Alert archive / Florida / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 115, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 31, 2013, 4:44 PM EDT for Alachua County, Marion County, Florida. It was in force for 46 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
- Jul 31, 2013, 4:44 PM EDT (20:44 UTC)
- Expired
- Jul 31, 2013, 5:30 PM EDT
- In force
- 46 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
Counties Alachua County, FL, Marion County, FL
The radar
The Jacksonville radar (KJAX), 126 km from the middle of the area, began a volume at 20:44 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, 8.7 hours before the alert went out and 127 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
- 1861 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 685 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 16 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 Jul 31, 2:20 PM EDT, 2 hours 24 minutes earlier.
Area forecast discussion, Jul 31, 2:20 PM EDT, 2 hours 24 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 220 PM EDT WED JUL 31 2013 .SHORT TERM... SHORTWAVE TROF WILL MOVE ACROSS THE AREA THROUGH THE EVENING...PRODUCING NUMEROUS SHOWERS AND T-STORMS ESPECIALLY ACROSS EASTERN PART OF FORECAST AREA. ALSO EXPECTING TO SEE BAND OF SHOWERS/T-STORMS OVER CENTRAL GA MOVE EAST ACROSS SE GA THROUGH THE EVENING...SO HAVE LIKELY POPS THERE AS WELL. ACTIVITY SHOULD DECREASE AFTER MIDNIGHT...AND HAVE SHOWN TREND OF DECREASING HOURLY POPS. FOR WED...WEAK TROF ALOFT STILL OVER THE AREA...ANTICIPATING SCATTERED TO NUMEROUS AFTERNOON SHOWERS/T-STORMS...BEST COVERAGE EXPECTED OVER OUR EASTERN COUNTIES WITH SEA BREEZE. WITH MORE CLOUD COVER OVER AREA...GOING WITH HIGH TEMPS AROUND 90 INLAND, MID/UPR 80S COAST. .LONG TERM... THURSDAY-SATURDAY...COLD FRONT WILL CONTINUE TO MOVE SOUTH TOWARDS THE AREA. A MOIST AND UNSTABLE SW FLOW AHEAD OF IT WILL LEAD TO SCATTERED TO NUMEROUS MAINLY AFTERNOON AND EARLY EVENING STORMS. THE EXCEPTION IS THAT THERE WILL BE LESS COVERAGE OF STORMS ACROSS SE GA ON FRIDAY AND SATURDAY AS DRIER AIR BEGINS TO MOVE INTO THERE. HOWEVER...MAX TEMPS THERE WILL WARM TO SLIGHTLY ABOVE CLMO. SUN THROUGH WED AN UNSETTLED PATTERN DEVELOPS AS MEAN LAYER TROUGHING AND HIGH MOISTURE CONTENT (PWATS OVER 2-2.25 INCHES) POSITION AND LINGER OVER THE REGION. EXPECT PREVAILING SW FLOW THROUGH THE PERIOD WHICH WILL BRING A DOMINATE WEST COAST SEA BREEZE REGIME. WILL CONTINUE TO CAP RAIN CHANCES FOR ALL AREAS AROUND 50%...BUT AS THE DAYS NEAR SUSPECT HIGHER RAIN CHANCES OF 6O-70% MAY BE NEEDED AS TIMING AND FEATURES BECOME BETTER RESOLVED. TEMPS WILL HOVER AROUND CLIMO VALUES WITH HIGHS IN THE LOW/MID 90S AND MUGGY NIGHTS WITH LOWS IN THE LOW/MID 70S. && .AVIATION...VFR CONDITIONS OUTSIDE OF AFTERNOON/EVENING SHRA/TSRA. POTENTIAL FOR GUSTY WINDS AROUND STRONGER TSRA. BEST CHANCE OF TSRA IN THE 18Z-00Z TIMEFRAME AT TAF SITES. SHOULD SEE COVERAGE DECREASE AFTER 00Z. HAVE VCTS UNTIL ABOUT 04Z. && .MARINE...NO HEADLINES. MAIN CONCERN WILL BE ISOLATED STORMS NEAR SHORE. RIP CURRENTS: LOW TO MODERATE RISK OF RIP CURRENTS THROUGH THURSDAY. && .PRELIMINARY POINT TEMPS/POPS... AMG 72 89 72 93 / 70 30 30 30 SSI 75 86 76 88 / 70 60 50 30 JAX 73 89 73 91 / 70 60 50 40 SGJ 74 87 73 88 / 30 60 50 40 GNV 73 89 72 91 / 50 40 40 40 OCF 73 89 72 91 / 50 60 40 50 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && WOLF/PETERSON/
Hazardous weather outlook, Jul 31, 10:32 AM EDT, 6 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 1032 AM EDT WED JUL 31 2013 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040- GAZ132>136-149>154-162>166-010845- ALTAMAHA SOUND GA TO FERNANDINA BEACH FL OUT 20 NM- FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20 NM- ST AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM- ALTAMAHA SOUND GA TO FERNANDINA BEACH FL 20 NM TO 60 NM OFFSHORE- FERNANDINA BEACH TO ST AUGUSTINE FL 20 NM TO 60 NM OFFSHORE- ST AUGUSTINE TO FLAGLER BEACH FL 20 NM TO 60 NM OFFSHORE-HAMILTON- SUWANNEE-COLUMBIA-BAKER-NASSAU-DUVAL-UNION-BRADFORD-CLAY-ST JOHNS- GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COFFEE-JEFF DAVIS-BACON- APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-INLAND GLYNN- COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-COASTAL CAMDEN- 1032 AM EDT WED JUL 31 2013 ...RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE REGION... ...MODERATE RISK OF RIP CURRENTS NORTHEAST FLORIDA BEACHES TODAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA... SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT... SCATTERED TO NUMEROUS AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED. A FEW OF THESE STORMS MAY BE STRONG WITH FREQUENT LIGHTNING...TORRENTIAL DOWNPOURS...AND GUSTY WINDS. OVER THE NEARSHORE COASTAL WATERS...A FEW STORMS ARE EXPECTED AND MAY PRODUCE GUSTY WINDS UP TO 35 KNOTS IN THE LATE AFTERNOON. A MODERATE RISK OF RIP CURRENTS ANTICIPATED AT NORTHEAST FLORIDA BEACHES DUE TO INCREASED EASTERLY SWELLS. FOR MAXIMUM SAFETY... ALWAYS SWIM WITHIN SIGHT OF LIFEGUARDS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... NUMEROUS THUNDERSTORMS ARE EXPECTED ON THURSDAY. A FEW OF THESE STORMS MAY BE STRONG WITH GUSTY WINDS AND HEAVY DOWNPOURS. AN ISOLATED SEVERE STORM WILL ALSO BE POSSIBLE. SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED EACH DAY FRIDAY THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT REQUESTED AT THIS TIME. 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, Jul 31, 3:13 PM EDT, 1 hour 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
313 PM EDT WED JUL 31 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM TSTM WND DMG YULEE 30.63N 81.57W
07/31/2013 NASSAU FL COUNTY OFFICIAL
LARGE TREE DOWN WITH SIGNIFICANT DAMAGE TO HOUSE AT 86190
PAGES DAIRY ROAD.
&&
ZALLENSpecial weather statement, Jul 31, 3:35 PM EDT, 1 hour 9 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 |
|---|---|---|---|---|
| Jul 31, 1:48 PM EDT | Special Weather Statement | JAX | Nassau | 42 min |
| Jul 31, 2:15 PM EDT | Special Weather Statement | JAX | Nassau | 45 min |
| Jul 31, 2:20 PM EDT | Severe Thunderstorm Warning | JAX | Nassau | 40 min |
| Jul 31, 2:24 PM EDT | Areal Flood Advisory | JAX | Baker, Nassau | 2 hr |
| Jul 31, 2:26 PM EDT | Special Weather Statement | JAX | Suwannee | 49 min |
| Jul 31, 3:04 PM EDT | Areal Flood Advisory | JAX | Clay, Duval, Nassau, Saint Johns | 116 min |
| Jul 31, 3:06 PM EDT | Special Weather Statement | JAX | Columbia | 39 min |
| Jul 31, 3:29 PM EDT | Severe Thunderstorm Warning | JAX | Columbia | 46 min |
| Jul 31, 3:35 PM EDT | Special Weather Statement | JAX | Clay | 40 min |
| Jul 31, 3:46 PM EDT | Special Weather Statement | JAX | Gilchrist | 44 min |
| Jul 31, 4:02 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Bradford, Columbia, Union | 43 min |
| Jul 31, 4:22 PM EDT | Areal Flood Advisory | JAX | Clay, Saint Johns | 113 min |
| Jul 31, 4:29 PM EDT | Special Weather Statement | JAX | Alachua | 46 min |
| Jul 31, 5:00 PM EDT | Areal Flood Advisory | JAX | Alachua, Marion | 2 hr |
| Jul 31, 5:38 PM EDT | Special Weather Statement | JAX | Putnam | 52 min |
| Jul 31, 5:39 PM EDT | Flash Flood Warning | JAX | Alachua | 111 min |
| Jul 31, 5:52 PM EDT | Special Weather Statement | JAX | Marion | 53 min |
| Jul 31, 6:52 PM EDT | Special Weather Statement | JAX | Flagler | 23 min |
| Jul 31, 7:31 PM EDT | Tornado Warning | JAX | Hamilton, Suwannee | 29 min |
| Jul 30, 8:11 PM EDT | Special Weather Statement | JAX | Echols | 34 min |
| Jul 31, 1:50 PM EDT | Special Weather Statement | JAX | Camden | 40 min |
| Jul 31, 1:54 PM EDT | Areal Flood Advisory | JAX | Camden | 2 hr |
| Jul 31, 2:10 PM EDT | Areal Flood Advisory | JAX | Camden | 2 hr |
| Jul 31, 2:39 PM EDT | Special Weather Statement | JAX | Camden | 51 min |
| Jul 31, 4:15 PM EDT | Special Weather Statement | JAX | Ware | 45 min |
| Jul 31, 5:15 PM EDT | Areal Flood Advisory | JAX | Brantley, Pierce, Ware | 2 hr |
Nearby
Severe Thunderstorm Warnings in Florida, 2013Every severe thunderstorm warning in 2013
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.