Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

June 7, 2021Saint Johns County, Florida

NWS Jacksonville, FL issued this special weather statement at Jun 7, 2021, 4:18 PM EDT for Saint Johns County, Florida. It was in force for 27 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 7, 2021, 4:18 PM EDT (20:18 UTC)
Expired
Jun 7, 2021, 4:45 PM EDT
In force
27 min
Issued by
NWS Jacksonville, FL

County Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 71 km from the middle of the area, began a volume at 20:18 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, 8.3 hours before the alert went out and 72 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 2021-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1198 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 2021-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
1198 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
709 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
22 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 Jun 7, 3:36 PM EDT, 42 minutes earlier.

Area forecast discussion, Jun 7, 3:36 PM EDT, 42 minutes before
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In the hours before

Special weather statement, Jun 7, 2:59 PM EDT, 1 hour 19 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
259 PM EDT Mon Jun 7 2021

FLZ125-225-325-071930-
South Central Duval FL-Trout River FL-Coastal Duval FL-
259 PM EDT Mon Jun 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DUVAL COUNTY UNTIL 330 PM
EDT...

* At 258 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm over Arlington. This storm was
  nearly stationary.

* Winds in excess of 45 mph possible with this storm.

* Locations impacted include...
  Arlington, San Marco and Tallyrand.

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.

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 3024 8158 3028 8167 3043 8167 3041 8159
TIME...MOT...LOC 1858Z 178DEG 4KT 3033 8163

CORLESS
Special weather statement, Jun 7, 3:09 PM EDT, 1 hour 9 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
309 PM EDT Mon Jun 7 2021

FLZ033-125-325-071945-
South Central Duval FL-Coastal Duval FL-Inland St. Johns FL-
309 PM EDT Mon Jun 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ST. JOHNS AND
SOUTHEASTERN DUVAL COUNTIES UNTIL 345 PM EDT...

* At 308 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm over Fruit Cove, moving north at 15
  mph.

* Winds in excess of 45 mph possible with this storm.

* Locations impacted include...
  Fruit Cove and Mandarin.

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.

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 3007 8153 3003 8162 3024 8167 3023 8153
TIME...MOT...LOC 1908Z 163DEG 11KT 3013 8160

CORLESS
Special weather statement, Jun 7, 3:29 PM EDT, 49 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
329 PM EDT Mon Jun 7 2021

FLZ125-225-325-425-072000-
Western Duval FL-South Central Duval FL-Trout River FL-
Coastal Duval FL-
329 PM EDT Mon Jun 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DUVAL COUNTY UNTIL 400 PM
EDT...

* At 328 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm over Arlington, moving north at 5
  mph.

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

* Locations impacted include...
  Jacksonville, Arlington, Baymeadows, San Marco, Riverside and
  Tallyrand.

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.

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 3023 8154 3024 8168 3044 8171 3043 8159
TIME...MOT...LOC 1928Z 178DEG 6KT 3032 8162

CORLESS
Special weather statement, Jun 7, 3:32 PM EDT, 46 minutes before
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Local storm report, Jun 7, 3:41 PM EDT, 37 minutes before
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Special weather statement, Jun 7, 4:18 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 8:08 PM EDTSpecial Weather StatementJAXColumbia, Union52 min
Jun 6, 8:27 PM EDTSpecial Weather StatementJAXAlachua33 min
Jun 6, 8:30 PM EDTSpecial Weather StatementJAXHamilton30 min
Jun 6, 8:55 PM EDTSpecial Weather StatementJAXBaker, Union35 min
Jun 7, 2:29 PM EDTSpecial Weather StatementJAXDuval31 min
Jun 7, 2:41 PM EDTSpecial Weather StatementJAXNassau34 min
Jun 7, 2:59 PM EDTSpecial Weather StatementJAXDuval31 min
Jun 7, 3:09 PM EDTSpecial Weather StatementJAXDuval36 min
Jun 7, 3:29 PM EDTSpecial Weather StatementJAXDuval31 min
Jun 7, 3:32 PM EDTSpecial Weather StatementJAXSuwannee28 min
Jun 6, 9:20 PM EDTSpecial Weather StatementJAXClinch25 min
Jun 6, 9:43 PM EDTSpecial Weather StatementJAXClinch32 min
Jun 6, 10:05 PM EDTSpecial Weather StatementJAXLanier40 min
Jun 7, 1:55 PM EDTSpecial Weather StatementJAXLanier35 min
Jun 7, 5:46 PM EDTSpecial Weather StatementJAXWare29 min
Jun 7, 6:30 PM EDTSpecial Weather StatementJAXPierce30 min
Jun 7, 6:34 PM EDTSpecial Weather StatementJAXCoffee41 min
Jun 7, 7:06 PM EDTSpecial Weather StatementJAXCoffee, Jeff Davis24 min
Jun 7, 7:43 PM EDTSpecial Weather StatementJAXCoffee, Jeff Davis47 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.