Alert archive / Florida / Special Weather Statements in 2018
Special Weather Statement, NWS Jacksonville, FL
NWS Jacksonville, FL issued this special weather statement at Mar 20, 2018, 12:39 PM EDT for Gilchrist County, Florida. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 20, 2018, 12:39 PM EDT (16:39 UTC)
- Expired
- Mar 20, 2018, 1:30 PM EDT
- In force
- 51 min
- Issued by
- NWS Jacksonville, FL
County Gilchrist County, FL
The radar
The Moody AFB radar (KVAX), 120 km from the middle of the area, began a volume at 16:41 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, 4.7 hours before the alert went out and 136 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
- 1315 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 494 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 257 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 8.3
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Mar 20, 10:43 AM EDT, 1 hour 56 minutes earlier.
Area forecast discussion, Mar 20, 10:43 AM EDT, 1 hour 56 minutes before
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Special weather statement, Mar 20, 10:04 AM EDT, 2 hours 35 minutes before
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</html>Special weather statement, Mar 20, 11:05 AM EDT, 1 hour 34 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
1105 AM EDT TUE MAR 20 2018
FLZ021>023-030-035-201545-
Columbia FL-Baker FL-Union FL-Suwannee FL-Gilchrist FL-
1105 AM EDT TUE MAR 20 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL GILCHRIST...
SOUTHERN BAKER...NORTHWESTERN UNION...SOUTHERN COLUMBIA AND
SOUTHEASTERN SUWANNEE COUNTIES UNTIL 1145 AM EDT...
At 1105 AM EDT, Doppler radar was tracking a strong thunderstorm near
Ichetucknee Spring, moving northeast at 70 mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
damage. Doppler radar has indicated weak rotation within this storm.
Tornadoes may develop with little or no advanced warning.
Locations impacted include...
Lake City, Ichetucknee Spring, Columbia, Macclenny, Glen St. Mary,
Palestine Community, Watertown, Lulu, Olustee and Sanderson.
LAT...LON 3043 8221 3038 8219 3038 8218 3036 8216
3037 8213 3037 8210 3036 8209 3036 8205
3022 8205 2990 8283 3006 8293
TIME...MOT...LOC 1505Z 242DEG 60KT 3003 8280
HESSSpecial weather statement, Mar 20, 12:18 PM EDT, 21 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
1218 PM EDT TUE MAR 20 2018
FLZ022>025-030-GAZ164-201700-
Columbia FL-Inland Duval FL-Baker FL-Union FL-Inland Nassau FL-
Charlton GA-
1218 PM EDT TUE MAR 20 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN NASSAU...SOUTHERN
BAKER...NORTHERN UNION...EAST CENTRAL COLUMBIA...SOUTHWESTERN DUVAL
AND SOUTH CENTRAL CHARLTON COUNTIES UNTIL 100 PM EDT...
At 1218 PM EDT, Doppler radar was tracking a strong thunderstorm over
Olustee, or 11 miles northwest of Lake Butler, moving northeast at 50
mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
damage. Doppler radar has indicated weak rotation within this storm.
Tornadoes may develop with little or no advanced warning.
Locations impacted include...
Macclenny, Glen St. Mary, Palestine Community, Maxville, Lulu,
Olustee, Sanderson, Bryceville, Baldwin and Whitehouse Air Field.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3018 8200 3019 8205 3017 8205 3004 8247
3020 8256 3054 8195 3024 8182
TIME...MOT...LOC 1618Z 244DEG 42KT 3017 8241
HESSSpecial weather statement, Mar 20, 12:32 PM EDT, 7 minutes before
Special Weather Statement National Weather Service Jacksonville FL 1232 PM EDT TUE MAR 20 2018 FLZ031-032-036-201715- Alachua FL-Bradford FL-Clay FL- 1232 PM EDT TUE MAR 20 2018 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ALACHUA...SOUTHERN BRADFORD AND SOUTHWESTERN CLAY COUNTIES UNTIL 115 PM EDT... At 1232 PM EDT, Doppler radar was tracking a strong thunderstorm near Alachua, or 9 miles west of Gainesville, moving northeast at 45 mph. Wind gusts of 45 to 55 mph can be expected along with possible minor damage. Doppler radar has indicated weak rotation within this storm. Tornadoes may develop with little or no advanced warning. Locations impacted include... Gainesville, Starke, Keystone Heights, Alachua, University Of Florida, Camp Blanding, Kingsley, Sampson, Gainesville Airport and Lake Geneva. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 2957 8251 2973 8261 3009 8197 2985 8182 TIME...MOT...LOC 1632Z 241DEG 39KT 2969 8249 HESS
Special weather statement, Mar 20, 12:39 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
1239 PM EDT TUE MAR 20 2018
FLZ021-022-030-035-036-201730-
Columbia FL-Union FL-Suwannee FL-Alachua FL-Gilchrist FL-
1239 PM EDT TUE MAR 20 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN GILCHRIST...NORTHWESTERN
ALACHUA...SOUTHWESTERN UNION...SOUTHERN COLUMBIA AND SOUTHEASTERN
SUWANNEE COUNTIES UNTIL 130 PM EDT...
At 1239 PM EDT, Doppler radar was tracking a strong thunderstorm 10
miles west of Bell, moving northeast at 45 mph.
Nickel size hail and wind gusts of 45 to 55 mph can be expected along
with possible minor damage.
Locations impacted include...
Bell, Worthington Spring, Ichetucknee Spring, High Springs, Fort
White, Worthington Springs, Upland Pines, Providence, La Crosse and
Hildreth.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 2972 8294 2973 8295 2974 8294 2977 8295
2980 8292 2981 8293 2983 8292 2983 8289
2988 8287 2990 8290 2989 8292 2995 8292
3013 8251 2984 8238 2970 8296 2971 8295
2972 8296
TIME...MOT...LOC 1639Z 246DEG 41KT 2979 8303
HESSThe office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 3:21 AM EDT | Wind Advisory | JAX | Baker, Bradford, Duval, Flagler, Gilchrist, Nassau and 2 more | 11 hr |
| Mar 20, 3:28 AM EDT | Gale Warning | JAX | 48 hr | |
| Mar 20, 3:28 AM EDT | Small Craft Advisory | JAX | 33 hr | |
| Mar 20, 10:04 AM EDT | Special Weather Statement | JAX | Flagler | 41 min |
| Mar 20, 11:05 AM EDT | Special Weather Statement | JAX | Baker | 40 min |
| Mar 20, 12:18 PM EDT | Special Weather Statement | JAX | Baker | 42 min |
| Mar 20, 12:32 PM EDT | Special Weather Statement | JAX | Alachua, Bradford | 43 min |
| Mar 20, 12:34 PM EDT | Special Marine Warning | JAX | 56 min | |
| Mar 20, 12:50 PM EDT | Special Marine Warning | JAX | 55 min | |
| Mar 20, 1:11 PM EDT | Special Weather Statement | JAX | Bradford, Clay, Duval | 49 min |
| Mar 20, 1:14 PM EDT | Special Marine Warning | JAX | 91 min | |
| Mar 20, 1:17 PM EDT | Special Weather Statement | JAX | Columbia, Suwannee | 43 min |
| Mar 20, 1:20 PM EDT | Severe Thunderstorm Warning | JAX | Bradford, Clay, Duval, Saint Johns | 40 min |
| Mar 20, 1:26 PM EDT | Severe Thunderstorm Warning | JAX | Marion | 49 min |
| Mar 20, 1:29 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Gilchrist, Marion | 46 min |
| Mar 20, 1:51 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Bradford, Union | 39 min |
| Mar 20, 2:15 PM EDT | Special Weather Statement | JAX | Gilchrist | 45 min |
| Mar 20, 2:17 PM EDT | Special Weather Statement | JAX | Baker, Columbia, Nassau | 43 min |
| Mar 20, 2:19 PM EDT | Special Marine Warning | JAX | 86 min | |
| Mar 20, 2:23 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Baker, Bradford, Columbia, Gilchrist, Suwannee and 1 more | 52 min |
| Mar 20, 2:26 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Nassau | 34 min |
| Mar 20, 2:28 PM EDT | Special Weather Statement | JAX | Marion | 32 min |
| Mar 20, 2:57 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Duval, Nassau | 48 min |
| Mar 20, 3:18 PM EDT | Special Weather Statement | JAX | Bradford, Clay, Union | 42 min |
| Mar 20, 3:32 PM EDT | Special Marine Warning | JAX | 58 min | |
| Mar 20, 3:35 PM EDT | Special Weather Statement | JAX | Marion, Putnam | 40 min |
| Mar 20, 3:38 PM EDT | Special Weather Statement | JAX | Nassau | 22 min |
| Mar 20, 4:11 PM EDT | Special Weather Statement | JAX | Flagler, Marion, Putnam | 64 min |
| Mar 20, 4:35 PM EDT | Special Marine Warning | JAX | 85 min | |
| Mar 20, 4:40 PM EDT | Severe Thunderstorm Warning | JAX | Flagler, Saint Johns | 23 min |
| Mar 20, 5:57 PM EDT | Special Marine Warning | JAX | 63 min | |
| Mar 19, 8:22 PM EDT | Special Weather Statement | JAX | Wayne | 38 min |
| Mar 20, 1:28 PM EDT | Special Weather Statement | JAX | Atkinson | 47 min |
| Mar 20, 1:47 PM EDT | Severe Thunderstorm Warning | JAX | Atkinson, Bacon, Brantley, Coffee, Pierce, Ware | 43 min |
| Mar 20, 2:13 PM EDT | Severe Thunderstorm Warning | JAX | Appling, Bacon, Pierce, Ware, Wayne | 47 min |
| Mar 20, 2:49 PM EDT | Tornado Warning | JAX | Wayne | 26 min |
| Mar 20, 2:59 PM EDT | Special Weather Statement | JAX | Camden | 46 min |
| Mar 20, 3:16 PM EDT | Special Weather Statement | JAX | Wayne | 29 min |
| Mar 20, 3:41 PM EDT | Special Weather Statement | JAX | Glynn | 19 min |
| Mar 20, 4:34 PM EDT | Special Weather Statement | JAX | Wayne | 26 min |
| Mar 20, 5:07 PM EDT | Special Weather Statement | JAX | Brantley | 38 min |
| Mar 20, 5:28 PM EDT | Severe Thunderstorm Warning | JAX | Brantley, Glynn, Wayne | 32 min |
| Mar 20, 5:59 PM EDT | Special Weather Statement | JAX | Glynn | 46 min |
Nearby
Special Weather Statements in Florida, 2018Every special weather statement 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.