Alert archive / Florida / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 107, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 1, 2007, 1:54 PM EDT for Nassau 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 counties it named.
The facts
- Issued
- Jul 1, 2007, 1:54 PM EDT (17:54 UTC)
- Expired
- Jul 1, 2007, 2:45 PM EDT
- In force
- 51 min
- Issued by
- NWS Jacksonville, FL
- Area
- Counties, with a storm outline in the text
County Nassau County, FL
The radar
The Jacksonville radar (KJAX), 16 km from the middle of the area, began a volume at 17:55 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, 5.9 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
- 2360 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 780 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- -9 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 1, 9:04 AM EDT, 4 hours 50 minutes earlier.
Area forecast discussion, Jul 1, 9:04 AM EDT, 4 hours 50 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 904 AM EDT SUN JUL 1 2007 .UPDATE... A SWATH OF MID/HI CLOUDS OVER THE PANHANDLE EWD ALONG I-10 CORRIDOR AND GA/FL BORDER IS SPILLING OVER A RIDGE IN THE GULF AND IS MOSTLY DEBRIS FROM STORMS LAST NIGHT. THESE CLOUDS ARE SLOWLY DISSIPATING BUT NEVERTHELESS WILL INHIBIT HEATING SOMEWHAT. MID LEVEL TROUGH EXTENDS FROM THE OUTER BANKS TO EAST OF OUR OFFSHORE WATERS THEN TURNS BACK ACROSS THE FL PENINSULA. THE SURFACE FRONT STRETCHES ACRS CENTRAL GA. THIS FRONT WILL BE FOCUS FOR CONVECTION TODAY AS IT SAGS SOUTH AND SOME STRONG STORMS ARE POSSIBLE. AS HIGHLIGHTED IN THE HWO...HEAVY RAINFALL COULD CAUSE LOCALIZED FLOODING...BUT HOPEFULLY THIS WILL BE A MINOR INCONVENIENCE SINCE THE REGION NEEDS THE RAIN. HAVE DONE MINOR TWEAKING OF GRIDS...LOWERED POPS FOR MORNING HOURS ONLY AND ADJUSTED TEMPS FOR CURRENT CONDITIONS. && .AVIATION...AT NEXT ISSUANCE WILL ADJUST PROB30 FOR TS SINCE WILL KNOW MORE ABOUT TIMING OF CONVECTION. && .MARINE...MOSTLY QUIESCENT CONDITIONS EXIST ON THE WATERS THIS MORNING. SEAS ARE RUNNING 3 FT AT THE BUOYS EXCEPT SABSOON TOWER (R2) HAS REPORTED 4-5 FT. SINCE ST. AUGUSTINE BUOY IS OUT OF COMMISSION...ANTICIPATE SEAS ARE 4-5 FT IN THAT AREA. HAVE MADE NO CHANGES TO WINDS/SEAS IN GRIDS. && .PRELIMINARY POINT TEMPS/POPS... AMG 95 71 88 71 / 50 40 50 30 SSI 88 76 83 75 / 50 30 50 30 JAX 92 74 87 72 / 40 30 70 30 SGJ 89 75 85 75 / 40 30 70 30 GNV 94 71 90 73 / 40 40 60 30 OCF 93 72 90 74 / 50 30 60 30 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && TRABERT/MCALLISTER
Hazardous weather outlook, Jul 1, 9:45 AM EDT, 4 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 945 AM EDT SUN JUL 1 2007 FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-021100- 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- 945 AM EDT SUN JUL 1 2007 THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA. .DAY ONE...REST OF TODAY AND TONIGHT... ...SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING... .THUNDERSTORM IMPACT...THUNDERSTORMS WILL DEVELOP THIS AFTERNOON OVER THE AREA AS A COLD FRONT TO THE NORTH SLOWLY APPROACHES THE AREA. ABUNDANT MOISTURE AND A SLOW STORM MOTION WILL RESULT IN LOCALLY HEAVY RAINFALL. THE STRONGER STORMS WILL ALSO PRODUCE DAMAGING DOWNBURSTS...HAIL AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... DEEP TROPICAL MOISTURE WILL REMAIN IN PLACE THROUGH MIDWEEK. UPPER LEVEL DISTURBANCES AND A COLD FRONT WILL TRIGGER SCATTERED TO NUMEROUS THUNDERSTORMS THROUGH WEDNESDAY. THE STRONGEST THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL AND STRONG GUSTY WINDS. THERE WILL BE A MODERATE RISK OF RIP CURRENTS ALONG THE GEORGIA COAST ON MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX. MKT
In the hours before
Special weather statement, Jul 1, 1:23 PM EDT, 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 123 PM EDT SUN JUL 1 2007 FLZ024-011815- NASSAU- 123 PM EDT SUN JUL 1 2007 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR NASSAU COUNTY FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID UNTIL 215 PM EDT... AT 123 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 5 MILES SOUTH OF HILLIARD...MOVING SOUTHEAST AT 10 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT AREAS AROUND HILLIARD...RATLIFF...CALLAHAN AND BRYCEVILLE THROUGH 215 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE. HEAVY RAINFALL WILL PRODUCE PONDING OF WATER ON ROADWAYS AND MINOR FLOODING OF LOW-LYING AREAS. ANOTHER STRONG THUNDERSTORM WAS IN SOUTHWESTERN NASSAU COUNTY WESTOF RATLIFF. THIS STORM MAY ALSO PRODUCE STRONG WINDS AND HEAVY RAINFALL. REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. WOLF
Special weather statement, Jul 1, 1:30 PM EDT, 24 minutes before
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</html>Special weather statement, Jul 1, 1:32 PM EDT, 22 minutes before
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</html>Local storm report, Jul 1, 1:34 PM EDT, 20 minutes before
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</html>Special weather statement, Jul 1, 1:39 PM EDT, 15 minutes before
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</html>Special weather statement, Jul 1, 1:42 PM EDT, 12 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 1, 1:29 PM EDT | Severe Thunderstorm Warning | JAX | Nassau | 46 min |
| Jul 1, 2:32 PM EDT | Severe Thunderstorm Warning | JAX | Duval | 47 min |
| Jul 1, 2:43 PM EDT | Severe Thunderstorm Warning | JAX | Nassau | 35 min |
| Jul 1, 12:50 PM EDT | Severe Thunderstorm Warning | JAX | Charlton | 40 min |
| Jul 1, 2:08 PM EDT | Severe Thunderstorm Warning | JAX | Camden | 52 min |
| Jul 1, 2:35 PM EDT | Severe Thunderstorm Warning | JAX | Ware | 40 min |
| Jul 1, 2:48 PM EDT | Severe Thunderstorm Warning | JAX | Brantley | 42 min |
| Jul 1, 2:53 PM EDT | Severe Thunderstorm Warning | JAX | Ware | 67 min |
| Jul 1, 3:12 PM EDT | Severe Thunderstorm Warning | JAX | Clinch | 48 min |
| Jul 1, 3:35 PM EDT | Severe Thunderstorm Warning | JAX | Bacon, Coffee | 40 min |
| Jul 1, 4:00 PM EDT | Severe Thunderstorm Warning | JAX | Clinch | 60 min |
| Jul 1, 4:00 PM EDT | Severe Thunderstorm Warning | JAX | Clinch | 45 min |
| Jul 1, 4:03 PM EDT | Severe Thunderstorm Warning | JAX | Ware | 42 min |
| Jul 1, 4:11 PM EDT | Severe Thunderstorm Warning | JAX | Atkinson | 49 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2007Every severe thunderstorm warning in 2007
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.