Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 78, NWS Jacksonville, FL

June 3, 2021Flagler County, Putnam County, Saint Johns County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 3, 2021, 4:30 PM EDT for Flagler County, Putnam County, Saint Johns County, Florida. It was in force for 18 min. 1 report 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: Jun 3, 2021, 4:30 PM EDT (20:30 UTC)
Expired: Jun 3, 2021, 4:48 PM EDT
In force: 18 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Flagler County, FL, Putnam County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 94 km from the middle of the area, began a volume at 20:32 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

Time	Report	Where	Remark
Jun 3, 4:45 PM EDT	TSTM WND DMG	E Hastings, FL	911 CALL CENTER REPORTED TREE DOWN ON NORTH FIRST STREET IN HASTINGS.

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

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.5 hours before the alert went out and 96 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: 587 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

237 
WUUS52 KJAX 032030
SVRJAX
FLC035-107-109-032100-
/O.NEW.KJAX.SV.W.0078.210603T2030Z-210603T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
430 PM EDT Thu Jun 3 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Northwestern Flagler County in northeastern Florida...
  South central St. Johns County in northeastern Florida...
  East central Putnam County in northeastern Florida...

* Until 500 PM EDT.

* At 429 PM EDT, a severe thunderstorm was located near Hastings,
  moving northeast at 10 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Hastings, East Palatka, Orange Mills, Spuds and Elkton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 2957 8145 2967 8163 2980 8143 2972 8133
TIME...MOT...LOC 2029Z 213DEG 11KT 2967 8148 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DD

1 follow-up statement

525 
WWUS52 KJAX 032048
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
448 PM EDT Thu Jun 3 2021

FLC035-107-109-032058-
/O.CAN.KJAX.SV.W.0078.000000T0000Z-210603T2100Z/
Flagler FL-St. Johns FL-Putnam FL-
448 PM EDT Thu Jun 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FLAGLER...SOUTH
CENTRAL ST. JOHNS AND EAST CENTRAL PUTNAM COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 2957 8145 2967 8163 2980 8143 2972 8133
TIME...MOT...LOC 2044Z 213DEG 11KT 2972 8144 

$$

DD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 3:48 PM EDT	Special Weather Statement	JAX	Saint Johns	42 min
Jun 3, 4:21 PM EDT	Special Weather Statement	JAX	Saint Johns	39 min
Jun 3, 5:24 PM EDT	Special Weather Statement	JAX	Marion	36 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every 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.