Alert archive / Florida / Special Weather Statements in 2012
Special Weather Statement, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this special weather statement at Dec 10, 2012, 5:39 PM EST for Pinellas County, Florida. It was in force for 66 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
- Dec 10, 2012, 5:39 PM EST (22:39 UTC)
- Expired
- Dec 10, 2012, 6:45 PM EST
- In force
- 66 min
- Issued by
- NWS Tampa Bay, FL
County Pinellas County, FL
The radar
The Tampa radar (KTBW), 47 km from the middle of the area, began a volume at 22:41 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
Tampa Bay, FL (KTBW), launched 12:00Z, 10.7 hours before the alert went out and 47 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
- 18 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 Tampa Bay, FL wrote its last area forecast discussion before this special weather statement went out at Dec 10, 1:59 PM EST, 3 hours 40 minutes earlier.
Area forecast discussion, Dec 10, 1:59 PM EST, 3 hours 40 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 159 PM EST MON DEC 10 2012 ...STRONG TO SEVERE THUNDERSTORMS ON TUESDAY... ...POTENTIAL SEA FOG TUESDAY INTO WEDNESDAY... .SHORT TERM (MONDAY THROUGH WEDNESDAY)... PATTERN CHANGE AHEAD AS THE RIDGE OF HIGH PRESSURE THAT HAS BEEN PRESENT OVER THE REGION EXITS IN FAVOR OF A FRONTAL SYSTEM DUE ON WEDNESDAY INTO THURSDAY. MONDAY AND TUESDAY WILL FEATURE ELEVATED CHANCES FOR SHOWERS AND THUNDERSTORMS AHEAD OF THE FRONT...SPC ALREADY HAS MOST OF CENTRAL AND SOUTHWEST FLORIDA IN A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY. PLENTY OF AVAILABLE MOISTURE AND INSTABILITY ON TUESDAY AFTERNOON...WITH 12Z GFS MUCAPE VALUES ABOVE 2000 J/KG ACROSS MUCH OF THE CWA. 12Z NAM HAS MUCAPES NEARING 2500 J/KG AROUND FORT MYERS WHILE THE 00Z ECMWF HAS A MORE RESERVED 1500 J/KG. 0-6 KM BULK SHEAR IS A RESPECTABLE 25-35 KTS OVER MUCH OF THE CWA WITH 0-1 KM BULK SHEAR VALUES IN THE 5-15 KT NEIGHBORHOOD. WHILE THIS WOULD FAVOR THE POSSIBILITY OF STRONG TO SEVERE THUNDERSTORMS...ESPECIALLY IF THE GFS SOLUTION VERIFIES...TORNADIC ACTIVITY IS NOT LIKELY WITH 0-1 KM HELICITY VALUES STRUGGLING TO GET TO 50 M2/S2. HEAVY RAINFALL IS A POSSIBILITY...WITH THE POSSIBILITY OF FLASH FLOODING IF AN AREA WERE TO SEE SEVERAL PRODUCTIVE THUNDERSTORMS IN A RELATIVELY SHORT PERIOD OF TIME. DUE TO THE LIKELY NATURE OF THIS CONVECTION...ANY FLOOD THREAT WOULD BE ISOLATED. WITH FORECAST SOUNDINGS FEATURING PRECIPITABLE WATER VALUES BETWEEN 1.75 AND 2 INCHES...HEAVY RAINFALL IS LIKELY WITH THE CONVECTION. THANKFULLY THE LACK OF RECENT RAINFALL SHOULD ALLOW PLENTY OF ROOM IN RIVERS...LAKES...STREAMS...AND RESERVOIRS FOR THIS ADDITIONAL RAINFALL. BESIDES CONVECTION...A SIGNIFICANT SEA FOG EVENT COULD EVOLVE OVER THE NEXT DAY OR SO WHICH WOULD AFFECT COASTAL AREAS AND AREAS AROUND TAMPA BAY. INLAND AREAS COULD DEAL WITH FOG AS WELL...ALTHOUGH THE DEGREE OF FOG INTENSITY WILL LIKELY DEPEND ON HOW MUCH LOWER LEVEL MOISTURE IS DEPOSITED BY RAINFALL. .LONG TERM (WEDNESDAY NIGHT-SUNDAY)... NO CHANGES TO LONG TERM FROM THE MIDNIGHT SHIFT. /ISSUED 407 AM EST MON DEC 10 2012/ SURFACE LOW PRESSURE WILL BE LIFTING OUT TO THE NE WITH THE COLD FRONT MOVING SOUTH AS HIGH PRESSURE BRINGS COOLER AND DRIER CONDITIONS...WHILE ALOFT A SHORTWAVE WILL BE SWINGING THROUGH THE STATE FOR WEDNESDAY NIGHT. A LINGERING SHOWER OR TWO WILL BE POSSIBLE WEDNESDAY NIGHT BEFORE THE DRIER AIR OVERSPREADS THE AREA. HIGH PRESSURE WILL THEN CONTINUE ACROSS THE AREA THROUGH SATURDAY WITH UPPER RIDGING IN PLACE OVER THE GULF OF MEXICO. A COLD FRONT WILL THEN SETTLE INTO NORTHERN FLORIDA FOR SATURDAY NIGHT AND SUNDAY ALLOWING FOR SOME LOW RAIN CHANCES SUNDAY AFTERNOON. TEMPERATURES AND MOISTURE WILL MODERATE THROUGH THE WEEKEND WITH LOWS FROM THE MID 40-LOWER 50S NORTH TO THE MID 50S- LOWER 60S CENTRAL AND SOUTH TO START THE PERIOD INCREASING TO THE 50S TO LOWER 60S THROUGH SATURDAY NIGHT...HIGHS IN THE 70S TO AROUND 80 EACH AFTERNOON. && .AVIATION... AN INCREASINGLY MOIST AND UNSTABLE AIRMASS WILL SUPPORT TEMPO PERIODS OF MVFR CONDITIONS AT ALL TERMINALS THROUGH 11/00Z AS CEILING HEIGHTS LOWER AND SCATTERED SHOWERS DEVELOP OVER THE REGION. AFTER 11/00Z PREVAILING WIDESPREAD MVFR CONDITIONS ARE EXPECTED IN SHOWERS...WITH TEMPO IFR/LIFR CONDITIONS POSSIBLE BETWEEN 11/09Z AND 11/13Z AS LOW STRATUS AND DENSE FOG DEVELOPS. IFR/LIFR WILL IMPROVE INTO THE MVFR RANGE AFTER 11/14Z. SOUTH WINDS AROUND 10 KNOTS WILL INCREASE TO 12 TO 15 KNOTS WITH A FEW GUSTS UP TO 22 KNOTS POSSIBLE AFTER 10/20Z. SOUTH-SOUTHWEST WINDS WILL DIMINISH TO 5 TO 7 KNOTS AFTER 11/02Z TONIGHT. && .MARINE... SEA FOG RISK CONTINUES WITH SOUTHWESTERLY FLOW AHEAD OF THE FRONTAL PASSAGE WEDNESDAY INTO THURSDAY. LOCAL MODELING DEPICTING START OF SEA FOG EVENT ON THE COASTAL WATERS BETWEEN THE BAY AND BONITA BEACH THIS AFTERNOON WHILE THE NAM THROWS THE ENTIRE MAOR INTO A SEA FOG EVENT LATER THIS EVENING. WITH THE MODERATE CONFIDENCE FOR THIS SEA FOG EVENT LASTING THROUGH TOMORROW...HAVE THROWN IN MENTION ALONG THE COAST AND BAY THROUGHOUT TUESDAY AND INTO WEDNESDAY MORNING. SHOWERS AND THUNDERSTORMS WILL ALSO BE A HAZARD FOR MARINE ACTIVITY. POST-FRONTAL CONCERN WILL FOCUS ON STRONG NORTHWESTERLY WINDS THAT WILL BRING CAUTIONARY CRITERIA TO THE OUTER WATERS. && .FIRE WEATHER... RIDGE OF HIGH PRESSURE THAT HAS BEEN PARKED OVER THE AREA WILL GIVE WAY TO A FRONTAL SYSTEM PASSING THROUGH WEDNESDAY INTO THURSDAY. SHOWERS AND THUNDERSTORMS ARE EXPECTED DAILY...WITH A SIGNIFICANT RISK OF DENSE FOG. WETTING RAINS FROM THIS FRONTAL SYSTEM SHOULD LOWER ANY RISK OF FIRE WEATHER CONCERNS LATER THIS WEEK WITH ERC VALUES STRUGGLING TO STAY ABOVE 30 IN LEE...SARASOTA...AND PINELLAS COUNTIES. WILL HAVE TO KEEP AN EYE ON ANY DRYING TRENDS LATER THIS WEEK AND INTO THE WEEKEND. && .PRELIMINARY POINT TEMPS/POPS... TPA 69 78 67 77 / 50 50 40 70 FMY 69 82 67 81 / 50 50 40 40 GIF 66 80 65 78 / 50 60 40 70 SRQ 69 78 67 77 / 40 50 40 60 BKV 65 79 64 75 / 50 50 50 70 SPG 69 78 67 76 / 40 50 40 70 && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && SHORT TERM/MARINE/FIRE WEATHER...02/GARCIA LONG TERM/AVIATION...57/MCMICHAEL
Hazardous weather outlook, Dec 10, 5:11 AM EST, 12 hours 28 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 511 AM EST MON DEC 10 2012 FLZ039-042-043-048>050-GMZ850-853-870-873-101500- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS- TARPON SPRINGS TO SUWANNEE RIVER OUT 20 NM- ENGLEWOOD TO TARPON SPRINGS OUT 20 NM- TARPON SPRINGS TO SUWANNEE RIVER OUT 20 TO 60 NM- ENGLEWOOD TO TARPON SPRINGS OUT 20 TO 60 NM- 511 AM EST MON DEC 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...DENSE FOG IMPACT... WIDESPREAD DENSE FOG AND SEA FOG WILL QUICKLY REDUCE VISIBILITIES BELOW ONE-QUARTER MILE. MOTORISTS SHOULD SLOW DOWN...USE LOW BEAM HEADLIGHTS...AND MAINTAIN A SAFE FOLLOWING DISTANCE BETWEEN VEHICLES THIS MORNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. ...DENSE FOG IMPACT... AREAS OF DENSE FOG WILL AGAIN BE POSSIBLE TUESDAY NIGHT AND WEDNESDAY WITH LIGHT OVERNIGHT WINDS AND ABUNDANT LOW LEVEL MOISTURE IN PLACE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. FLZ051-052-055>057-060>062-065-GMZ830-856-876-101500- HILLSBOROUGH-POLK-MANATEE-HARDEE-HIGHLANDS-SARASOTA-DESOTO- CHARLOTTE-LEE-TAMPA BAY WATERS- BONITA BEACH TO ENGLEWOOD OUT 20 NM- BONITA BEACH TO ENGLEWOOD OUT 20 TO 60 NM- 511 AM EST MON DEC 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...DENSE FOG IMPACT... PATCHY DENSE FOG WILL QUICKLY REDUCE VISIBILITIES BELOW ONE-QUARTER MILE. MOTORISTS SHOULD SLOW DOWN...USE LOW BEAM HEADLIGHTS...AND MAINTAIN A SAFE FOLLOWING DISTANCE BETWEEN VEHICLES THIS MORNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. ...DENSE FOG IMPACT... PATCHY DENSE FOG WILL AGAIN BE POSSIBLE TUESDAY NIGHT AND WEDNESDAY MORNING WITH LIGHT OVERNIGHT WINDS AND ABUNDANT LOW LEVEL MOISTURE IN PLACE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. COLSON
In the hours before
Special weather statement, Dec 10, 5:39 PM EST, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
539 PM EST MON DEC 10 2012
FLZ050-051-102345-
HILLSBOROUGH-PINELLAS-
539 PM EST MON DEC 10 2012
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR NORTHWESTERN
HILLSBOROUGH AND PINELLAS COUNTIES FOR STRONG THUNDERSTORMS
WITH STRONG WIND GUSTS VALID UNTIL 645 PM EST...
AT 532 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES
STRONG THUNDERSTORMS LOCATED 9 MILES WEST OF INDIAN SHORES...OR 13
MILES WEST OF SEMINOLE...MOVING NORTHEAST AT 35 MPH WILL AFFECT
BELLEAIR BEACH...INDIAN ROCKS BEACH...INDIAN SHORES AND BELLEAIR.
GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED WHICH CAN CAUSE UNSECURED
OBJECTS TO BLOW AROUND...SNAP TREE LIMBS AND CAUSE POWER OUTAGES.
WHEN DRIVING THROUGH HEAVY RAIN...SLOW DOWN. ALWAYS LEAVE A SAFE
DISTANCE BETWEEN YOU AND OTHER VEHICLES.
&&
LAT...LON 2808 8285 2810 8282 2806 8279 2813 8279
2817 8285 2818 8285 2817 8231 2796 8258
2796 8266 2798 8262 2799 8267 2796 8267
2794 8271 2791 8264 2779 8280 2783 8284
TIME...MOT...LOC 2238Z 232DEG 32KT 2791 8295The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 9, 9:23 PM EST | Dense Fog Advisory | TBW | DeSoto, Hardee, Highlands, Pinellas, Polk, Sumter | 13 hr |
| Dec 9, 9:25 PM EST | Marine Dense Fog Advisory | TBW | 12 hr | |
| Dec 10, 4:39 PM EST | Special Marine Warning | TBW | 96 min | |
| Dec 10, 5:35 PM EST | Special Marine Warning | TBW | 55 min | |
| Dec 10, 6:15 PM EST | Special Marine Warning | TBW | 60 min | |
| Dec 10, 6:40 PM EST | Special Weather Statement | TBW | Pinellas | 50 min |
| Dec 10, 6:48 PM EST | Special Marine Warning | TBW | 57 min | |
| Dec 10, 6:56 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Manatee, Pinellas | 64 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.