Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

June 28, 2021Gilchrist County, Florida

NWS Jacksonville, FL issued this special weather statement at Jun 28, 2021, 2:21 PM EDT for Gilchrist County, Florida. It was in force for 39 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
Jun 28, 2021, 2:21 PM EDT (18:21 UTC)
Expired
Jun 28, 2021, 3:00 PM EDT
In force
39 min
Issued by
NWS Jacksonville, FL

County Gilchrist County, FL

The radar

The Jacksonville radar (KJAX), 129 km from the middle of the area, began a volume at 18:19 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, 6.4 hours before the alert went out and 130 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 2021-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1938 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.193958Sfc1 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
1938 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
628 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
-35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

181 
WWUS82 KJAX 281821
SPSJAX

Special Weather Statement
National Weather Service Jacksonville FL
221 PM EDT Mon Jun 28 2021
 
FLZ035-236-281900-
Western Alachua FL-Gilchrist FL-
221 PM EDT Mon Jun 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GILCHRIST AND
NORTHWESTERN ALACHUA COUNTIES UNTIL 300 PM EDT...

* At 220 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm 7 miles south of High Springs, or 12
  miles northeast of Trenton, moving west at 15 mph.

* Winds in excess of 45 mph and minor flooding due to heavy rainfall
  is possible with this storm.

* Locations impacted include...
  Trenton, Bell, High Springs and Newberry. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 2977 8289 2983 8267 2983 8264 2985 8263
      2987 8255 2968 8248 2956 8269 2956 8275
      2958 8276 2958 8282
TIME...MOT...LOC 1820Z 068DEG 12KT 2970 8262 

$$

KB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 11:54 AM EDTSpecial Weather StatementJAXBradford36 min
Jun 28, 1:17 PM EDTSpecial Weather StatementJAXClay43 min
Jun 28, 1:24 PM EDTSpecial Weather StatementJAXPutnam51 min
Jun 28, 1:59 PM EDTSpecial Weather StatementJAXSaint Johns46 min
Jun 28, 2:07 PM EDTSpecial Weather StatementJAXColumbia53 min
Jun 28, 2:53 PM EDTSpecial Weather StatementJAXGilchrist52 min

Nearby

Special Weather Statements in Florida, 2021Every 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.