The first week of June brought the onset of the summer 'rainy' season with a dominant west coast sea breeze merging with the east coast sea breeze in the late afternoon near the St. Johns River basin where a pulse severe storm developed over a moist and diurnally unstable airmass.
Every event with a place to put it. Tap one for its entry below.
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.
The first week of June brought the onset of the summer 'rainy' season with a dominant west coast sea breeze merging with the east coast sea breeze in the late afternoon near the St. Johns River basin where a pulse severe storm developed over a moist and diurnally unstable airmass.
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 Jun 3, 12:23 PM EST, 3 hours 22 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 123 PM EDT Thu Jun 3 2021 .AVIATION... [Through 18Z Friday] Scattered showers and embedded storms were developing across the area early this afternoon, and showers/storms will become more widespread through the afternoon hours. Restrictions are expected in/around showers/storms at the TAF sites this afternoon and early evening. Southerly winds around 10 knots will become light and variable overnight. Showers are possible near the TAF sites beginning near daybreak again on Friday. && .PREV DISCUSSION [1020 AM EDT]... .NEAR TERM [Through Tonight]... The area will be between high pressure over the Atlantic waters and a trough digging into the Southeast US causing the steering flow to shift to the south-southwest. Low level south- southeasterly flow will bring showers onshore as they move up the coast in the early morning hours. Southerly flow will increase moisture across the area with PWATs reaching 1.8-2 inches by the afternoon. Ample moisture combined with daytime heating will support scattered to numerous sea breeze driven showers and storms in the afternoon and evening hours. Greatest convective coverage anticipated near the I-95 corridor where the east coast and west coast seabreezes could collide. More moisture and cooler temperatures aloft will result in more instability available for possibly stronger storms. Highs today will mostly be in the mid to upper 80s with lows in the upper 60s to low 70s. .SHORT TERM [Friday Through Saturday]... Fri & Fri night...SW steering flow will continue aloft between the mean layer 1000-700 mb ridge axis across south FL and a lifting eastern CONUS trough. A surface trough will edge southward across GA where stronger upper level dynamics and cooler temps aloft (500 mb -9 to -10 degC) will bring a chance of stronger storms in the afternoon and evening near boundary interactions. Across NE FL, SW steering flow will bring an more dominant west coast sea breeze inland across the Suwannee River Valley through early afternoon, with the sea breeze merger focused west of Highway 301 toward the Atlantic coast Friday afternoon and evening near the St. Johns River basin. Storms across NE FL will have the potential for locally heavy rainfall with very high PWAT (over 2 inches) and weaker storm motion. Drier mid level air across SE GA will bring less coverage of storms, but, could support higher DCAPE and elevated gusty wind and possibly small hail potential with cooler temps aloft and some shear in the hail growth zone. Convection will shift to the ENE into the evening with a gradual decrease in precip coverage and intensity with loss of diurnal instability. Sat & Sat night...Upper ridging across south FL begins to amplify northward as the moist-inverted low level trough axis pivots northward across N FL and over SE GA, increasing PWAT to over 2 inches into Sat afternoon. Light SSW steering flow weakens to < 10 kts with warming temps aloft. With a saturated airmass, the lingering diffuse boundary across south GA and both inland progressing sea breezes, conditions continue favorable for numerous showers and storms to break out during the afternoon and evening, with locally heavy rainfall potential and potentially a few stronger cells with wet downburst potential. A generally drift in deeper convection to the NNE is expected into the early evening, but steering flow will be very light and storm motion likely more erratic and boundary driven. Again, a diurnal fade in precip coverage will develop Sat night as the upper ridge strengthens over the local area and the low level inverted trough axis lifts farther north with a return of SSE steering flow into early Sunday. Temperatures will trend near climo with highs in the upper 80s to near 90 inland to mid 80s coast. Mild, muggy overnight conditions will continue with lows near climo in the mid/upper 60s inland to low 70s St. Johns basin & coast. .LONG TERM [Sunday Through Wednesday]... The mean layer 1000-700 mb ridge axis will transition to north of the local area returning prevailing ESE steering flow and bringing a dominate east coast sea breeze regime. Above normal atmospheric moisture continues into Sunday with higher than normal rain chances, especially for inland areas where sea breezes and boundaries merge. A slight decrease in moisture will continue through mid-week with rain chances trending down gradually toward more climo values. Prevailing onshore flow will bring precip potential to the adjacent Atlantic waters and coastal areas through early evening, with precip coverage expanding inland toward the I-75 into the afternoon and early evening where the higher rain chances will be each day. With upper level ridge holding firm across the local area, severe storm potential will be generally low. Temperatures will trend near to just above normal with highs in the upper 80s to near 90 well inland inland to low/mid 80s coast with lows in the mid/upper 60s to low 70s coast. .MARINE... Surface high pressure anchored over the Atlantic waters northeast of our area, along with another surface ridge building over the Tennessee Valley, will keep south to southeasterly flow around 10 to 15 knots through the period. Chances for showers and thunderstorms expected each day across the coastal waters. Seas will remain below criteria in the 2-5 ft range. Rip Currents: Moderate risk will continue with onshore winds. && .PRELIMINARY POINT TEMPS/POPS... AMG 68 89 69 89 68 / 30 50 50 60 30 SSI 74 87 74 86 73 / 40 40 40 20 20 JAX 70 89 70 87 70 / 50 50 40 50 30 SGJ 70 85 71 85 70 / 50 60 50 40 20 GNV 68 89 68 87 68 / 40 60 30 70 30 OCF 70 90 70 88 70 / 40 60 30 70 30 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
Special Weather Statement
National Weather Service Jacksonville FL
341 PM EDT Thu Jun 3 2021
GAZ162-163-350-032015-
Clinch GA-Echols GA-Southern Ware GA-
341 PM EDT Thu Jun 3 2021
...A strong thunderstorm will impact portions of southeastern Echols,
central Ware and southeastern Clinch Counties through 415 PM EDT...
At 340 PM EDT, Doppler radar was tracking a strong thunderstorm over
Needmore, or near Fargo, moving north at 35 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Fargo and Needmore.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3104 8267 3096 8242 3087 8242 3059 8257
3060 8275 3061 8279
TIME...MOT...LOC 1940Z 199DEG 32KT 3067 8266
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
DDSpecial Weather Statement National Weather Service Jacksonville FL 348 PM EDT Thu Jun 3 2021 FLZ033-133-032030- Coastal St. Johns FL-Inland St. Johns FL- 348 PM EDT Thu Jun 3 2021 ...A strong thunderstorm will impact portions of southeastern St. Johns County through 430 PM EDT... At 347 PM EDT, Doppler radar was tracking a strong thunderstorm near Saint Augustine Shores, or 8 miles east of Hastings, moving north at 10 mph. HAZARD...Minor flooding due to heavy rainfall. SOURCE...Radar indicated. IMPACT...Minor flooding due to heavy rainfall is possible. Locations impacted include... Saint Augustine Shores and Dupont Center. PRECAUTIONARY/PREPAREDNESS ACTIONS... If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 2963 8135 2963 8150 2983 8139 2981 8129 TIME...MOT...LOC 1947Z 197DEG 8KT 2975 8137 MAX HAIL SIZE...0.00 IN MAX WIND GUST...<30 MPH DD
Special Weather Statement
National Weather Service Jacksonville FL
421 PM EDT Thu Jun 3 2021
FLZ033-038-133-137-032100-
Coastal St. Johns FL-Inland Flagler FL-Eastern Putnam FL-
Inland St. Johns FL-
421 PM EDT Thu Jun 3 2021
...A strong thunderstorm will impact portions of northwestern
Flagler, southeastern St. Johns and east central Putnam Counties
through 500 PM EDT...
At 420 PM EDT, Doppler radar was tracking a strong thunderstorm near
Hastings, moving northeast at 20 mph.
HAZARD...Wind gusts up to 50 mph, penny size hail, and minor
flooding due to heavy rainfall.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible. Minor flooding due to heavy rainfall is possible.
Locations impacted include...
Hastings, East Palatka, Crescent Beach, San Mateo, Saint Augustine
Shores, Spuds, Dupont Center and Elkton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 2953 8154 2959 8164 2987 8138 2973 8122
TIME...MOT...LOC 2020Z 217DEG 16KT 2967 8147
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
DDThe Jacksonville radar (KJAX), 88 km away, was scanning. The volume nearest the first event began at 20:42 UTC.
1 thunderstorm wind. Local standard time, as filed.
A tree was blown down across North Street in Hastings.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2021Every state in 2021This day in weather historyWarnings in Florida, June 2021
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: 959765.