Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

May 6, 2021Marion County, Florida

NWS Jacksonville, FL issued this special weather statement at May 6, 2021, 12:21 PM EDT for Marion County, Florida. It was in force for 24 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: May 6, 2021, 12:21 PM EDT (16:21 UTC)
Expired: May 6, 2021, 12:45 PM EDT
In force: 24 min
Issued by: NWS Jacksonville, FL

County Marion County, FL

The radar

The Melbourne radar (KMLB), 148 km from the middle of the area, began a volume at 16:22 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 4.4 hours before the alert went out and 137 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: 712 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 989 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

758 
WWUS82 KJAX 061621
SPSJAX

Special Weather Statement
National Weather Service Jacksonville FL
1221 PM EDT Thu May 6 2021
 
FLZ140-061645-
Eastern Marion FL-
1221 PM EDT Thu May 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MARION COUNTY UNTIL
1245 PM EDT...

* At 1221 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm near Pittman, or 8 miles northeast
  of Emeralda, moving east at 30 mph.

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

* This storm will remain over mainly rural areas of southeastern
  Marion County.

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.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

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 2897 8184 2900 8184 2917 8180 2916 8164
      2905 8164 2905 8166 2896 8166 2896 8181
TIME...MOT...LOC 1621Z 281DEG 24KT 2905 8173 

$$

AK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 9:15 AM EDT	Special Weather Statement	JAX	Bradford, Union	45 min
May 6, 11:13 AM EDT	Special Weather Statement	JAX	Bradford, Clay, Union	47 min
May 6, 11:43 AM EDT	Special Weather Statement	JAX	Marion	47 min
May 6, 1:02 PM EDT	Special Weather Statement	JAX	Flagler	43 min
May 6, 1:19 PM EDT	Severe Thunderstorm Warning	JAX	Flagler, Putnam	41 min

Nearby

Special Weather Statements in Florida, 2021 Every special weather statement 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.