Alert archive / Florida / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 100, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 20, 2018, 4:10 PM EDT for Baker County, Columbia County, Union County, Florida. It was in force for 50 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 20, 2018, 4:10 PM EDT (20:10 UTC)
- Expired
- Jun 20, 2018, 5:00 PM EDT
- In force
- 50 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Baker County, FL, Columbia County, FL, Union County, FL
The radar
The Jacksonville radar (KJAX), 76 km from the middle of the area, began a volume at 20:09 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, 8.2 hours before the alert went out and 77 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.
- Mixed-layer CAPE
- 1714 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 20, 8:31 AM EDT, 7 hours 39 minutes earlier.
Area forecast discussion, Jun 20, 8:31 AM EDT, 7 hours 39 minutes before
Area Forecast Discussion National Weather Service Jacksonville FL 831 AM EDT Wed Jun 20 2018 .Near Term.../Today/... The region will be between high pressure to the Southeast and a trough to the North Today. Diurnal instability will lead to convective activity. With a prevailing Southwesterly flow the West coast sea breeze will push convection toward the east central portion of the region this afternoon, where it will meet with the east coast sea breeze. So, the greatest chances for convection will be this afternoon over inland NE FL. Temperatures will moderate into the lower to middle 90s, away from the immediate coast where readings will be a little cooler. && .Aviation.../12z TAF period/... Convection is expected to expand in coverage through the afternoon hours, then dissipate during the evening hours. Restrictions in and near storms will be possible along with gusty winds. && .PRELIMINARY POINT TEMPS/POPS... AMG 95 75 94 75 / 50 20 30 20 SSI 91 78 92 78 / 20 20 30 20 JAX 93 76 94 75 / 40 20 40 30 SGJ 92 75 91 75 / 50 30 40 30 GNV 91 74 91 75 / 60 30 40 20 OCF 91 74 91 75 / 60 30 30 20 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
In the hours before
Special weather statement, Jun 20, 3:33 PM EDT, 37 minutes before
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</html>Special weather statement, Jun 20, 3:39 PM EDT, 31 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
339 PM EDT WED JUN 20 2018
FLZ040-202030-
Marion FL-
339 PM EDT WED JUN 20 2018
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MARION COUNTY UNTIL 430
PM EDT...
At 339 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Ocala Airport, or 8 miles northeast of Rainbow
Lakes Estates, moving southeast at 10 mph.
Excessive cloud-to-ground lightning and wind gusts of 40 to 50 mph
can be expected along with possible minor damage.
Locations impacted include...
Ocala, Rainbow Lakes Estates, Sparr, Anthony, Ocala Airport, Reddick,
McIntosh, Lowell and Romeo.
LAT...LON 2919 8254 2921 8253 2922 8240 2931 8241
2947 8220 2946 8219 2946 8220 2945 8221
2943 8221 2942 8220 2943 8217 2942 8215
2942 8214 2927 8204 2896 8231
TIME...MOT...LOC 1939Z 306DEG 11KT 2922 8234
PETERSONLocal storm report, Jun 20, 3:51 PM EDT, 19 minutes before
PRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
351 PM EDT WED JUN 20 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM TSTM WND DMG 2 NW NORMANDY 30.33N 81.79W
06/20/2018 Duval FL EMERGENCY MNGR
DOWNED TREE ON TOP OF HOME. PERSON TRAPPED INSIDE BUT
OTHERWISE UNHARMED.
&&
WCORLESSLocal storm report, Jun 20, 3:55 PM EDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
355 PM EDT WED JUN 20 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0350 PM LIGHTNING 4 NW NORMANDY 30.35N 81.82W
06/20/2018 Duval FL EMERGENCY MNGR
TRANSFORMER DAMAGED AND SMOKING DUE TO THUNDERSTORM.
&&
WCORLESSSpecial weather statement, Jun 20, 3:58 PM EDT, 12 minutes before
Special Weather Statement National Weather Service Jacksonville FL 358 PM EDT WED JUN 20 2018 FLZ025-125-202045- Inland Duval FL-Coastal Duval FL- 358 PM EDT WED JUN 20 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DUVAL COUNTY UNTIL 445 PM EDT... At 358 PM EDT, Doppler radar was tracking a strong thunderstorm near Oceanway, or 7 miles north of Arlington, moving southeast at 5 mph. Excessive cloud-to-ground lightning and wind gusts of 40 to 50 mph can be expected along with possible minor damage. Locations impacted include... Jacksonville, Arlington, Oceanway, Craig Field, Fort Caroline and Tallyrand. LAT...LON 3041 8170 3053 8157 3039 8140 3024 8158 TIME...MOT...LOC 1958Z 310DEG 5KT 3044 8157 PETERSON
Special weather statement, Jun 20, 4:01 PM EDT, 9 minutes before
Special Weather Statement National Weather Service Jacksonville FL 401 PM EDT WED JUN 20 2018 FLZ022-023-030-031-202045- Columbia FL-Baker FL-Union FL-Bradford FL- 401 PM EDT WED JUN 20 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN BRADFORD...SOUTHWESTERN BAKER...UNION AND EAST CENTRAL COLUMBIA COUNTIES UNTIL 445 PM EDT... At 401 PM EDT, Doppler radar was tracking a strong thunderstorm near Olustee, or 15 miles east of Lake City, moving south at 10 mph. Excessive cloud-to-ground lightning and wind gusts of 40 to 50 mph can be expected along with possible minor damage. Locations impacted include... Lake Butler, Palestine Community, Groves, Lulu, Olustee, Sanderson and Ellerbee. LAT...LON 3032 8261 3042 8226 3014 8210 2995 8248 TIME...MOT...LOC 2001Z 340DEG 11KT 3025 8240 PETERSON
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 2:42 PM EDT | Special Weather Statement | JAX | Clay | 48 min |
| Jun 20, 2:45 PM EDT | Special Weather Statement | JAX | Baker | 45 min |
| Jun 20, 3:30 PM EDT | Special Weather Statement | JAX | Duval | 45 min |
| Jun 20, 3:33 PM EDT | Special Weather Statement | JAX | Bradford, Clay | 42 min |
| Jun 20, 3:39 PM EDT | Special Weather Statement | JAX | Marion | 51 min |
| Jun 20, 3:58 PM EDT | Special Weather Statement | JAX | Duval | 47 min |
| Jun 20, 4:01 PM EDT | Special Weather Statement | JAX | Baker, Union | 44 min |
| Jun 20, 4:44 PM EDT | Special Weather Statement | JAX | Putnam | 46 min |
| Jun 20, 4:47 PM EDT | Special Weather Statement | JAX | Columbia | 43 min |
| Jun 20, 5:17 PM EDT | Severe Thunderstorm Warning | JAX | Nassau | 28 min |
| Jun 20, 6:02 PM EDT | Special Weather Statement | JAX | Flagler | 43 min |
| Jun 20, 6:15 PM EDT | Special Weather Statement | JAX | Hamilton | 45 min |
| Jun 20, 7:08 PM EDT | Special Weather Statement | JAX | Columbia, Hamilton, Suwannee | 52 min |
| Jun 20, 7:26 PM EDT | Severe Thunderstorm Warning | JAX | Suwannee | 49 min |
| Jun 20, 3:21 PM EDT | Special Weather Statement | JAX | Wayne | 39 min |
| Jun 20, 3:22 PM EDT | Special Weather Statement | JAX | Brantley | 38 min |
| Jun 20, 4:29 PM EDT | Special Weather Statement | JAX | Camden | 46 min |
| Jun 20, 4:39 PM EDT | Severe Thunderstorm Warning | JAX | Camden, Glynn | 51 min |
| Jun 20, 5:35 PM EDT | Special Weather Statement | JAX | Wayne | 40 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2018Every 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.