Alert archive / Florida / Special Weather Statements in 2012
Special Weather Statement, NWS Jacksonville, FL
NWS Jacksonville, FL issued this special weather statement at Aug 11, 2012, 2:17 PM EDT for Nassau County, Florida. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 11, 2012, 2:17 PM EDT (18:17 UTC)
- Expired
- Aug 11, 2012, 2:45 PM EDT
- In force
- 28 min
- Issued by
- NWS Jacksonville, FL
County Nassau County, FL
The radar
The Jacksonville radar (KJAX), 22 km from the middle of the area, began a volume at 18:20 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, 6.3 hours before the alert went out and 23 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
- 828 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 11, 2:14 PM EDT, 3 minutes earlier.
Area forecast discussion, Aug 11, 2:14 PM EDT, 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 214 PM EDT SAT AUG 11 2012 .SHORT TERM... SATELLITE IMAGERY SHOWS A SERIES OF SHORTWAVES ALONG THE GULF COAST WITH THE INITIAL SHORTWAVE TROUGH PUSHING EAST ACROSS THE FORECAST AREA EARLY THIS AFTN...AND LINING UP WITH A SURFACE TROUGH STRETCHING FROM THE FL PANHANDLE ACRS SRN GA INTO SC. STORMS ARE ALSO FIRING ALONG THE ATLANTIC SEA BREEZE AND WILL LIKELY HAVE SOME STRONGER STORMS LATER IN THE AFTN AS THESE FEATURES COLLIDE. PWATS OF 2+ INCHES ARE FORECAST FOR THE FORECAST AREA THROUGH TONGT. GUSTY WINDS AND LOCALLY HEAVY RAINS CAN BE EXPECTED. THE ACTIVITY WILL MOSTLY DISSIPATE BY MIDNIGHT EXCEPT FOR SHOWERS REMAINING ALONG THE BIG BEND REGION OF THE GULF COAST. COULD SEE SOME SHOWERS MOVING TOWARD I-75 LATE TONIGHT. SUNDAY THROUGH TUESDAY...UPPER SHORTWAVE TROUGH WILL LIFT NE OFF THE EAST COAST ON SUNDAY BRINGING DRIER AIR ALOFT INTO SE GA. WILL KEEP SCATTERED POPS CONFINED TO NE FL AND COASTAL SE GA NEAR SEABREEZE FRONT FOR SUNDAY AND MONDAY. UPPER TROUGH WILL AMPLIFY AGAIN ON TUESDAY AS A SHORT WAVE APPROACHES THE EAST COAST. WILL GO WITH SCATTERED POPS AREA WIDE ON TUE. SOUTHWEST STEERING FLOW WILL RESULT IN SEABREEZE COLLISIONS NEAR THE EAST COAST EACH DAY DURING THE LATE AFTERNOON AND EARLY EVENING HOURS. TEMPERATURES WILL BE AT OR SLIGHTLY ABOVE CLIMO LEVELS. .LONG TERM...WEDNESDAY THROUGH SATURDAY...UPPER RIDGE WILL REMAIN TO THE SOUTH WITH TROUGHING TO THE NORTH THROUGH THE PERIOD. A WESTERLY STEERING FLOW WITH PWATS MOSTLY IN 1.75-2" RANGE WILL RESULT IN SCATTERED AFTERNOON CONVECTION EACH DAY REACHING THE EAST COAST BY LATE AFTERNOON/EARLY EVENING. && .AVIATION... && .MARINE...SOUTHWEST FLOW WILL DOMINATE THE NEXT SEVERAL DAYS. NOCTURNAL SURGES WILL INCREASE WINDS TO AROUND 15 KNOTS OFFSHORE AND SCEC HEADLINES MAY BE NEEDED. SEAS WILL BE MOSTLY BE IN 2 TO 3 FOOT RANGE. LATE DAY STORMS WILL BE POSSIBLE AS STORMS OVER LAND MOVE INTO THE WATERS. RIP CURRENTS: LOW RISK THROUGH SUNDAY. && .PRELIMINARY POINT TEMPS/POPS... AMG 71 93 71 95 / 50 10 0 10 SSI 76 92 77 90 / 50 20 20 10 JAX 72 94 74 94 / 50 40 40 30 SGJ 75 92 76 91 / 50 30 30 40 GNV 72 93 74 94 / 40 30 20 50 OCF 72 94 74 95 / 40 40 20 50 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && ZIBURA/TRABERT/WALKER
Hazardous weather outlook, Aug 11, 4:05 AM EDT, 10 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 405 AM EDT SAT AUG 11 2012 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040- GAZ132>136-149>154-162>166-121000- 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- 405 AM EDT SAT AUG 11 2012 THIS OUTLOOK IS FOR NORTHEAST FLORIDA...SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS. ...ISOLATED STRONG STORMS POSSIBLE TODAY... .DAY ONE...TODAY AND TONIGHT... SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS SOUTHEAST GEORGIA LATE THIS MORNING AND EARLY AFTERNOON AND SPREAD INTO COASTAL SOUTHEAST GEORGIA AND NORTHEAST FLORIDA THIS AFTERNOON AND EVENING. STORM MOTION WILL BE TOWARDS THE EAST-NORTHEAST AROUND 15 MPH. A FEW STORMS MAY BECOME STRONG WITH GUSTY WINDS...EXCESSIVE LIGHTNING AND LOCALLY HEAVY RAINFALL. THE BEST CHANCES FOR STRONG STORMS WILL BE ACROSS SOUTHEAST GEORGIA. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY... SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS WILL BE POSSIBLE THROUGH THE PERIOD. A FEW STRONG STORMS WILL BE POSSIBLE. .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. JCH
In the hours before
Special weather statement, Aug 11, 2:17 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 217 PM EDT SAT AUG 11 2012 FLZ024-025-111845- DUVAL-NASSAU- 217 PM EDT SAT AUG 11 2012 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR WESTERN DUVAL AND SOUTHWESTERN NASSAU COUNTIES FOR STRONG WINDS VALID UNTIL 245 PM EDT... AT 217 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED OVER BRYCEVILLE...OR 14 MILES SOUTHWEST OF CALLAHAN...MOVING NORTHEAST AT 15 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT AREAS AROUND BRYCEVILLE THROUGH 245 PM EDT. GUSTY WINDS OF 40 TO 50 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR WIND DAMAGE. REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. LAT...LON 3050 8189 3035 8180 3032 8198 3039 8202 TIME...MOT...LOC 1817Z 247DEG 15KT 3038 8194 ZIBURA
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 3:13 PM EDT | Special Marine Warning | JAX | 47 min | |
| Aug 11, 3:53 PM EDT | Special Marine Warning | JAX | 67 min | |
| Aug 11, 4:29 PM EDT | Special Weather Statement | JAX | Duval | 31 min |
| Aug 11, 4:32 PM EDT | Special Marine Warning | JAX | 118 min | |
| Aug 11, 4:47 PM EDT | Special Weather Statement | JAX | Saint Johns | 28 min |
| Aug 11, 5:00 PM EDT | Special Marine Warning | JAX | 30 min | |
| Aug 11, 5:00 PM EDT | Special Marine Warning | JAX | 90 min | |
| Aug 11, 5:11 PM EDT | Special Weather Statement | JAX | Flagler | 49 min |
| Aug 11, 2:46 PM EDT | Special Weather Statement | JAX | Wayne | 29 min |
| Aug 11, 3:44 PM EDT | Special Weather Statement | JAX | Wayne | 31 min |
| Aug 11, 4:06 PM EDT | Severe Thunderstorm Warning | JAX | Camden, Glynn | 24 min |
| Aug 11, 4:27 PM EDT | Severe Thunderstorm Warning | JAX | Camden, Glynn | 33 min |
Nearby
Special Weather Statements in Florida, 2012Every special weather statement in 2012
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.