Alert archive / Florida / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 115, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at May 13, 2017, 4:43 PM EDT for Duval County, Saint Johns County, Florida. It was in force for 35 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
- May 13, 2017, 4:43 PM EDT (20:43 UTC)
- Expired
- May 13, 2017, 5:18 PM EDT
- In force
- 35 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Duval County, FL, Saint Johns County, FL
The radar
The Jacksonville radar (KJAX), 43 km from the middle of the area, began a volume at 20:43 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, 8.7 hours before the alert went out and 45 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
- 937 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 781 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.2
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 May 13, 2:16 PM EDT, 2 hours 27 minutes earlier.
Area forecast discussion, May 13, 2:16 PM EDT, 2 hours 27 minutes before
Area Forecast Discussion National Weather Service Jacksonville FL 216 PM EDT Sat May 13 2017 .NEAR TERM.../THROUGH SUNDAY/... An area of low pressure will track East across the region this afternoon, with showers and storms expected. A cold front will move Southeast into SE GA this evening, then slowly move across NE FL overnight into Sunday morning. A few coastal showers and storms will be possible in the morning hours Sunday as the front passes. Clouds will decrease Sunday afternoon following the front. Temperatures will trend below normal for Sunday. && .SHORT TERM.../SUNDAY NIGHT THROUGH TUESDAY/... High pressure will build from the Northwest then North into Monday, with mainly clear skies. High pressure will then build to the East into Tuesday. Temperatures will trend above normal this period. && .LONG TERM.../TUESDAY NIGHT THROUGH SATURDAY/... High pressure will be East of the region this period, with a prolonged period of dry weather expected. Could be enough moisture return by Saturday, to initiate afternoon convection on sea breeze. Temperatures will be above normal this period. && .MARINE... A COLD FRONT WILL SLIDE SOUTHEAST ACROSS AREA WATERS TONIGHT INTO SUNDAY MORNING. HIGH PRESSURE WILL BUILD TO THE NORTHWEST AND NORTH INTO EARLY NEXT WEEK...THEN TO THE EAST THROUGH MID WEEK. && .AVIATION... Scattered to numerous showers and storms are expected this afternoon into evening, with restrictions expected. VFR conditions will then be expected for much of the overnight. There is a chance for a few showers and storms near the coast Sunday morning, which could cause brief restrictions. && .PRELIMINARY POINT TEMPS/POPS... AMG 64 84 60 91 / 50 0 0 0 SSI 68 81 68 83 / 30 20 0 0 JAX 66 82 65 88 / 30 20 0 0 SGJ 68 82 68 83 / 50 20 10 10 GNV 64 86 63 91 / 30 10 0 0 OCF 65 88 64 91 / 50 10 0 0 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. && Struble
Hazardous weather outlook, May 13, 2:25 PM EDT, 2 hours 18 minutes before
Hazardous Weather Outlook National Weather Service Jacksonville FL 225 PM EDT Sat May 13 2017 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125- GAZ132>136-149>154-162>166-141830- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Inland Duval-Union- Bradford-Clay-St. Johns-Gilchrist-Alachua-Putnam-Flagler-Marion- Coastal Nassau-Coastal Duval-Coffee-Jeff Davis-Bacon-Appling- Wayne-Atkinson-Ware-Pierce-Brantley-Inland Glynn-Coastal Glynn- Echols-Clinch-Charlton-Inland Camden-Coastal Camden- 225 PM EDT Sat May 13 2017 ...MARGINAL RISK FOR SEVERE WEATHER THROUGH THIS EVENING... ...ELEVATED FIRE DANGER TODAY... This Hazardous Weather Outlook is for Northeast Florida, Southeast Georgia and the Adjacent Coastal Waters. .DAY ONE...This Afternoon and Tonight... THERE IS A MARGINAL RISK FOR SEVERE WEATHER...WITH STRONG WINDS BEING THE MAIN HAZARD. ELEVATED FIRE DANGER TODAY. REDUCED VISIBILITIES EXPECTED TONIGHT NEAR AREA WILDFIRES. .DAYS TWO THROUGH SEVEN...Sunday through Friday... REDUCED VISIBILITIES EXPECTED NEAR AREA WILDFIRES EACH NIGHT. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. For additional information, visit the National Weather Service in Jacksonville website on the internet at weather.gov/jax.
In the hours before
Special weather statement, May 13, 3:31 PM EDT, 1 hour 12 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
331 PM EDT SAT MAY 13 2017
FLZ031-032-036-037-132015-
Putnam FL-Alachua FL-Bradford FL-Clay FL-
331 PM EDT SAT MAY 13 2017
...SIGNIFICANT WEATHER ADVISORY FOR ALACHUA...SOUTHEASTERN
BRADFORD...NORTHWESTERN PUTNAM AND SOUTHWESTERN CLAY COUNTIES UNTIL
415 PM EDT...
At 331 PM EDT, Doppler radar was tracking a strong thunderstorm over
East Bronson, or near Bronson, moving northeast at 35 mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Gainesville, Starke, Interlachen, Keystone Heights, Melrose,
Hawthorne, Archer, University Of Florida, Florahome and Melrose
Landing.
LAT...LON 2946 8222 2946 8220 2949 8222 2948 8255
2954 8256 2954 8265 2955 8265 2999 8208
2956 8171 2946 8219 2945 8221
TIME...MOT...LOC 1931Z 231DEG 32KT 2949 8257
HESSSpecial weather statement, May 13, 3:35 PM EDT, 1 hour 8 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
335 PM EDT SAT MAY 13 2017
GAZ164-132000-
Charlton GA-
335 PM EDT SAT MAY 13 2017
...SIGNIFICANT WEATHER ADVISORY FOR CHARLTON COUNTY UNTIL 400 PM
EDT...
At 335 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles west of Homeland, or 9 miles east of Stephen Foster State Park,
moving east at 50 mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Folkston, Stephen Foster State Park, Homeland, Race Pond and Winokur.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3092 8192 3090 8190 3081 8191 3082 8194
3083 8194 3083 8195 3082 8196 3080 8196
3079 8197 3080 8242 3101 8241 3101 8208
3108 8206 3104 8191 3100 8191 3098 8192
3095 8189
TIME...MOT...LOC 1935Z 252DEG 42KT 3086 8218
SHULERSpecial weather statement, May 13, 4:02 PM EDT, 41 minutes before
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</html>The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 9:50 PM EDT | Special Weather Statement | JAX | Suwannee | 40 min |
| May 13, 12:02 PM EDT | Special Marine Warning | JAX | 58 min | |
| May 13, 2:06 PM EDT | Special Weather Statement | JAX | Hamilton | 39 min |
| May 13, 2:42 PM EDT | Special Weather Statement | JAX | Baker, Columbia, Hamilton | 48 min |
| May 13, 3:00 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia | 45 min |
| May 13, 3:19 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Duval, Nassau | 41 min |
| May 13, 3:31 PM EDT | Special Weather Statement | JAX | Alachua | 44 min |
| May 13, 3:40 PM EDT | Special Marine Warning | JAX | 2 hr | |
| May 13, 3:47 PM EDT | Severe Thunderstorm Warning | JAX | Duval, Nassau | 58 min |
| May 13, 4:00 PM EDT | Severe Thunderstorm Warning | JAX | Nassau | 45 min |
| May 13, 4:02 PM EDT | Special Weather Statement | JAX | Baker | 28 min |
| May 13, 4:25 PM EDT | Special Weather Statement | JAX | Baker, Duval | 50 min |
| May 13, 4:38 PM EDT | Special Weather Statement | JAX | Duval | 52 min |
| May 13, 5:59 PM EDT | Special Weather Statement | JAX | Hamilton | 61 min |
| May 13, 7:06 PM EDT | Special Weather Statement | JAX | Hamilton | 54 min |
| May 13, 7:47 PM EDT | Tornado Warning | JAX | Baker | 28 min |
| May 13, 6:31 AM EDT | Special Weather Statement | JAX | Ware | 29 min |
| May 13, 12:15 PM EDT | Special Weather Statement | JAX | Brantley, Camden, Glynn | 60 min |
| May 13, 12:25 PM EDT | Special Weather Statement | JAX | Appling, Jeff Davis | 65 min |
| May 13, 12:59 PM EDT | Special Weather Statement | JAX | Glynn | 46 min |
| May 13, 1:14 PM EDT | Special Weather Statement | JAX | Appling, Bacon, Coffee, Jeff Davis | 46 min |
| May 13, 1:54 PM EDT | Special Weather Statement | JAX | Atkinson, Bacon, Clinch, Echols, Ware | 51 min |
| May 13, 2:38 PM EDT | Special Weather Statement | JAX | Clinch, Ware | 52 min |
| May 13, 3:22 PM EDT | Special Weather Statement | JAX | Brantley, Pierce | 38 min |
| May 13, 3:35 PM EDT | Special Weather Statement | JAX | Charlton | 25 min |
| May 13, 4:05 PM EDT | Special Weather Statement | JAX | Glynn | 25 min |
| May 13, 7:03 PM EDT | Special Weather Statement | JAX | Clinch | 57 min |
| May 13, 7:32 PM EDT | Severe Thunderstorm Warning | JAX | Charlton, Ware | 58 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2017Every severe thunderstorm warning in 2017
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.