Alert archive / Florida / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 222, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Oct 9, 2018, 10:15 AM EDT for Duval County, Nassau County, Florida. It was in force for 16 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
- Oct 9, 2018, 10:15 AM EDT (14:15 UTC)
- Expired
- Oct 9, 2018, 10:31 AM EDT
- In force
- 16 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Duval County, FL, Nassau County, FL
The radar
The Jacksonville radar (KJAX), 1 km from the middle of the area, began a volume at 14:15 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 2.3 hours before the alert went out and 248 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
- 270 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 573 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 Oct 9, 9:12 AM EDT, 1 hour 3 minutes earlier.
Area forecast discussion, Oct 9, 9:12 AM EDT, 1 hour 3 minutes before
Area Forecast Discussion
National Weather Service Jacksonville FL
912 AM EDT Tue Oct 9 2018
.UPDATE...
Gusty showers will continue to move West off the Atlantic this
morning. Strong wind gusts will be possible with the heavier
showers, especially near the coast. The chance for thunderstorms
will increase into the afternoon, due to diurnal instability, with
these having the potential to produce strong wind gusts as well.
Temperatures will moderate into the middle 80s.
&&
.AVIATION.../12z TAF period/...
Gusty showers and storms are expected this afternoon and evening.
This potential is expected to be lower Tonight, but the potential
for a gusty shower can not be ruled out through the night.
&&
.PRELIMINARY POINT TEMPS/POPS...
AMG 85 75 88 76 / 70 40 80 80
SSI 82 77 86 78 / 70 60 70 80
JAX 85 77 89 77 / 60 30 70 60
SGJ 84 80 89 78 / 70 30 60 40
GNV 87 77 88 77 / 40 30 70 60
OCF 88 77 89 77 / 30 30 70 60
&&
.JAX WATCHES/WARNINGS/ADVISORIES...
FL...Tropical Storm Watch for Columbia-Gilchrist-Hamilton-Suwannee.
High Rip Current Risk through late Wednesday night for Coastal
Duval-Coastal Flagler-Coastal Nassau-Coastal St. Johns.
High Surf Advisory until 10 AM EDT Thursday for Coastal Duval-
Coastal Flagler-Coastal Nassau-Coastal St. Johns.
Coastal Flood Advisory until 6 AM EDT Thursday for Clay-Coastal
Duval-Coastal Flagler-Coastal Nassau-Coastal St. Johns-
Inland Duval-Inland St. Johns.
GA...Tropical Storm Watch for Appling-Atkinson-Bacon-Brantley-
Charlton-Clinch-Coastal Camden-Coastal Glynn-Coffee-Echols-
Inland Camden-Inland Glynn-Jeff Davis-Pierce-Ware-Wayne.
High Rip Current Risk through late Wednesday night for Coastal
Camden-Coastal Glynn.
High Surf Advisory until 10 AM EDT Thursday for Coastal Camden-
Coastal Glynn.
Coastal Flood Advisory until 6 AM EDT Thursday for Coastal
Camden-Coastal Glynn.
AM...Tropical Storm Watch for Coastal waters from Altamaha Sound to
Fernandina Beach FL out 20 NM-Waters from Altamaha Sound GA
to Fernandina Beach FL from 20 to 60 NM.
Small Craft Advisory until 3 PM EDT Thursday for 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 Fernandina Beach to St. Augustine FL from 20 to
60 NM-Waters from St. Augustine to Flagler Beach FL from 20
to 60 NM.
&&
23//In the hours before
Local storm report, Oct 9, 9:09 AM EDT, 1 hour 6 minutes before
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</html>Special weather statement, Oct 9, 9:34 AM EDT, 41 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
934 AM EDT TUE OCT 9 2018
FLZ033-038-124-125-133-138-091430-
Coastal Flagler FL-Coastal St. Johns FL-Inland Flagler FL-
Coastal Duval FL-Coastal Nassau FL-Inland St. Johns FL-
934 AM EDT TUE OCT 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR FLAGLER...NORTHEASTERN NASSAU...
ST. JOHNS AND EASTERN DUVAL COUNTIES UNTIL 1030 AM EDT...
At 934 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles northeast of Barberville to 18 miles
east of Little Talbot Island. Movement was west at 30 mph.
Wind gusts of 40 to 50 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Jacksonville, Palm Coast, St. Marys, Saint Augustine, Fernandina
Beach, Flagler Beach, Bunnell, Hastings, Unf and Fruit Cove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 2926 8115 2926 8141 2940 8142 2940 8148
2949 8152 2976 8153 2997 8161 3004 8169
3012 8168 3011 8151 3032 8168 3052 8163
3075 8168 3072 8161 3075 8158 3075 8154
3073 8142 3025 8135 2952 8110
TIME...MOT...LOC 1334Z 098DEG 26KT 2927 8134 3048 8111
ENYEDILocal storm report, Oct 9, 9:37 AM EDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
937 AM EDT TUE OCT 9 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0920 AM TSTM WND GST VILANO BEACH 29.94N 81.30W
10/09/2018 M43 MPH ST. JOHNS FL MESONET
MESONET SITE AT VILANO BEACH MEASURED 36 MPH WINDS WITH
GUST TO 43 MPH
&&
AENYEDISpecial weather statement, Oct 9, 10:10 AM EDT, 5 minutes before
Special Weather Statement National Weather Service Jacksonville FL 1010 AM EDT TUE OCT 9 2018 FLZ024-025-124-125-091500- Inland Duval FL-Inland Nassau FL-Coastal Duval FL-Coastal Nassau FL- 1010 AM EDT TUE OCT 9 2018 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL NASSAU AND CENTRAL DUVAL COUNTIES UNTIL 1100 AM EDT... At 1009 AM EDT, a strong band of showers extended along a line extending from 6 miles northwest of Little Talbot Island to near Nas Jax. Movement was northwest at 25 mph. Wind gusts of 45 to 55 mph can be expected along with possible minor wind damage. A wind gust of 51 mph was reported at 10 am at Huguenot Park. Locations impacted include... Jacksonville, Callahan, Jacksonville International Arpt, Arlington, Yulee, Cisco Gardens, Ortega, Fort Caroline, Bryceville and Nassau Village-Ratliff. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with these storms, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3075 8177 3033 8200 3021 8159 3053 8141 TIME...MOT...LOC 1409Z 127DEG 23KT 3053 8149 3025 8164 ENYEDI
Local storm report, Oct 9, 10:11 AM EDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
1011 AM EDT TUE OCT 9 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1000 AM TSTM WND GST 2 N MAYPORT 30.42N 81.41W
10/09/2018 M51 MPH AMZ452 FL MESONET
WEATHERFLOW SITE MEASURED A PEAK WIND GUST OF 51 MPH.
&&
RBRICKERLocal storm report, Oct 9, 10:15 AM EDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
National Weather Service Jacksonville FL
1015 AM EDT TUE OCT 9 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0920 AM TSTM WND GST 2 NW ST. AUGUSTINE 29.92N 81.33W
10/09/2018 M43 MPH St. Johns FL MESONET
WEATHERFLOW SITE MEASURED A PEAK WIND GUST OF 43 MPH.
&&
RBRICKERThe office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 9, 3:07 AM EDT | High Surf Advisory | JAX | Duval, Flagler, Nassau | 49 hr |
| Oct 9, 4:45 AM EDT | Special Marine Warning | JAX | 90 min | |
| Oct 9, 6:55 AM EDT | Special Marine Warning | JAX | 65 min | |
| Oct 9, 6:58 AM EDT | Special Weather Statement | JAX | Saint Johns | 32 min |
| Oct 9, 7:27 AM EDT | Special Marine Warning | JAX | 2 hr | |
| Oct 9, 7:36 AM EDT | Special Weather Statement | JAX | Flagler | 24 min |
| Oct 9, 8:59 AM EDT | Special Weather Statement | JAX | Duval | 31 min |
| Oct 9, 9:02 AM EDT | Special Weather Statement | JAX | Saint Johns | 28 min |
| Oct 9, 9:29 AM EDT | Special Marine Warning | JAX | 4 hr | |
| Oct 9, 9:34 AM EDT | Special Weather Statement | JAX | Duval, Flagler, Saint Johns | 56 min |
| Oct 9, 9:49 AM EDT | Tornado Warning | JAX | Duval, Saint Johns | 8 min |
| Oct 9, 10:10 AM EDT | Special Weather Statement | JAX | Duval, Nassau | 50 min |
| Oct 9, 10:30 AM EDT | Special Weather Statement | JAX | Duval, Flagler, Nassau, Saint Johns | 90 min |
| Oct 9, 11:18 AM EDT | Tropical Storm Warning | JAX | Gilchrist, Suwannee | 42 hr |
| Oct 9, 12:40 PM EDT | Special Weather Statement | JAX | Flagler | 50 min |
| Oct 9, 1:05 PM EDT | Special Weather Statement | JAX | Duval, Nassau | 85 min |
| Oct 9, 1:18 PM EDT | Special Marine Warning | JAX | 4 hr | |
| Oct 9, 5:13 PM EDT | Special Weather Statement | JAX | Marion | 47 min |
| Oct 9, 11:43 AM EDT | Coastal Flood Warning | JAX | Camden, Glynn | 28 hr |
| Oct 9, 12:07 PM EDT | Special Weather Statement | JAX | Camden, Glynn | 53 min |
| Oct 9, 2:57 PM EDT | Special Weather Statement | JAX | Brantley, Camden, Charlton | 48 min |
| Oct 9, 3:43 PM EDT | Special Weather Statement | JAX | Brantley, Pierce | 47 min |
| Oct 9, 4:59 PM EDT | Areal Flood Advisory | JAX | Brantley, Camden, Glynn, Pierce, Wayne | 2 hr |
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.