Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

June 9, 2021Nassau County, Florida

NWS Jacksonville, FL issued this special weather statement at Jun 9, 2021, 6:34 PM EDT for Nassau County, Florida. It was in force for 41 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 9, 2021, 6:34 PM EDT (22:34 UTC)
Expired: Jun 9, 2021, 7:15 PM EDT
In force: 41 min
Issued by: NWS Jacksonville, FL

County Nassau County, FL

The radar

The Jacksonville radar (KJAX), 15 km from the middle of the area, began a volume at 22:36 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, 10.6 hours before the alert went out and 14 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 942 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 23 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 9, 3:02 PM EDT, 3 hours 32 minutes earlier.

Area forecast discussion, Jun 9, 3:02 PM EDT, 3 hours 32 minutes before

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In the hours before

Local storm report, Jun 9, 5:13 PM EDT, 1 hour 21 minutes before

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Special weather statement, Jun 9, 5:17 PM EDT, 1 hour 17 minutes before

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Special weather statement, Jun 9, 5:27 PM EDT, 1 hour 7 minutes before

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Special weather statement, Jun 9, 5:47 PM EDT, 47 minutes before

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Special weather statement, Jun 9, 6:11 PM EDT, 23 minutes before

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Special weather statement, Jun 9, 6:34 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 10:08 PM EDT	Special Weather Statement	JAX	Marion	52 min
Jun 8, 11:38 PM EDT	Special Weather Statement	JAX	Baker	37 min
Jun 9, 2:52 PM EDT	Special Weather Statement	JAX	Suwannee	23 min
Jun 9, 3:07 PM EDT	Special Weather Statement	JAX	Gilchrist	53 min
Jun 9, 3:18 PM EDT	Special Weather Statement	JAX	Suwannee	42 min
Jun 9, 3:46 PM EDT	Special Weather Statement	JAX	Hamilton	44 min
Jun 9, 4:22 PM EDT	Special Weather Statement	JAX	Union	23 min
Jun 9, 4:53 PM EDT	Special Weather Statement	JAX	Baker	52 min
Jun 9, 5:07 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia	23 min
Jun 9, 5:27 PM EDT	Special Weather Statement	JAX	Baker	48 min
Jun 9, 5:47 PM EDT	Special Weather Statement	JAX	Duval	28 min
Jun 9, 6:11 PM EDT	Special Weather Statement	JAX	Suwannee	34 min
Jun 9, 6:42 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	22 min
Jun 9, 7:01 PM EDT	Special Weather Statement	JAX	Suwannee	29 min
Jun 9, 7:20 PM EDT	Severe Thunderstorm Warning	JAX	Suwannee	25 min
Jun 9, 7:37 PM EDT	Special Weather Statement	JAX	Suwannee	38 min
Jun 9, 3:11 PM EDT	Special Weather Statement	JAX	Glynn	49 min
Jun 9, 3:23 PM EDT	Special Weather Statement	JAX	Glynn	52 min
Jun 9, 5:17 PM EDT	Special Weather Statement	JAX	Charlton	28 min
Jun 9, 7:02 PM EDT	Special Weather Statement	JAX	Ware	28 min

Nearby

Special Weather Statements in Florida, 2021 Every 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.