Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

October 8, 2021Duval County, Florida

NWS Jacksonville, FL issued this special weather statement at Oct 8, 2021, 12:42 PM EDT for Duval County, Florida. It was in force for 33 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
Oct 8, 2021, 12:42 PM EDT (16:42 UTC)
Expired
Oct 8, 2021, 1:15 PM EDT
In force
33 min
Issued by
NWS Jacksonville, FL
Hail
0.25 in
Wind
50

County Duval County, FL

The radar

The Jacksonville radar (KJAX), 36 km from the middle of the area, began a volume at 16:45 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, 4.7 hours before the alert went out and 37 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 2021-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2220 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 2021-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
2220 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
756 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

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 Oct 8, 9:48 AM EDT, 2 hours 54 minutes earlier.

Area forecast discussion, Oct 8, 9:48 AM EDT, 2 hours 54 minutes before
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In the hours before

Local storm report, Oct 8, 12:05 PM EDT, 37 minutes before
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Special weather statement, Oct 8, 12:05 PM EDT, 37 minutes before
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Special weather statement, Oct 8, 12:14 PM EDT, 28 minutes before
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Special weather statement, Oct 8, 12:37 PM EDT, 5 minutes before
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Special weather statement, Oct 8, 12:40 PM EDT, 2 minutes before
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Special weather statement, Oct 8, 12:42 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
1242 PM EDT Fri Oct 8 2021

FLZ033-124-125-132-133-325-081715-
Eastern Clay FL-Coastal St. Johns FL-South Central Duval FL-
Coastal Nassau FL-Coastal Duval FL-Inland St. Johns FL-
1242 PM EDT Fri Oct 8 2021

...Strong thunderstorms will impact portions of northwestern St.
Johns and southeastern Duval Counties through 115 PM EDT...

At 1242 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Little Talbot Island to near San Pablo to
near Green Cove Springs. Movement was northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph, pea size hail, and minor flooding
         due to heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible. Minor flooding due to heavy rainfall is possible.

Locations impacted include...
Unf, Fruit Cove, Ponte Vedra Beach, Neptune Beach, Sawgrass,
Baymeadows, Nocatee, Durbin, Craig Field and San Pablo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 2997 8164 3030 8161 3044 8155 3058 8140
      3025 8135 3003 8127
TIME...MOT...LOC 1642Z 242DEG 21KT 3045 8149 3027 8145 2999 8161

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

ENYEDI

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 8, 10:47 AM EDTSpecial Marine WarningJAX72 min
Oct 8, 11:04 AM EDTSpecial Weather StatementJAXSuwannee26 min
Oct 8, 11:29 AM EDTSpecial Weather StatementJAXSuwannee46 min
Oct 8, 11:35 AM EDTSpecial Marine WarningJAX73 min
Oct 8, 11:45 AM EDTSpecial Weather StatementJAXNassau30 min
Oct 8, 12:05 PM EDTSpecial Weather StatementJAXDuval40 min
Oct 8, 12:11 PM EDTSpecial Marine WarningJAX94 min
Oct 8, 12:14 PM EDTSpecial Weather StatementJAXNassau31 min
Oct 8, 12:37 PM EDTSpecial Weather StatementJAXBaker23 min
Oct 8, 12:40 PM EDTSpecial Weather StatementJAXNassau20 min
Oct 8, 1:03 PM EDTSpecial Marine WarningJAX57 min
Oct 8, 1:20 PM EDTSpecial Weather StatementJAXSaint Johns40 min
Oct 8, 1:23 PM EDTSpecial Marine WarningJAX67 min
Oct 8, 1:46 PM EDTSpecial Marine WarningJAX89 min
Oct 8, 2:02 PM EDTSpecial Marine WarningJAX58 min
Oct 8, 2:09 PM EDTSpecial Marine WarningJAX96 min
Oct 8, 2:23 PM EDTSpecial Weather StatementJAXPutnam52 min
Oct 8, 2:29 PM EDTSpecial Weather StatementJAXMarion46 min
Oct 8, 2:47 PM EDTSevere Thunderstorm WarningJAXFlagler, Putnam, Saint Johns28 min
Oct 8, 3:17 PM EDTSpecial Marine WarningJAX88 min
Oct 8, 3:18 PM EDTSpecial Weather StatementJAXMarion27 min
Oct 8, 3:28 PM EDTSpecial Weather StatementJAXFlagler32 min
Oct 8, 3:46 PM EDTSpecial Weather StatementJAXLake29 min
Oct 8, 4:44 PM EDTSpecial Weather StatementJAXMarion31 min
Oct 8, 6:27 AM EDTSpecial Weather StatementJAXCoffee48 min
Oct 8, 6:46 AM EDTSevere Thunderstorm WarningJAXCoffee29 min
Oct 8, 7:15 AM EDTSevere Thunderstorm WarningJAXCoffee, Jeff Davis60 min
Oct 8, 7:23 AM EDTSpecial Weather StatementJAXAppling52 min
Oct 8, 7:37 AM EDTSpecial Weather StatementJAXCoffee23 min
Oct 8, 7:53 AM EDTSevere Thunderstorm WarningJAXAppling, Atkinson, Bacon, Coffee, Jeff Davis52 min
Oct 8, 7:58 AM EDTAreal Flood WarningJAXCoffee, Jeff Davis3 hr
Oct 8, 8:41 AM EDTSpecial Weather StatementJAXBacon34 min
Oct 8, 8:46 AM EDTSevere Thunderstorm WarningJAXAppling, Wayne44 min
Oct 8, 8:49 AM EDTSpecial Weather StatementJAXAtkinson, Bacon, Pierce26 min
Oct 8, 9:18 AM EDTSpecial Weather StatementJAXAtkinson, Bacon, Pierce57 min
Oct 8, 9:19 AM EDTSpecial Weather StatementJAXWayne56 min
Oct 8, 9:41 AM EDTSpecial Weather StatementJAXBrantley, Pierce, Wayne34 min
Oct 8, 10:15 AM EDTSpecial Weather StatementJAXBrantley, Glynn, Wayne30 min
Oct 8, 10:26 AM EDTSpecial Weather StatementJAXClinch, Echols, Ware49 min
Oct 8, 10:41 AM EDTSpecial Weather StatementJAXGlynn49 min
Oct 8, 10:44 AM EDTSevere Thunderstorm WarningJAXBrantley, Camden, Glynn, Wayne31 min
Oct 8, 10:57 AM EDTSpecial Weather StatementJAXCharlton33 min
Oct 8, 11:24 AM EDTSpecial Weather StatementJAXCamden36 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.