Alert archive / Florida / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 71, NWS Jacksonville, FL

June 9, 2019Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 9, 2019, 3:08 PM EDT for Marion County, Florida. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 9, 2019, 3:08 PM EDT (19:08 UTC)
Expired: Jun 9, 2019, 3:34 PM EDT
In force: 26 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Marion County, FL

The radar

The Jacksonville radar (KJAX), 146 km from the middle of the area, began a volume at 19:10 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.1 hours before the alert went out and 173 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: 1333 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 880 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 9, 2:40 PM EDT, 28 minutes earlier.

Area forecast discussion, Jun 9, 2:40 PM EDT, 28 minutes before

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In the hours before

Special weather statement, Jun 9, 12:35 PM EDT, 2 hours 33 minutes before

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Local storm report, Jun 9, 12:49 PM EDT, 2 hours 19 minutes before

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Special weather statement, Jun 9, 12:58 PM EDT, 2 hours 10 minutes before

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Local storm report, Jun 9, 1:13 PM EDT, 1 hour 55 minutes before

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Special weather statement, Jun 9, 2:50 PM EDT, 18 minutes before

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Special weather statement, Jun 9, 3:03 PM EDT, 5 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, 8:05 PM EDT	Special Marine Warning	JAX		55 min
Jun 8, 9:01 PM EDT	Special Marine Warning	JAX		29 min
Jun 8, 9:23 PM EDT	Special Marine Warning	JAX		67 min
Jun 8, 9:47 PM EDT	Special Marine Warning	JAX		43 min
Jun 9, 10:03 AM EDT	Special Weather Statement	JAX	Marion	27 min
Jun 9, 10:56 AM EDT	Special Weather Statement	JAX	Putnam	34 min
Jun 9, 11:26 AM EDT	Special Weather Statement	JAX	Clay	34 min
Jun 9, 11:49 AM EDT	Special Weather Statement	JAX	Saint Johns	26 min
Jun 9, 12:00 PM EDT	Special Weather Statement	JAX	Saint Johns	45 min
Jun 9, 12:11 PM EDT	Special Marine Warning	JAX		64 min
Jun 9, 12:23 PM EDT	Special Weather Statement	JAX	Flagler	37 min
Jun 9, 12:32 PM EDT	Areal Flood Advisory	JAX	Gilchrist, Suwannee	118 min
Jun 9, 12:56 PM EDT	Special Marine Warning	JAX		49 min
Jun 9, 1:07 PM EDT	Special Marine Warning	JAX		83 min
Jun 9, 1:18 PM EDT	Special Marine Warning	JAX		57 min
Jun 9, 2:26 PM EDT	Areal Flood Advisory	JAX	Gilchrist	2 hr
Jun 9, 2:50 PM EDT	Special Weather Statement	JAX	Marion	40 min
Jun 9, 3:03 PM EDT	Special Weather Statement	JAX	Flagler	42 min
Jun 9, 3:59 PM EDT	Special Weather Statement	JAX	Flagler	46 min
Jun 8, 8:08 PM EDT	Special Weather Statement	JAX	Camden	37 min
Jun 8, 8:24 PM EDT	Areal Flood Advisory	JAX	Wayne	96 min
Jun 9, 12:35 PM EDT	Special Weather Statement	JAX	Jeff Davis	25 min
Jun 9, 12:58 PM EDT	Special Weather Statement	JAX	Glynn	32 min

Nearby

Severe Thunderstorm Warnings in Florida, 2019 Every severe thunderstorm warning in 2019

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.