Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

March 31, 20216 counties in Florida

NWS Jacksonville, FL issued this special weather statement at Mar 31, 2021, 10:30 PM EDT for 6 counties in Florida. It was in force for 45 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 31, 2021, 10:30 PM EDT (02:30 UTC)
Expired: Mar 31, 2021, 11:15 PM EDT
In force: 45 min
Issued by: NWS Jacksonville, FL

Counties Alachua County, FL, Bradford County, FL, Clay County, FL, Gilchrist County, FL, Putnam County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 123 km from the middle of the area, began a volume at 02:31 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 2.5 hours before the alert went out and 191 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: 1037 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Mar 31, 9:52 PM EDT, 38 minutes earlier.

Area forecast discussion, Mar 31, 9:52 PM EDT, 38 minutes before

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In the hours before

Special weather statement, Mar 31, 6:39 PM EDT, 3 hours 51 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
639 PM EDT Wed Mar 31 2021

GAZ132>135-149-312330-
Bacon GA-Atkinson GA-Appling GA-Coffee GA-Jeff Davis GA-
639 PM EDT Wed Mar 31 2021

...SIGNIFICANT WEATHER ADVISORY FOR COFFEE...NORTHWESTERN ATKINSON...
NORTHWESTERN BACON...JEFF DAVIS AND NORTHWESTERN APPLING COUNTIES
UNTIL 730 PM EDT...

* At 637 PM EDT, a line of strong thunderstorms extended along a
  line from near Alamo to 9 miles northwest of Ambrose to near
  Norman Park. Movement was east at 35 mph.

* Winds gusts up to 45 mph have been reported with these storms.

* Locations impacted include...
  Douglas, Baxley, Hazlehurst, Alma, Willacoochee, Broxton, Ambrose,
  Graham, Plant Hatch and Nicholls.

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.

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 3190 8217 3159 8238 3123 8305 3128 8303
      3140 8314 3146 8315 3151 8308 3161 8306
      3166 8300 3179 8299 3178 8287 3192 8268
      3193 8259 3196 8256 3195 8249 3197 8248
TIME...MOT...LOC 2237Z 255DEG 32KT 3213 8275 3171 8310 3129 8373

ENYEDI

Special weather statement, Mar 31, 7:27 PM EDT, 3 hours 3 minutes before

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Special weather statement, Mar 31, 10:04 PM EDT, 26 minutes before

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Local storm report, Mar 31, 10:10 PM EDT, 20 minutes before

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Special weather statement, Mar 31, 10:23 PM EDT, 7 minutes before

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Special weather statement, Mar 31, 10:30 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 10:04 PM EDT	Special Weather Statement	JAX	Bradford, Gilchrist, Union	41 min
Mar 31, 10:23 PM EDT	Special Weather Statement	JAX	Duval	52 min
Mar 31, 10:26 PM EDT	Special Marine Warning	JAX		64 min
Mar 31, 11:14 PM EDT	Special Weather Statement	JAX	Flagler, Marion, Putnam, Saint Johns	46 min
Mar 31, 11:17 PM EDT	Special Marine Warning	JAX		58 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.