Alert archive / Florida / Special Weather Statements in 2009
Special Weather Statement, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this special weather statement at Jun 17, 2009, 4:21 PM EDT for Hernando County, Florida. It was in force for 24 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
- Jun 17, 2009, 4:21 PM EDT (20:21 UTC)
- Expired
- Jun 17, 2009, 4:45 PM EDT
- In force
- 24 min
- Issued by
- NWS Tampa Bay, FL
County Hernando County, FL
The radar
The Tampa radar (KTBW), 104 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 223 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
- 3004 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 605 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
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 Jun 17, 1:17 PM EDT, 3 hours 4 minutes earlier.
Area forecast discussion, Jun 17, 1:17 PM EDT, 3 hours 4 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 117 PM EDT WED JUN 17 2009 .SYNOPSIS...AREA IS ON THE EAST SIDE OF A HIGH CENTER OVER THE NORTHERN GULF COAST...WITH A WEAK PRESSURE GRADIENT ACROSS THE PENINSULA. LIKEWISE...ALOFT HAVE RIDGING TO OUR WEST...WITH OUR REGION MOVING INTO SOME DRIER AIR. && .SHORT TERM (TONIGHT-FRIDAY)...THE AIR IS NOT TOO DRY FOR STORM DEVELOPMENT...AND EXPECT ISOLATED TO SCATTERED STORMS THROUGH THIS EVENING. PATTERN DOESNT CHANGE MUCH THURSDAY OR FRIDAY...THOUGH THE UPPER RIDGE WILL MOVE INTO POSITION OVER THE DEEP SOUTH. THIS PATTERN SHIFT SHOULD MEAN SOME MORE DRY MID LEVEL AIR AND SINKING...ESPECIALLY OVER THE NORTHERN CWA...CLOSER TO THE HIGH CENTER. STILL SHOULD BE ENOUGH MOISTURE FOR ISOLATED TO SCATTERED STORMS EACH DAY AS TEMPERATURES CONTINUE ABOVE NORMAL. .LONG TERM (FRIDAY NIGHT-WEDNESDAY)...STRONG UPPER RIDGE OVER THE LOWER MISSISSIPPI VALLEY/NORTHERN GULF REGION WILL HOLD FIRM THROUGH SATURDAY THEN WILL WEAKEN SOME AND RETROGRADE WEST SUNDAY THROUGH EARLY NEXT WEEK AS A LONG WAVE TROUGH DEVELOPS OVER THE EASTERN SEABOARD. SURFACE RIDGE AXIS INITIALLY ACROSS THE CENTRAL PENINSULA WILL SINK SOUTH IN RESPONSE TO THE DEVELOPING UPPER TROUGH WITH THE AXIS SETTING UP SHOP ACROSS THE SOUTHERN PENINSULA AND FLORIDA STRAITS THROUGH THE PERIOD. ISOLATED TO SCATTERED SHOWERS AND STORMS (POPS 20-30% RANGE) ARE EXPECTED ALONG THE SEA BREEZE CIRCULATIONS DURING SATURDAY AND SUNDAY WITH A WESTERLY STEERING FLOW FAVORING BEST COVERAGE OF SHOWERS/STORMS OVER INLAND SECTIONS DURING THE AFTERNOON AND EARLY EVENING HOURS. DURING MONDAY THROUGH WEDNESDAY THE AFOREMENTIONED DEVELOPING UPPER TROUGH COMBINED WITH AMPLE MOISTURE...WEAK VORT LOBES MOVING SOUTHEAST ACROSS THE REGION WITHIN THE DEVELOPING CYCLONIC NORTHWEST FLOW ALOFT...THE SEA BREEZE CIRCULATIONS AND A BACK-DOOR TYPE FRONT SAGGING SOUTH WILL ALL LEAD TO INCREASING RAIN CHANCES OVER THE FORECAST AREA. ENSEMBLE POPS LOOK A BIT LOW GIVEN THE ABOVE MENTIONED FEATURES...SO WILL DEPICT POPS IN THE 40-60% RANGE COAST TO INLAND LOCATIONS DURING THIS TIME FRAME. ONSHORE FLOW WILL CONTINUE TO FAVOR SHOWERS/STORMS ALONG THE COAST DURING THE LATE NIGHT AND EARLY MORNING HOURS WITH THE CONVECTION SHIFTING TOWARD INLAND LOCATIONS EACH AFTERNOON. ABOVE NORMAL TEMPERATURES ARE EXPECTED THROUGH THE WEEKEND BEFORE RETURNING TO NEAR NORMAL LEVELS EARLY NEXT WEEK AS THE RAIN CHANCES INCREASE. ON A SIDE NOTE THE LATEST GFS SHOWS DRIER AIR BEING DRAWN SOUTH INTO THE REGION DURING TUESDAY/WEDNESDAY AS THE EAST COAST TROUGH AMPLIFIES WITH SOME SORT OF WEAK SURFACE LOW DEVELOPMENT OFF THE SOUTHWEST FLORIDA COAST ALONG THE TAIL END OF THE BACK-DOOR FRONT. 00Z/06Z GFS AND 00Z ECMWF RUNS DID NOT SHOW THIS DRIER AIR OR LOW DEVELOPMENT...SO FOR THE TIME BEING WILL ERR ON THE SIDE OF CAUTION WITH RESPECT TO THIS SOLUTION AND KEEP ABOVE NORMAL POPS IN PLACE AND WAIT TO SEE WHAT FUTURE MODEL RUNS SHOW OVER THE NEXT FEW DAYS. && .AVIATION...SCATTERED SHOWERS AND THUNDERSTORMS MAY PRODUCE BRIEF TEMPO MVFR/IFR CEILINGS AND VISIBILITIES AT THE TERMINAL SITES THROUGH 18/03Z THIS EVENING...THEN VFR CONDITIONS ARE EXPECTED OVERNIGHT. ADDITIONAL BRIEF MVFR/IFR CIGS/VSBYS WILL AGAIN BE POSSIBLE LATE MORNING THROUGH THE AFTERNOON ON THURSDAY AS SHOWERS AND THUNDERSTORMS REDEVELOP ACROSS THE REGION. && .MARINE...EXPECT ISOLATED STORMS LATER THIS AFTERNOON AND EVENING NEAR THE COAST AND THEN AGAIN TOMORROW LATE AFTERNOON. OTHERWISE WEATHER IS FAIRLY TRANQUIL FOR BOATING. && .FIRE WEATHER...NO CONCERNS. && .PRELIMINARY POINT TEMPS/POPS... TPA 77 93 77 92 / 30 30 20 20 FMY 75 94 74 94 / 30 40 20 30 GIF 75 95 75 95 / 30 40 20 30 SRQ 75 92 74 91 / 30 20 20 20 BKV 70 93 70 94 / 20 30 20 20 SPG 80 93 80 92 / 20 30 20 20 && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && SHORT TERM/MARINE/FIRE WEATHER...55/SHARP LONG TERM/AVIATION...57/MCMICHAEL
Hazardous weather outlook, Jun 17, 5:04 AM EDT, 11 hours 17 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 504 AM EDT WED JUN 17 2009 FLZ039-042-043-048>052-055>057-060>062-065-172115- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 504 AM EDT WED JUN 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... SHOWERS AND THUNDERSTORMS WILL BEGIN IN THE LATE MORNING OR EARLY AFTERNOON AND THEN CONTINUE THROUGH THE EVENING...SCATTERED ACROSS INLAND AREAS BUT ISOLATED ALONG IMMEDIATE COASTAL LOCATIONS. THE MAIN THREATS WILL BE FREQUENT LIGHTNING...GUSTY WINDS AND HEAVY BUT BRIEF RAINFALL. ...EXCESSIVE HEAT IMPACT... TEMPERATURES WILL RISE QUICKLY INTO THE MID 90S BY MID AFTERNOON WITH HEAT INDICES OF 100 TO 105 IN SCATTERED LOCATIONS AWAY FROM THE GULF. DRINK PLENTY OF WATER...BEFORE YOU GET THIRSTY. WEAR LIGHTWEIGHT AND LIGHT COLORED CLOTHING. RESERVE STRENUOUS EXERCISE FOR EARLY MORNING OR EVENING HOURS. STAY NEAR AIR CONDITIONED LOCATIONS IF POSSIBLE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. ...THUNDERSTORM IMPACT... ISOLATED TO SCATTERED THUNDERSTORMS...IN THE AFTERNOONS AND EARLY EARLY EVENINGS...WILL CONTINUE THROUGH MONDAY AND THEN INCREASE TO SCATTERED TO NUMEROUS TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. 09/RKR
In the hours before
Special weather statement, Jun 17, 3:28 PM EDT, 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 328 PM EDT WED JUN 17 2009 FLZ048-172000- HERNANDO- 328 PM EDT WED JUN 17 2009 ...STRONG THUNDERSTORMS WILL AFFECT WESTERN HERNANDO COUNTY... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES A THUNDERSTORM... MOVING SOUTHWEST AT 5 MPH...WILL AFFECT WEEKI WACHEE...UNTIL 400 PM EDT. GUSTY WINDS UP TO 50 MPH MAY CAUSE LOOSE OBJECTS TO BLOW AROUND. SOME DAMAGE TO TREE LIMBS AND WIRES IS POSSIBLE. FREQUENT LIGHTNING IS EXPECTED. TO BE SAFE GO INDOORS IMMEDIATELY IF CAUGHT OUTSIDE...FIND A LOW SPOT...AND STAY AWAY FROM TALL OBJECTS. THIS STORM WILL PRODUCE PEA SIZE HAIL. TORRENTIAL RAINS WILL REDUCE VISIBILITY TO NEAR ZERO AND WILL CAUSE PONDING OF WATER ON ROADWAYS. LAT...LON 2846 8256 2863 8264 2868 8251 2858 8238 TIME...MOT...LOC 1929Z 042DEG 6KT 2858 8253
Special weather statement, Jun 17, 4:21 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 421 PM EDT WED JUN 17 2009 FLZ048-172045- HERNANDO- 421 PM EDT WED JUN 17 2009 ...STRONG THUNDERSTORMS WILL AFFECT NORTHERN HERNANDO COUNTY... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES A THUNDERSTORM STATIONARY...WILL AFFECT RURAL NORTHERN HERNANDO COUNTY AND RURAL NORTHWESTERN HERNANDO COUNTY...UNTIL 445 PM EDT. GUSTY WINDS UP TO 40 MPH MAY CAUSE LOOSE OBJECTS TO BLOW AROUND. SOME DAMAGE TO TREE LIMBS AND WIRES IS POSSIBLE. FREQUENT LIGHTNING IS EXPECTED. TO BE SAFE GO INDOORS IMMEDIATELY IF CAUGHT OUTSIDE...FIND A LOW SPOT...AND STAY AWAY FROM TALL OBJECTS. THIS STORM WILL PRODUCE PEA SIZE HAIL. TORRENTIAL RAINS WILL REDUCE VISIBILITY TO NEAR ZERO AND WILL CAUSE PONDING OF WATER ON ROADWAYS. LAT...LON 2869 8262 2869 8243 2855 8243 2854 8261 TIME...MOT...LOC 2021Z 175DEG 1KT 2862 8253
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 8:20 PM EDT | Special Weather Statement | TBW | DeSoto, Hardee, Highlands, Polk, Sumter | 70 min |
| Jun 16, 9:27 PM EDT | Special Weather Statement | TBW | DeSoto, Hardee, Highlands, Polk | 48 min |
| Jun 16, 11:14 PM EDT | Special Weather Statement | TBW | Charlotte, Lee | 61 min |
| Jun 16, 11:17 PM EDT | Special Marine Warning | TBW | 43 min | |
| Jun 17, 3:28 PM EDT | Special Weather Statement | TBW | Hernando | 32 min |
| Jun 17, 4:42 PM EDT | Special Weather Statement | TBW | Levy | 33 min |
| Jun 17, 4:53 PM EDT | Special Weather Statement | TBW | Hillsborough | 52 min |
| Jun 17, 5:13 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 47 min |
| Jun 17, 5:27 PM EDT | Severe Thunderstorm Warning | TBW | Levy | 33 min |
| Jun 17, 5:38 PM EDT | Special Marine Warning | TBW | 52 min | |
| Jun 17, 5:56 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 34 min |
| Jun 17, 6:30 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough, Pasco | 30 min |
| Jun 17, 6:49 PM EDT | Special Marine Warning | TBW | 41 min | |
| Jun 17, 6:56 PM EDT | Severe Thunderstorm Warning | TBW | DeSoto, Hardee | 18 min |
| Jun 17, 7:23 PM EDT | Severe Thunderstorm Warning | TBW | Hernando, Pasco | 37 min |
Nearby
Special Weather Statements in Florida, 2009Every special weather statement in 2009
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.