Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

August 22, 2021Bradford County, Clay County, Union County, Florida

NWS Jacksonville, FL issued this special weather statement at Aug 22, 2021, 3:09 PM EDT for Bradford County, Clay County, Union County, Florida. It was in force for 51 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
Aug 22, 2021, 3:09 PM EDT (19:09 UTC)
Expired
Aug 22, 2021, 4:00 PM EDT
In force
51 min
Issued by
NWS Jacksonville, FL
Hail
0.00 in
Wind
50

Counties Bradford County, FL, Clay County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 57 km from the middle of the area, began a volume at 19:08 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, 7.2 hours before the alert went out and 58 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 2021-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 772 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 2021-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
772 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Aug 22, 1:38 PM EDT, 1 hour 31 minutes earlier.

Area forecast discussion, Aug 22, 1:38 PM EDT, 1 hour 31 minutes before
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In the hours before

Special weather statement, Aug 22, 1:46 PM EDT, 1 hour 23 minutes before
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Special weather statement, Aug 22, 1:56 PM EDT, 1 hour 13 minutes before
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Special weather statement, Aug 22, 2:22 PM EDT, 47 minutes before
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Special weather statement, Aug 22, 2:28 PM EDT, 41 minutes before
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Special weather statement, Aug 22, 3:04 PM EDT, 5 minutes before
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Special weather statement, Aug 22, 3:09 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
309 PM EDT Sun Aug 22 2021

FLZ023-024-030-031-136-222-232-236-237-425-222000-
Eastern Alachua FL-Southern Columbia FL-Western Alachua FL-Baker FL-
Western Clay FL-Union FL-Western Duval FL-Western Putnam FL-
Inland Nassau FL-Bradford FL-
309 PM EDT Sun Aug 22 2021

...Strong thunderstorms will impact portions of southwestern Nassau,
Bradford, northern Alachua, southern Baker, northwestern Putnam,
Union, southeastern Columbia, western Clay and southwestern Duval
Counties through 400 PM EDT...

At 309 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Olustee to near Alachua. Movement was east at
20 mph.

HAZARD...Wind gusts up to 50 mph, excessive cloud-to-ground
         lightning, and minor flooding due to heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Excessive cloud-to-ground lightning is
         occurring. Minor flooding due to heavy rainfall is
         possible.

Locations impacted include...
Starke, Lake Butler, Keystone Heights, Raiford, Melrose, Worthington
Spring, Middleburg, Alachua, Macclenny and Glen St. Mary.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3022 8248 3036 8209 3036 8206 3038 8204
      3045 8184 2968 8185 2972 8258
TIME...MOT...LOC 1909Z 265DEG 17KT 3020 8245 2977 8253

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

HESS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 1:14 PM EDTSpecial Weather StatementJAXSuwannee46 min
Aug 22, 1:32 PM EDTSpecial Weather StatementJAXBaker43 min
Aug 22, 1:46 PM EDTSpecial Weather StatementJAXColumbia, Suwannee44 min
Aug 22, 2:22 PM EDTSpecial Weather StatementJAXHamilton53 min
Aug 22, 2:28 PM EDTSpecial Weather StatementJAXBaker, Columbia, Gilchrist, Union47 min
Aug 22, 3:47 PM EDTSpecial Weather StatementJAXFlagler28 min
Aug 22, 3:51 PM EDTSpecial Weather StatementJAXClay, Duval, Saint Johns39 min
Aug 22, 4:11 PM EDTSpecial Marine WarningJAX94 min
Aug 22, 4:16 PM EDTSpecial Weather StatementJAXFlagler29 min
Aug 22, 4:27 PM EDTSpecial Weather StatementJAXDuval, Saint Johns48 min
Aug 22, 4:34 PM EDTSpecial Weather StatementJAXPutnam26 min
Aug 22, 4:38 PM EDTSpecial Weather StatementJAXFlagler37 min
Aug 22, 4:45 PM EDTSevere Thunderstorm WarningJAXDuval20 min
Aug 22, 5:34 PM EDTSpecial Marine WarningJAX86 min
Aug 22, 1:56 PM EDTSpecial Weather StatementJAXClinch34 min
Aug 22, 3:04 PM EDTSpecial Weather StatementJAXClinch, Echols41 min
Aug 22, 3:40 PM EDTSpecial Weather StatementJAXJeff Davis35 min
Aug 22, 3:57 PM EDTSpecial Weather StatementJAXBrantley, Camden, Glynn, Wayne48 min
Aug 22, 4:14 PM EDTSpecial Weather StatementJAXAppling, Bacon, Coffee, Jeff Davis46 min
Aug 22, 4:46 PM EDTSpecial Weather StatementJAXGlynn, Wayne29 min
Aug 22, 5:01 PM EDTSpecial Weather StatementJAXAppling, Bacon, Wayne44 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.