Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

July 12, 2021Marion County, Florida

NWS Jacksonville, FL issued this special weather statement at Jul 12, 2021, 3:13 PM EDT for Marion County, Florida. It was in force for 47 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
Jul 12, 2021, 3:13 PM EDT (19:13 UTC)
Expired
Jul 12, 2021, 4:00 PM EDT
In force
47 min
Issued by
NWS Jacksonville, FL

County Marion County, FL

The radar

The Tampa radar (KTBW), 150 km from the middle of the area, began a volume at 19:15 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

Tampa Bay, FL (KTBW), launched 12:00Z, 7.2 hours before the alert went out and 150 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, Tampa Bay, FL at 12:00Z on 2021-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1557 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, Tampa Bay, FL at 12:00Z on 2021-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 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
1557 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
960 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
-26 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 Jul 12, 2:03 PM EDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jul 12, 2:03 PM EDT, 1 hour 10 minutes before
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In the hours before

Special weather statement, Jul 12, 1:45 PM EDT, 1 hour 28 minutes before
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Special weather statement, Jul 12, 2:33 PM EDT, 40 minutes before
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Special weather statement, Jul 12, 2:47 PM EDT, 26 minutes before
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Local storm report, Jul 12, 3:03 PM EDT, 10 minutes before
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Local storm report, Jul 12, 3:11 PM EDT, 2 minutes before
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Special weather statement, Jul 12, 3:13 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
Jul 12, 9:45 AM EDTRiver Flood WarningJAXGilchrist, Suwannee49 hr
Jul 12, 12:13 PM EDTSpecial Weather StatementJAXFlagler32 min
Jul 12, 12:43 PM EDTSpecial Weather StatementJAXFlagler47 min
Jul 12, 12:50 PM EDTSpecial Weather StatementJAXSaint Johns40 min
Jul 12, 1:08 PM EDTSevere Thunderstorm WarningJAXFlagler, Marion, Putnam37 min
Jul 12, 1:26 PM EDTSpecial Weather StatementJAXSaint Johns34 min
Jul 12, 1:42 PM EDTSpecial Weather StatementJAXMarion48 min
Jul 12, 1:45 PM EDTSpecial Weather StatementJAXSuwannee30 min
Jul 12, 2:33 PM EDTSpecial Weather StatementJAXMarion42 min
Jul 12, 2:47 PM EDTSpecial Weather StatementJAXDuval28 min
Jul 12, 3:14 PM EDTSpecial Weather StatementJAXNassau46 min
Jul 12, 6:01 PM EDTSpecial Weather StatementJAXSuwannee29 min
Jul 12, 6:31 PM EDTSpecial Weather StatementJAXSuwannee44 min
Jul 12, 7:15 PM EDTSpecial Weather StatementJAXHamilton45 min
Jul 12, 4:50 PM EDTSpecial Weather StatementJAXLanier25 min
Jul 12, 7:30 PM EDTSpecial Weather StatementJAXClinch45 min
Jul 12, 7:42 PM EDTSpecial Weather StatementJAXBacon48 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.