-152130-
Central Marion FL-Putnam FL-Eastern Marion FL-
346 PM EST Mon Feb 15 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MARION AND CENTRAL
PUTNAM COUNTIES UNTIL 430 PM EST...

* At 346 PM EST, National Weather Service meteorologists were
  tracking a strong thunderstorm over Fort McCoy, moving northeast at
  15 mph.

* Nickel size hail, funnel clouds, wind gusts of 50 to 55 mph, and
  minor flooding due to heavy rainfall is possible with this storm.

* Locations impacted include...
  Interlachen, Pomona Park, Fort McCoy, Lake Delancy, Sparr, Anthony,
  Orange Springs, Hollister, Satsuma and Welaka.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.

&&

A Tornado Watch remains in effect until 1000 PM EST for northern and
northeastern Florida.

LAT...LON 2929 8216 2944 8207 2944 8206 2946 8206
      2972 8190 2952 8154 2921 8206
TIME...MOT...LOC 2046Z 230DEG 15KT 2939 8198

HESS
Special weather statement, Feb 15, 4:13 PM EST, 8 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
413 PM EST Mon Feb 15 2021

FLZ020-021-GAZ162-163-152200-
Hamilton FL-Suwannee FL-Clinch GA-Echols GA-
413 PM EST Mon Feb 15 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SUWANNEE...
HAMILTON...ECHOLS AND NORTHWESTERN CLINCH COUNTIES UNTIL 500 PM
EST...

* At 413 PM EST, National Weather Service meteorologists were
  tracking showers and thunderstorms centerd near Jasper, moving
  northeast at 50 mph.

* Small hail and winds in excess of 45 mph possible with these
  storms.

* Locations impacted include...
  Live Oak, Jasper, Jennings, Suwannee Springs, Statenville, Suwannee
  River State Park, Du Pont, Mayday, Blue Springs and Crossroads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

&&

A Tornado Watch remains in effect until 1000 PM EST for northern
Florida...and southeastern Georgia.

LAT...LON 3063 8324 3063 8314 3078 8314 3080 8313
      3081 8310 3083 8310 3085 8308 3085 8301
      3087 8297 3114 8297 3092 8264 3025 8294
      3036 8319 3040 8318 3042 8322 3046 8322
      3047 8324 3052 8324 3055 8326
TIME...MOT...LOC 2113Z 208DEG 43KT 3049 8300

SHASHY
Special weather statement, Feb 15, 4:16 PM EST, 5 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
416 PM EST Mon Feb 15 2021

FLZ031>033-037-136-240-152200-
Eastern Alachua FL-Central Marion FL-Putnam FL-Bradford FL-Clay FL-
Inland St. Johns FL-
416 PM EST Mon Feb 15 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN BRADFORD...
SOUTHEASTERN ALACHUA...WEST CENTRAL ST. JOHNS...NORTH CENTRAL
MARION...NORTHWESTERN PUTNAM AND CLAY COUNTIES UNTIL 500 PM EST...

* At 416 PM EST, National Weather Service meteorologists were
  tracking a strong thunderstorm over Melrose Landing, or near
  Interlachen, moving north at 15 mph.

* Small hail, funnel clouds, wind gusts up to 50 mph, and minor
  flooding due to heavy rainfall is possible with this storm.

* Locations impacted include...
  Palatka, Green Cove Springs, Interlachen, Keystone Heights,
  Melrose, Middleburg, Citra, Hawthorne, Florahome and Melrose
  Landing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.

&&

A Tornado Watch remains in effect until 1000 PM EST for northern and
northeastern Florida.

LAT...LON 2936 8217 3004 8203 3013 8169 3012 8168
      3013 8165 2969 8162
TIME...MOT...LOC 2116Z 193DEG 14KT 2963 8198

HESS

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 15, 3:07 AM ESTSmall Craft AdvisoryJAX31 hr
Feb 15, 9:25 AM ESTMarine Dense Fog AdvisoryJAX5 hr
Feb 15, 2:23 PM ESTSpecial Weather StatementJAXPutnam52 min
Feb 15, 2:37 PM ESTTornado WarningJAXPutnam38 min
Feb 15, 2:53 PM ESTSpecial Weather StatementJAXSaint Johns52 min
Feb 15, 3:00 PM ESTSpecial Weather StatementJAXMarion45 min
Feb 15, 3:15 PM ESTSpecial Weather StatementJAXPutnam45 min
Feb 15, 3:18 PM ESTSpecial Weather StatementJAXHamilton, Suwannee57 min
Feb 15, 3:36 PM ESTTornado WarningJAXColumbia, Gilchrist, Suwannee39 min
Feb 15, 3:41 PM ESTSevere Thunderstorm WarningJAXClay, Putnam, Saint Johns49 min
Feb 15, 3:46 PM ESTSpecial Weather StatementJAXPutnam44 min
Feb 15, 4:04 PM ESTTornado WarningJAXPutnam, Saint Johns41 min
Feb 15, 4:09 PM ESTTornado WarningJAXColumbia, Hamilton, Suwannee36 min
Feb 15, 4:13 PM ESTSpecial Marine WarningJAX92 min
Feb 15, 4:13 PM ESTSpecial Weather StatementJAXHamilton47 min
Feb 15, 4:16 PM ESTSpecial Weather StatementJAXClay44 min
Feb 15, 4:43 PM ESTTornado WarningJAXSaint Johns17 min
Feb 15, 4:44 PM ESTSevere Thunderstorm WarningJAXBaker, Columbia46 min
Feb 15, 4:48 PM ESTSpecial Weather StatementJAXClay, Duval, Nassau57 min
Feb 15, 4:57 PM ESTTornado WarningJAXBaker33 min
Feb 15, 5:18 PM ESTSpecial Weather StatementJAXDuval27 min
Feb 15, 5:26 PM ESTSpecial Marine WarningJAX64 min
Feb 15, 5:53 PM ESTSpecial Weather StatementJAXNassau37 min
Feb 15, 6:17 PM ESTSpecial Weather StatementJAXGilchrist, Hamilton, Suwannee43 min
Feb 15, 6:22 PM ESTSpecial Marine WarningJAX64 min
Feb 15, 6:58 PM ESTSpecial Weather StatementJAXColumbia, Gilchrist, Hamilton, Suwannee62 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.