Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

August 1, 2021Duval County, Florida

NWS Jacksonville, FL issued this special weather statement at Aug 1, 2021, 6:53 PM EDT for Duval County, Florida. It was in force for 52 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 1, 2021, 6:53 PM EDT (22:53 UTC)
Expired
Aug 1, 2021, 7:45 PM EDT
In force
52 min
Issued by
NWS Jacksonville, FL

County Duval County, FL

The radar

The Jacksonville radar (KJAX), 35 km from the middle of the area, began a volume at 22:54 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, 10.9 hours before the alert went out and 36 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 2021-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2380 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 2021-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
2380 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
667 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
42 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 1, 6:25 PM EDT, 28 minutes earlier.

Area forecast discussion, Aug 1, 6:25 PM EDT, 28 minutes before
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In the hours before

Special weather statement, Aug 1, 5:25 PM EDT, 1 hour 28 minutes before
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Special weather statement, Aug 1, 5:58 PM EDT, 55 minutes before
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Special weather statement, Aug 1, 6:09 PM EDT, 44 minutes before
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Special weather statement, Aug 1, 6:23 PM EDT, 30 minutes before
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Special weather statement, Aug 1, 6:45 PM EDT, 8 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
645 PM EDT Sun Aug 1 2021

FLZ020-021-012330-
Hamilton FL-Suwannee FL-
645 PM EDT Sun Aug 1 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SUWANNEE AND HAMILTON
COUNTIES UNTIL 730 PM EDT...

* At 644 PM EDT, National Weather Service meteorologists were
  tracking a clusters of showers and thunderstorms centered
  just south of Jennings, moving southeast at 20 mph.

* Winds in excess of 40 mph possible with these storms.

* Locations impacted include...
  Live Oak, Jasper, Suwannee Springs, Suwannee River State Park,
  Belmont, Blue Springs, Crossroads, Newburn and Houston.

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 3063 8314 3059 8312 3056 8274 3046 8271
      3024 8289 3028 8323 3030 8323 3031 8321
      3035 8321 3035 8319 3038 8319 3039 8317
      3041 8318 3042 8322 3046 8322 3047 8324
      3052 8324 3063 8326
TIME...MOT...LOC 2244Z 306DEG 19KT 3057 8315

SHASHY
Special weather statement, Aug 1, 6:53 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
653 PM EDT Sun Aug 1 2021

FLZ125-133-225-325-425-012345-
Coastal St. Johns FL-Western Duval FL-South Central Duval FL-
Trout River FL-Coastal Duval FL-
653 PM EDT Sun Aug 1 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL ST. JOHNS AND
EASTERN DUVAL COUNTIES UNTIL 745 PM EDT...

* At 652 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm over Jacksonville, moving east at 20
  mph.

* Winds of 40 to 50 mph and minor flooding due to heavy rainfall is
  possible with this storm.

* Locations impacted include...
  Jacksonville, Unf, Arlington, Ponte Vedra Beach, Neptune Beach,
  Sawgrass, Baymeadows, Ortega, Craig Field and San Pablo.

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 3009 8136 3027 8179 3048 8166 3043 8137
      3025 8135 3018 8132
TIME...MOT...LOC 2252Z 291DEG 19KT 3035 8166

SHASHY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 2:14 PM EDTSpecial Marine WarningJAX61 min
Aug 1, 3:02 PM EDTSpecial Marine WarningJAX71 min
Aug 1, 3:10 PM EDTSpecial Weather StatementJAXNassau35 min
Aug 1, 3:38 PM EDTSpecial Marine WarningJAX97 min
Aug 1, 4:49 PM EDTSpecial Marine WarningJAX56 min
Aug 1, 5:18 PM EDTSpecial Weather StatementJAXNassau42 min
Aug 1, 5:58 PM EDTSpecial Weather StatementJAXNassau62 min
Aug 1, 6:23 PM EDTSpecial Weather StatementJAXNassau52 min
Aug 1, 6:45 PM EDTSpecial Weather StatementJAXHamilton45 min
Aug 1, 7:16 PM EDTSpecial Weather StatementJAXBaker59 min
Aug 1, 7:34 PM EDTSpecial Weather StatementJAXColumbia, Suwannee56 min
Jul 31, 10:06 PM EDTSpecial Weather StatementJAXBacon, Coffee39 min
Jul 31, 10:35 PM EDTSpecial Weather StatementJAXBacon, Brantley, Pierce40 min
Aug 1, 3:12 PM EDTSpecial Weather StatementJAXCoffee48 min
Aug 1, 3:28 PM EDTSpecial Weather StatementJAXAtkinson47 min
Aug 1, 3:46 PM EDTSpecial Weather StatementJAXCamden, Ware59 min
Aug 1, 3:57 PM EDTSpecial Weather StatementJAXBacon, Coffee48 min
Aug 1, 4:10 PM EDTSpecial Weather StatementJAXClinch50 min
Aug 1, 4:39 PM EDTSpecial Weather StatementJAXPierce51 min
Aug 1, 4:42 PM EDTSpecial Weather StatementJAXAtkinson48 min
Aug 1, 4:44 PM EDTSpecial Weather StatementJAXWare46 min
Aug 1, 4:47 PM EDTSpecial Weather StatementJAXCamden43 min
Aug 1, 5:20 PM EDTSpecial Weather StatementJAXClinch55 min
Aug 1, 5:25 PM EDTSpecial Weather StatementJAXCharlton50 min
Aug 1, 6:09 PM EDTSpecial Weather StatementJAXClinch, Echols51 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.