A warm front lifted an stalled near the Interstate 10 corridor. A mid level short wave trough moved along the front bringing waves of showers and isolated thunderstorms, as well as localized heavy rainfall.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS JAX wrote it up.
A warm front lifted an stalled near the Interstate 10 corridor. A mid level short wave trough moved along the front bringing waves of showers and isolated thunderstorms, as well as localized heavy rainfall.
The local office's own words before the first event, 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 the first event at Apr 9, 1:58 PM EST, 3 hours 35 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 258 PM EDT Mon Apr 9 2018 ...Locally heavy rainfall across North Florida through Tuesday Night... .NEAR TERM /through Tuesday/... Band of showers/isolated thunder continues along and just N of east-west warm frontal boundary that is forecast to remain over north-central FL through Tonight. Latest guidance suggests one wave of showers/isolated thunder moves across nctrl FL into ne FL late afternoon into early evening. Another wave of heavier showers/isolated thunder is forecast to affect nctrl FL later Tonight, with scattered showers further north due to weak isentropic lift north of the warm front. Some increase in coverage seen toward 12z particularly I-10 northward and hourly POPs increase accordingly. Temps won't drop very much in warm advection pattern. Latest consensus guidance similar to our current low temp forecast, with mid 50s across se GA, 55-10 I-10 corridor...lwr 60s further S and coast except perhaps mid 60s southernmost counties. A cloudy wet day is forecast for Tuesday. Rainfall expected to be most widespread, and heaviest, SE of GNV-JAX line. Could see areas with 2-3 inches of rain there thru Tuesday. Isolated to scattered t-storms anticipated especially S of I-10 corridor. Latest consensus guidance has high temps only lwr-mid 60s se GA, mid 60s I-10 corridor, 65-70 GNV-SGJ, and 70-75 further south. .SHORT TERM /Tuesday Night through Thursday/... Tuesday Night...Low develops on front East of JAX over the Atlc Coastal Waters and pulls trailing frontal boundary slowly southward through the FL peninsula and offshore. This will still allow for locally heavy rainfall and embedded storms across NE FL during the evening hours, then rainfall slowly ending after midnight with clearing skies from the NW across SE GA after midnight and NE FL towards morning. Cooler temps will filter in by Wed Morning with mid/upper 40s across SE GA/Suwannee Valley and lower to middle 50s along the coast and the rest of NE FL. Wed-Thu...High pressure builds north of the region on Wednesday then pushes offshore on Thursday. Mostly Clear with slightly cooler than normal temps are expected in the NE flow on Wednesday with highs in the 70s inland and upper 60s at the coast, then near normal temps on Thursday in the SE Flow as highs near 80 degrees inland and lower/middle 70s at the coast. Cool overnight lows in the upper 40s/lower 50s inland Wed Night and mid/upper 50s at the coast. .LONG TERM /Friday through Monday/... Long-range models in good agreement for next frontal passage to impact the area on Sunday with showers/isolated storms, while above normal temps are expected ahead of this on Fri/Sat as mild southerly flow pushes Max Temps into the lower/middle 80s. Cooler and drier airmass expected on Monday following the frontal passage with below normal highs in the 60s/lower 70s. Winds will be breezy out of the S-SW at 15-25mph on Sat/Sun, then breezy W-NW flow on Monday. && .AVIATION...CIGS have increased into MVFR range early this afternoon. Have maintained this in TAFs thru the afternoon...then showing decrease to IFR range Tonight as showers and isolated TSRA increase across the area. Best chance of TSRA appears to be KGNV/KSGJ, and included TSRA for those sites. Expecting IFR to low-end MVFR conditions through much of the day Tuesday with occasional showers. && .MARINE...A warm front will stall across the Fl waters this afternoon and Tonight. Winds will be generally NE across the GA waters and light and variable FL waters. A wave of low pressure will move along front over the waters Tuesday, bringing widespread showers and thunderstorms. Northerly winds will increase behind the low. Winds could approach advisory criteria particularly over the offshore component Tuesday afternoon thru Wednesday. Conditions will improve Thursday and Friday as high pressure builds over the waters. Rip Currents: Low risk this afternoon due to lighter winds. Moderate risk expected Tuesday as onshore flow and swells increase. && .PRELIMINARY POINT TEMPS/POPS... AMG 54 63 46 75 / 60 60 0 0 SSI 55 62 52 69 / 60 70 20 0 JAX 59 65 51 73 / 70 70 40 0 SGJ 62 68 54 71 / 70 80 70 0 GNV 62 70 51 77 / 80 80 50 0 OCF 65 74 53 78 / 80 80 60 0 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. && Wolf/Hess
Special Weather Statement
National Weather Service Jacksonville FL
244 PM EDT MON APR 9 2018
FLZ038-091930-
Flagler FL-
244 PM EDT MON APR 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN FLAGLER COUNTY UNTIL
330 PM EDT...
At 244 PM EDT, Doppler radar was tracking a strong thunderstorm over
Pierson, moving east at 35 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.
This storm will remain over mainly rural areas of southeastern
Flagler County.
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 2942 8114 2941 8115 2926 8115 2926 8133
2927 8142 2938 8142 2945 8111 2943 8110
TIME...MOT...LOC 1844Z 258DEG 29KT 2926 8144
NELSONSpecial Weather Statement
National Weather Service Jacksonville FL
543 PM EDT MON APR 9 2018
FLZ037-092215-
Putnam FL-
543 PM EDT MON APR 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PUTNAM COUNTY UNTIL 615
PM EDT...
At 543 PM EDT, Doppler radar was tracking a strong thunderstorm near
Hollister, or near Interlachen, moving east at 25 mph.
Wind gusts of 45 to 55 mph can be expected along with possible minor
wind damage.
Locations impacted include...
Palatka, Crescent City, Interlachen, Pomona Park, East Palatka,
Orange Mills, Hollister, San Mateo, Satsuma and Welaka.
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 2940 8149 2950 8184 2952 8185 2951 8188
2954 8197 2973 8185 2968 8153 2962 8152
2949 8152 2947 8150
TIME...MOT...LOC 2143Z 281DEG 23KT 2957 8181
NELSONSpecial Weather Statement National Weather Service Jacksonville FL 612 PM EDT MON APR 9 2018 FLZ031-032-036-037-040-092300- Putnam FL-Alachua FL-Bradford FL-Marion FL-Clay FL- 612 PM EDT MON APR 9 2018 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ALACHUA... SOUTHEASTERN BRADFORD...NORTHEASTERN MARION...WESTERN PUTNAM AND SOUTHWESTERN CLAY COUNTIES UNTIL 700 PM EDT... At 612 PM EDT, Doppler radar was tracking a strong thunderstorm near Newnans Lake, or 8 miles southwest of Melrose, moving east at 25 mph. Wind gusts of 40 to 45 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... Palatka, Interlachen, Melrose, Hawthorne, Lake Geneva, Rochelle, Melrose Landing, Cross Creek, Orange Springs and Orange Heights. 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 2956 8239 2981 8212 2964 8163 2935 8184 TIME...MOT...LOC 2212Z 285DEG 21KT 2966 8217 HESS
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
At 6:33 pm, water was pushing up manhole covers on the street behind city hall due to heavy rainfall. At 6:35 pm, county dispatch reported flooding on SW 12th Street and 2nd Avenue estimated about 12 inches deep on the road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2018Every state in 2018This day in weather historyWarnings in Florida, April 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 749648.