Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 87, NWS Jacksonville, FL

June 7, 2018Marion County, Putnam County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 7, 2018, 6:53 PM EDT for Marion County, Putnam County, Florida. It was in force for 19 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 7, 2018, 6:53 PM EDT (22:53 UTC)
Expired: Jun 7, 2018, 7:12 PM EDT
In force: 19 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Marion County, FL, Putnam County, FL

The radar

The Jacksonville radar (KJAX), 121 km from the middle of the area, began a volume at 22:57 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, 10.9 hours before the alert went out and 172 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: 839 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 7, 3:39 PM EDT, 3 hours 14 minutes earlier.

Area forecast discussion, Jun 7, 3:39 PM EDT, 3 hours 14 minutes before

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In the hours before

Special weather statement, Jun 7, 5:32 PM EDT, 1 hour 21 minutes before

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Special weather statement, Jun 7, 6:06 PM EDT, 47 minutes before

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Special weather statement, Jun 7, 6:32 PM EDT, 21 minutes before

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Special weather statement, Jun 7, 6:49 PM EDT, 4 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 6, 8:58 PM EDT	Areal Flood Advisory	JAX	Marion	92 min
Jun 7, 5:32 PM EDT	Special Weather Statement	JAX	Lake	28 min
Jun 7, 5:51 PM EDT	Severe Thunderstorm Warning	JAX	Marion	24 min
Jun 7, 6:06 PM EDT	Special Weather Statement	JAX	Putnam	24 min
Jun 7, 6:49 PM EDT	Special Weather Statement	JAX	Putnam	26 min
Jun 7, 7:36 PM EDT	Areal Flood Advisory	JAX	Marion, Putnam	114 min
Jun 7, 7:45 PM EDT	Special Weather Statement	JAX	Alachua	45 min
Jun 7, 7:48 PM EDT	Special Weather Statement	JAX	Union	42 min
Jun 7, 5:58 PM EDT	Severe Thunderstorm Warning	JAX	Charlton, Ware	23 min
Jun 7, 6:32 PM EDT	Special Weather Statement	JAX	Charlton	28 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018 Every severe thunderstorm warning in 2018

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.