Alert archive / Florida / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 161, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 6, 2017, 2:00 PM EDT for Saint Johns County, Florida. It was in force for 30 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 6, 2017, 2:00 PM EDT (18:00 UTC)
- Expired
- Jun 6, 2017, 2:30 PM EDT
- In force
- 30 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Saint Johns County, FL
The radar
The Jacksonville radar (KJAX), 70 km from the middle of the area, began a volume at 17:59 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, 6.0 hours before the alert went out and 71 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
- 398 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -49 m²/s²
- 0-3 km storm-relative helicity
- -63 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 6, 10:38 AM EDT, 3 hours 22 minutes earlier.
Area forecast discussion, Jun 6, 10:38 AM EDT, 3 hours 22 minutes before
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</html>Hazardous weather outlook, Jun 6, 10:43 AM EDT, 3 hours 17 minutes before
Hazardous Weather Outlook National Weather Service Jacksonville FL 1043 AM EDT Tue Jun 6 2017 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125- GAZ132>136-149>154-162>166-071445- 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- 1043 AM EDT Tue Jun 6 2017 ...FLOOD WATCH IN EFFECT FOR THE SUWANNEE VALLEY AREA AND MARION COUNTY... ...PERIODS OF HEAVY RAINFALL EXPECTED THROUGH EARLY THURSDAY... ...A FEW STRONG TO ISOLATED SEVERE THUNDERSTORMS POSSIBLE THROUGH WEDNESDAY EVENING... This Hazardous Weather Outlook is for Northeast Florida, Southeast Georgia and the Adjacent Coastal Waters. .DAY ONE...Today and Tonight... Waves of heavy rainfall accompanied by embedded strong thunderstorms are expected through late tonight. Widespread heavy downpours and a few strong thunderstorms will push northeastward from the Gulf of Mexico across our region from the mid-morning through mid- afternoon hours today. The heaviest rainfall amounts with this activity will likely occur in the Suwannee Valley and portions of inland southeast Georgia, where widespread rainfall amounts of 1 to 3 inches are forecast, with localized heavier amounts possible. Stronger thunderstorms during this time frame will be capable of producing gusty winds of 30-40 mph, frequent cloud to ground lightning strikes, and localized flooding, particularly in urban areas. Another round of heavy downpours and embedded strong to possibly isolated severe thunderstorms is expected to push into our region from the west, mainly after midnight tonight. The Storm Prediction Center has placed southern portions of southeast Georgia and all of northeast and north central Florida within a marginal risk for severe thunderstorm development, with stronger activity overnight capable of producing damaging wind gusts, frequent cloud to ground lightning strikes, and localized flooding. .DAYS TWO THROUGH SEVEN...Wednesday through Monday... A cold front will approach our area from the north and will slowly push through our region on Wednesday night and Thursday. Additional rounds of heavy downpours and embedded strong thunderstorms are expected on Wednesday and Wednesday night, bringing event rainfall totals to the 2 to 4 inch range, with locally higher amounts possible. Stronger thunderstorms will be capable of producing gusty winds, frequent cloud to ground lightning strikes, and localized flooding. Activity will gradually push south of our area by the early afternoon hours on Thursday. Southwesterly winds will strengthen over the coastal waters on Wednesday evening in advance of a cold front. A Small Craft Advisory may be required for the offshore Florida coastal waters on Wednesday night. A northeasterly wind surge following the cold front may also bring Small Craft Advisory conditions to portions of our coastal waters on Thursday. An elevated risk of rip currents is expected at area beaches from Thursday through Saturday due to onshore winds. Isolated to widely scattered mainly afternoon and evening thunderstorms are expected on Friday and Saturday, with scattered to numerous thunderstorms possible by Sunday and Monday afternoons. .SPOTTER INFORMATION STATEMENT... Spotters are asked to self activate if warnings are issued. We encourage spotters to report rainfall amounts in excess of 2 inches. For additional information, visit the National Weather Service in Jacksonville website on the internet at weather.gov/jax.
In the hours before
Local storm report, Jun 6, 9:36 AM EDT, 4 hours 24 minutes before
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</html>Local storm report, Jun 6, 12:04 PM EDT, 1 hour 56 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 |
|---|---|---|---|---|
| Jun 6, 10:32 AM EDT | Flood Watch | JAX | Baker, Bradford, Duval, Flagler, Gilchrist, Nassau and 2 more | 34 hr |
| Jun 6, 12:25 PM EDT | Areal Flood Advisory | JAX | Alachua, Gilchrist | 3 hr |
| Jun 6, 12:32 PM EDT | Areal Flood Advisory | JAX | Suwannee | 118 min |
| Jun 6, 1:22 PM EDT | Areal Flood Advisory | JAX | Alachua, Marion | 113 min |
| Jun 6, 1:32 PM EDT | Special Weather Statement | JAX | Saint Johns | 43 min |
| Jun 6, 2:06 PM EDT | Tornado Warning | JAX | Saint Johns | 24 min |
| Jun 6, 2:09 PM EDT | Special Marine Warning | JAX | 66 min | |
| Jun 6, 2:14 PM EDT | Areal Flood Advisory | JAX | Saint Johns | 2 hr |
| Jun 6, 2:58 PM EDT | Areal Flood Advisory | JAX | Putnam | 2 hr |
| Jun 6, 3:29 PM EDT | Areal Flood Advisory | JAX | Alachua, Gilchrist | 3 hr |
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.