Alert archive / Florida / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 53, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at May 19, 2015, 5:45 PM EDT for Nassau 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
- May 19, 2015, 5:45 PM EDT (21:45 UTC)
- Expired
- May 19, 2015, 6:15 PM EDT
- In force
- 30 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
County Nassau County, FL
The radar
The Jacksonville radar (KJAX), 16 km from the middle of the area, began a volume at 21:47 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, 9.8 hours before the alert went out and 14 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
- 709 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 714 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 31 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 May 19, 2:21 PM EDT, 3 hours 24 minutes earlier.
Area forecast discussion, May 19, 2:21 PM EDT, 3 hours 24 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 221 PM EDT TUE MAY 19 2015 .NEAR TERM /THROUGH TONIGHT/... SCATTERED SHOWER/STORM ACTIVITY STRUGGLING TO GET STARTED IN NORTHWEST STEERING FLOW WITH JUST A FEW SHOWERS AS OF 2PM ACROSS INLAND NORTHEAST FLORIDA. STILL EXPECT 40-60% COVERAGE ACROSS MOST OF NE FL/SE GA LATE THIS AFTERNOON/EARLY EVENING AS BOTH GULF AND ATLC SEA BREEZES PUSH INLAND AND A FEW OF THE CELL MERGERS MAY BE ENOUGH TO TRIGGER A FEW STRONG STORMS /SMALL HAIL, GUSTY WINDS AND LIGHTNING/ WITH LOCALIZED HEAVY RAINFALL DUE TO SLOW STORM MOTION. MAIN AXIS OF STORMS IS STILL EXPECTED TO BE JUST INLAND FROM THE COAST BETWEEN THE I-95 AND U.S. 301 CORRIDORS ACROSS BOTH SE GA AND NORTHEAST FLORIDA. ACTIVITY WILL LINGER INTO THE EVENING HOURS WITH OUTFLOWS TRIGGERING MORE STORMS FURTHER INLAND ACRS INLD SE GA BUT OVERALL EXPECT ACTIVITY TO DECLINE AFTER SUNSET /LOSS OF HEATING/ AND ENDING JUST AFTER MIDNIGHT. FAIR SKIES WITH DECREASING CONVECTIVE DEBRIS CLOUDS OVERNIGHT WITH SOME PATCHY LIGHT FOG POSSIBLE TOWARDS MORNING NEAR RAIN COOLED AREAS. OVERALL MIN TEMPS NEAR 70 DEGREES. .SHORT TERM (WEDNESDAY THROUGH FRIDAY NIGHT)... A WEAK COLD FRONT WILL SAG SOUTH TOWARDS THE REGION...AS A BROAD SURFACE LOW FORMS ALONG IT ACROSS SOUTH GA AND SLOWLY MOVES NE. THE FRONT WILL MAKE IT INTO SE GA ON THURSDAY AND ACROSS NE FL FRIDAY AND WILL BE A FOCUS FOR CONVECTION AS STORMS FORM ALONG AND AHEAD OF IT AND MOVE SE WITH THE STEERING FLOW. MODELS CONTINUE TO INDICATE TEMPS ALOFT WILL REMAIN FAIRLY COOL (AROUND -10C) SO A FEW STORMS MAY BE STRONG. HAVE CONTINUED WITH PREVIOUS FCST OF SCATTERED MAINLY AFTERNOON AND EARLY EVENING STORMS THAT WILL COINCIDE WITH HEATING. POPS WILL BE MAINLY CONFINED ACROSS NE FL...SOUTH OF THE I-10 CORRIDOR... ON FRIDAY AS DRIER AIR NORTH OF THE FRONTAL BOUNDARY WILL LIMIT CONVECTION. HOT AFTERNOON TEMPS IN THE LOWER/MID 90S INLAND AND MID/UPPER 80S COAST BEFORE THE ONSET OF SHOWERS/STORMS. .LONG TERM /SATURDAY THROUGH TUESDAY/... A RIDGE/WEDGE SETUP IS LIKELY FOR THE WEEKEND INTO EARLY NEXT WEEK... WITH SLIGHT CHANCE TO LOW END CHANCE POPS MAINLY MIGRATING IN FROM THE ATLANTIC. AS ONSHORE FLOW DEVELOPS...SEASONABLY HOT DAYTIME TEMPERATURES FRIDAY WILL COOL TO SLIGHTLY BELOW NORMAL DURING THE REST OF THE PERIOD. SEASONABLY WARM LOW TEMPERATURES WILL PREVAIL. && .AVIATION... STILL PRIMARILY VFR THIS AFTERNOON SO FAR AND EXPECT SCATTERED SHOWERS AND STORMS TO DEVELOP ON SEA BREEZE AS IT MOVES INLAND AND HAVE TRIMMED DOWN TEMPO MVFR THUNDERSTORM TIMES TO MAINLY BTWN 21-24Z...BUT STILL BARELY SUPPORTED BY CURRENT 40-50% POPS AND HAVE CONTINUED TO INCLUDE POSSIBLE GUSTY WINDS (VRB15G25KT) THE ACTIVITY AT TAF SITES SHOULD END AROUND 02-03Z WITH JUST VFR CONVECTIVE DEBRIS CLOUDS OVERNIGHT...ANY MVFR FOG ISSUES WILL DEPEND ON WHETHER RAIN OCCURS AT ANY SPECIFIC TAF LOCATION AND WILL BE ADDRESSED IN LATER TAF ISSUANCES. && .MARINE... SOUTH TO SOUTHWEST FLOW AT 10-15 KNOTS WITH LOCAL SELY SEA BREEZES ALONG THE COAST THROUGH THURSDAY...WITH SEAS 2-4 FT THEN HIGH PRESSURE BUILDS DOWN THE MID ATLC COAST INTO THE CAROLINAS LATE FRIDAY INTO THE WEEKEND AND WINDS WILL BECOME ONSHORE AND MAY INCREASE CLOSE TO 15-20 KNOTS WITH SEAS BUILDING INTO THE 4-6 FT RANGE AND HEADLINES/ADVISORIES MAY BE NEEDED. RIP CURRENTS: LOW TO MODERATE RISK OF RIPS WILL CONTINUE THIS WEEK. && .PRELIMINARY POINT TEMPS/POPS... AMG 69 93 68 92 / 30 40 20 30 SSI 73 87 73 89 / 30 40 40 30 JAX 71 91 71 91 / 40 40 40 30 SGJ 71 87 72 88 / 30 40 40 30 GNV 70 91 70 91 / 30 40 30 30 OCF 70 90 70 90 / 20 30 20 30 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && HESS/PETERSON/GUILLET
Hazardous weather outlook, May 19, 4:48 AM EDT, 12 hours 57 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 448 AM EDT TUE MAY 19 2015 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125- GAZ132>136-149>154-162>166-200830- 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- 448 AM EDT TUE MAY 19 2015 ...MODERATE RISK OF RIP CURRENTS TODAY... ...ISOLATED STRONG STORMS POSSIBLE THIS AFTERNOON AND EARLY EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA... SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT... MODERATE RISK FOR RIP CURRENTS AT AREA BEACHES. LIFE THREATENING RIP CURRENTS ARE POSSIBLE IN THE SURF ZONE. SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING. ISOLATED STRONG STORMS ARE POSSIBLE WITH FREQUENT CLOUD TO GROUND LIGHTNING AND GUSTY WINDS THE MAIN THREATS. SLOW STORM MOTION GENERALLY TO THE EAST AT 5 MPH MAY ALSO PRODUCE LOCALLY HEAVY RAINFALL. MOST STORM ACTIVITY SHOULD WEAKEN AND DISSIPATE AFTER 9 PM THIS EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... THERE IS A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS WEDNESDAY THROUGH THURSDAY. A FEW STORMS MAY BE STRONG WITH THE MAIN THREATS FREQUENT LIGHTNING...GUSTY WINDS...AND LOCALLY HEAVY RAINFALL. AN INCREASED RISK OF DANGEROUS RIP CURRENTS IS POSSIBLE SATURDAY THROUGH MONDAY DUE TO MODERATE ONSHORE FLOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. 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, May 19, 5:00 PM EDT, 45 minutes before
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</html>Special weather statement, May 19, 5:25 PM EDT, 20 minutes before
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</html>Special weather statement, May 19, 5:38 PM EDT, 7 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 |
|---|---|---|---|---|
| May 19, 4:13 PM EDT | Special Weather Statement | JAX | Nassau | 47 min |
| May 19, 4:44 PM EDT | Severe Thunderstorm Warning | JAX | Duval | 31 min |
| May 19, 4:55 PM EDT | Special Weather Statement | JAX | Bradford | 35 min |
| May 19, 5:12 PM EDT | Severe Thunderstorm Warning | JAX | Duval | 33 min |
| May 19, 5:30 PM EDT | Special Weather Statement | JAX | Nassau | 30 min |
| May 19, 5:38 PM EDT | Special Weather Statement | JAX | Duval | 37 min |
| May 19, 5:58 PM EDT | Severe Thunderstorm Warning | JAX | Duval, Nassau | 32 min |
| May 19, 6:24 PM EDT | Areal Flood Advisory | JAX | Duval, Nassau | 96 min |
| May 19, 6:24 PM EDT | Special Weather Statement | JAX | Baker | 51 min |
| May 19, 6:31 PM EDT | Special Weather Statement | JAX | Nassau | 29 min |
| May 19, 6:46 PM EDT | Severe Thunderstorm Warning | JAX | Baker | 29 min |
| May 19, 6:54 PM EDT | Special Weather Statement | JAX | Columbia, Hamilton, Suwannee | 51 min |
| May 19, 7:17 PM EDT | Special Weather Statement | JAX | Union | 43 min |
| May 19, 7:30 PM EDT | Severe Thunderstorm Warning | JAX | Columbia, Hamilton, Suwannee | 30 min |
| May 19, 7:59 PM EDT | Special Weather Statement | JAX | Hamilton | 46 min |
| May 18, 8:51 PM EDT | Special Weather Statement | JAX | Bacon | 39 min |
| May 19, 4:21 PM EDT | Special Weather Statement | JAX | Brantley | 39 min |
| May 19, 4:29 PM EDT | Special Weather Statement | JAX | Ware | 46 min |
| May 19, 4:36 PM EDT | Special Weather Statement | JAX | Camden | 39 min |
| May 19, 4:42 PM EDT | Severe Thunderstorm Warning | JAX | Camden | 33 min |
| May 19, 4:42 PM EDT | Severe Thunderstorm Warning | JAX | Brantley, Pierce, Ware | 48 min |
| May 19, 4:53 PM EDT | Special Weather Statement | JAX | Glynn | 52 min |
| May 19, 4:57 PM EDT | Special Weather Statement | JAX | Camden | 48 min |
| May 19, 5:06 PM EDT | Severe Thunderstorm Warning | JAX | Camden | 39 min |
| May 19, 5:25 PM EDT | Special Weather Statement | JAX | Bacon | 50 min |
| May 19, 5:37 PM EDT | Severe Thunderstorm Warning | JAX | Bacon, Coffee | 23 min |
| May 19, 5:42 PM EDT | Special Weather Statement | JAX | Clinch | 48 min |
| May 19, 5:54 PM EDT | Severe Thunderstorm Warning | JAX | Coffee | 36 min |
| May 19, 6:27 PM EDT | Special Weather Statement | JAX | Wayne | 48 min |
| May 19, 6:44 PM EDT | Special Weather Statement | JAX | Coffee | 46 min |
| May 19, 7:28 PM EDT | Special Weather Statement | JAX | Wayne | 47 min |
| May 19, 7:48 PM EDT | Special Weather Statement | JAX | Atkinson | 57 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2015Every severe thunderstorm warning in 2015
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.