Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 25, NWS Jacksonville, FL

March 30, 2021Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Mar 30, 2021, 6:45 PM EDT for Marion County, Florida. It was in force for 16 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 30, 2021, 6:45 PM EDT (22:45 UTC)
Expired: Mar 30, 2021, 7:01 PM EDT
In force: 16 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Marion County, FL

The radar

The Jacksonville radar (KJAX), 145 km from the middle of the area, began a volume at 22:59 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, 10.8 hours before the alert went out and 147 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: 360 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 943 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.5

Open this sounding in Storm Lab

The text

As transmitted.

597 
WUUS52 KJAX 302245
SVRJAX
FLC083-302330-
/O.NEW.KJAX.SV.W.0025.210330T2245Z-210330T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
645 PM EDT Tue Mar 30 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Central Marion County in northern Florida...

* Until 730 PM EDT.

* At 645 PM EDT, a severe thunderstorm was located near Ocala, moving
  east at 15 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Ocala, Anthony and Burbank. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2921 8221 2931 8216 2929 8194 2912 8200
TIME...MOT...LOC 2245Z 278DEG 12KT 2923 8214 

HAIL...0.75IN
WIND...60MPH
 
$$

KB

1 follow-up statement

639 
WWUS52 KJAX 302301
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
701 PM EDT Tue Mar 30 2021

FLC083-302311-
/O.CAN.KJAX.SV.W.0025.000000T0000Z-210330T2330Z/
Marion FL-
701 PM EDT Tue Mar 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MARION COUNTY 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 heavy rain is
still possible with this thunderstorm.

LAT...LON 2921 8221 2931 8216 2929 8194 2912 8200
TIME...MOT...LOC 2259Z 278DEG 12KT 2922 8208 

$$

KB

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 2:07 AM EDT	Special Weather Statement	JAX	Gilchrist	38 min
Mar 30, 5:08 AM EDT	Special Weather Statement	JAX	Bradford	37 min
Mar 30, 5:28 AM EDT	Special Weather Statement	JAX	Bradford, Clay, Union	47 min
Mar 30, 5:57 AM EDT	Special Weather Statement	JAX	Bradford, Clay	48 min
Mar 30, 6:37 AM EDT	Special Weather Statement	JAX	Bradford, Clay	53 min
Mar 30, 6:43 AM EDT	Special Weather Statement	JAX	Gilchrist	47 min
Mar 30, 7:33 AM EDT	Special Weather Statement	JAX	Bradford, Gilchrist, Union	57 min
Mar 30, 8:02 AM EDT	Areal Flood Warning	JAX	Bradford	3 hr
Mar 30, 8:51 AM EDT	Flash Flood Warning	JAX	Bradford	76 min
Mar 30, 10:52 AM EDT	Special Weather Statement	JAX	Suwannee	38 min
Mar 30, 5:27 PM EDT	Special Weather Statement	JAX	Gilchrist	48 min
Mar 30, 5:53 PM EDT	Special Weather Statement	JAX	Marion	52 min
Mar 30, 6:00 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Marion	45 min
Mar 30, 6:16 PM EDT	Areal Flood Warning	JAX	Marion	119 min
Mar 30, 6:39 PM EDT	Special Weather Statement	JAX	Marion	51 min
Mar 30, 6:52 PM EDT	Special Weather Statement	JAX	Alachua	38 min
Mar 30, 7:01 PM EDT	Areal Flood Warning	JAX	Alachua	89 min
Mar 30, 7:27 PM EDT	Areal Flood Warning	JAX	Alachua	93 min
Mar 30, 7:29 PM EDT	Special Weather Statement	JAX	Alachua	46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.