aviation products john bravender, aviation program manager national weather service – honolulu, hi...
DESCRIPTION
Area Forecast Discussion A plain language discussion that details the forecast and provides the forecaster’s reasoning A good place to start before briefing yourself on the aviation specific products Key points to look for are the overall picture and forecast uncertainty 4:00am, 10:00am, 4:00pm, and 8:30pm HSTTRANSCRIPT
Aviation Products
John Bravender, Aviation Program Manager
National Weather Service – Honolulu, HI
[email protected](808) 973-5282
Aviation Products• Area Forecast Discussion• Terminal Aerodrome Forecasts
(TAFs)• Area Forecast• SIGnificant METeorological
Information (SIGMET)• AIRman’s METeorological Advisory
(AIRMET)• Upper Winds and Temperatures
Aloft (NCEP)
Area Forecast Discussion
A plain language discussion that details the forecast and provides the forecaster’s reasoning
A good place to start before briefing yourself on the aviation specific products
Key points to look for are the overall picture and forecast uncertainty
4:00am, 10:00am, 4:00pm, and 8:30pm HST
Area Forecast Discussion.SYNOPSIS...A TRADE WIND WEATHER PATTERN CONTINUES OVER THE FORECAST AREA
WITH CLOUDS AND SHOWERS FAVORING WINDWARD AND MOUNTAIN AREAS. TRADE WINDS WILL WEAKEN ON THURSDAY AS LOW PRESSURE AND A WEAK FRONT PASS NORTH OF THE ISLANDS. TRADES WILL STRENGTHEN ON FRIDAY AND SATURDAY BEFORE WEAKENING ONCE AGAIN AS ANOTHER LOW AND WEAK FRONT PASS NORTH OF THE ISLANDS. &&.DISCUSSION...A RIDGE OF HIGH PRESSURE REMAINS IN PLACE NORTH OF THE ISLANDS WITH THE TRADE WIND FLOW BRINGING IN CLOUDS AND SHOWERS TO WINDWARD AND MOUNTAIN AREAS OF THE ISLANDS. RAINFALL AMOUNTS THIS MORNING HAVE BEEN HIGHER COMPARED TO EARLIER IN THE WEEK AS THE TRADE WIND FLOW CONTINUES TO MOISTEN THE LOWER 8000 FEET OF THE ATMOSPHERE. THE 12Z LIHUE SOUNDING CONFIRMS THIS TREND WITH A STEADY CLIMB IN PRECIPITABLE WATER VALUES TO OVER AN INCH AND A QUARTER. OVER THE PAST 12 HOURS MOUNT WAIALEALE HAS RECEIVED .79 INCHES WITH SEVERAL OTHER WINDWARD AND MOUNTAIN GAUGES PICKING UP AMOUNTS GENERALLY A COUPLE OF TENTHS. FOR A COMPLETE LISTING OF RAINFALL AMOUNTS PLEASE CHECK OUT RRAHFO...THE HAWAII RAINFALL SUMMARY PRODUCT. &&.MARINE…A LARGE NORTHWEST SWELL CONTINUES TO PRODUCE HIGH SURF.&&.AVIATION…THERE IS AN UNUSUALLY LOW FREEZING LEVEL NEAR 10 THOUSAND FEET.&&.CLIMATE…4 STATIONS SET RECORD HIGH TEMPERATURES TODAY.
Terminal Aerodrome Forecasts
(TAFs)• Concise forecast of wind, visibility, weather, and sky condition valid for a 24 hour period– 30 hours for PHNL
• issued 4 times daily no later than 1:40am, 7:40am, 1:40pm, and 7:40pm HST
• Amendments can issued at any time to update TAFs to reflect unexpected changes
Terminal Aerodrome Forecasts
(TAFs)• PHLI Lihue • PHNL Honolulu• PHJR Kalaeloa• PHMK Molokai• PHNY Lanai• PHOG Kahului
• PHJH Kapalua• PHTO Hilo• PHKO Kona• PMDY Midway• NSTU Pago Pago
Terminal Aerodrome Forecasts
(TAFs)PHNL 101727Z 1018/1124 07007KT P6SM FEW035 SCT0
40 FM102000 08011G17KT P6SM FEW035 BKN060 FM110400 07009KT P6SM FEW035 BKN060=
PHJR 101727Z 1018/1018 VRB04KT P6SM FEW040 BKN070
FM102000 13011KT P6SM FEW035 BKN070 FM110100 08011KT P6SM FEW035 BKN070 FM110400 VRB04KT P6SM FEW035 SCT070=
Area Forecasts• An overview of weather conditions that
impact aviation operations– 12 hour detailed forecast– 6 hour flight category outlook
• A flight planning and pilot weather briefing aid for use by general aviation pilots, civil and military aviation operations, dispatchers and pilot weather briefers.
• Issued four times per day, by 5:40am, 11:40am, 5:40pm, and 11:40pm HST.
Area ForecastsCovers the main Hawaiian Islands and coastal waters out to 40 nm.
Area ForecastsSYNOPSIS...SFC HIGH FAR NW OF KAUAI MOVG NE 30 KT AND GRADUALLY STRENGTHENING. ..BIG ISLAND INTERIOR ABOVE 080. SKC. OUTLOOK...VFR. ..BIG ISLAND COAST AND LOWER SLOPES FROM UPOLU POINT TO CAPE KUMUKAHI TO APUA POINT AND ADJ WATERS.SCT030 BKN-OVC070 TOPS 090 ISOL BKN025 -SHRA. 20Z SCT030 SCT-BKN050 TOPS 080 ISOL BKN030 -SHRA. OUTLOOK...VFR. ..BIG ISLAND LOWER SLOPES FROM APUA POINT TO SOUTH CAPE TO 15NM NE PHKO. FEW050 ISOL BKN050 TOPS 080. 21Z SCT030 BKN-OVC060 TOPS 090 ISOL BKN030. OUTLOOK...VFR. . BIG ISLAND COAST AND ADJ WATERS FROM SOUTH CAPE TO 15 NM NE PHKO. SCT040 SCT-BKN060 TOPS 070 ISOL BKN040. 19Z FEW035. 22Z SCT-BKN050 TOPS 070. OUTLOOK...VFR.
Significant Meteorological Information (SIGMETs)
• To inform customers of potentially hazardous weather that is occurring or is expected to occur
• Pre-flight weather briefings
• SIGMETs will normally take precedence over all other aviation products
SIGMETsWFO Honolulu is responsible for portion of the Oakland Oceanic FIR south of 30N and west of 140W.
Significant Meteorological Information (SIGMETs)
• Thunderstorms• Severe Turbulence• Severe Icing• Volcanic Ash• Tropical Cyclones• Marked mountain waves• Widespread
sandstorm/duststorm• Radioactive Clouds
Significant Meteorological Information (SIGMETs)
WSPA10 PHFO 150755SIGPAWKZAK SIGMET WHISKEY 3 VALID 150800/151200 PHFOOAKLAND OCEANIC FIR. SEV MX ICE FCST BTN 120 AND 160 WITHIN 60 NM EITHER SIDE OF LINE N2830 W15012 - N2336 W15548. MOV E10 KT. NC. BASED ON PILOT REPORTS.
WCPA12 PHFO 151513WSTPAYKZAK SIGMET YANKEE 16 VALID 151515/152115OAKLAND OCEANIC FIR. HURCN AKA NEAR N1212 E16230 AT 1200 UTC.FRQ TS OBS BY SATELLITE WITHIN 60 NM EITHER SIDE OF LINE N1430 E16130 - N1200 E16430 - N0730 E16300. CB TOPS FL450. MOV WNW 10 KT. INTSF. OUTLOOK VALID 161200 UTC N1318 – E16042. SEE LATEST RJTD ADVISORY.
AIRman’s METeorological Advisory (AIRMETs)
• To inform customers of potentially hazardous weather that is occurring or is expected to occur
• Thresholds for issuance are lower than for SIGMETs
• Of particular concern to VFR rated pilots
AIRman’s METeorological Advisory (AIRMETs)• Moderate turbulence• Moderate icing• Sustained surface wind
speeds of 30 knots or more
• IFR conditions affecting 3,000 square miles or more
• Significant areas of mountain obscuration
AIRman’s METeorological Advisory (AIRMETs)
NO SIGNIFICANT IFR EXP.
=HNLT WA 040400AIRMET TANGO FOR TURB VALID UNTIL 041000.AIRMET TURB...KAUAI AND OAHUOVER AND IMT S THRU W OF MT.TEMPO MOD TURB BLW 090. COND CONT BEYOND 1000Z..AIRMET TURB...HIENTIRE AREA.TEMPO MOD TURB BTN FL200 AND FL250. COND CONT BEYOND 1000Z.
=HNLZ WA 040400AIRMET ZULU FOR ICE AND FZLVL VALID UNTIL 041000.NO SIGNIFICANT ICE EXP..FZLVL...120
Winds and Temperatures Aloft
Lihue, Honolulu, Lanai, Kahului, Kona, and Hilo
Issued four times daily, valid at 00, 06, 12, and 18 UTC. The bulletins are transmitted roughly 4 to 5 hours prior to the valid time
Forecasts for: 1, 1.5, 2, 3, 6, 9, and 12 thousand feet, actual
altitude 18, 24, 30, 34, 39, 45, 53 thousand feet,
pressure altitude
Winds and Temperatures Aloft FBHW31 KWNO 060730
FD1HW1DATA BASED ON 060600Z VALID 061200Z FOR USE 0800-1500Z. TEMPS NEG ABV 24000
FT 1000 1500 2000 3000 6000 9000 12000 15000 18000 24000LIH 0616 0616 0616 0714 0708+09 0608+09 3309+05 3316-01 3217-07 3122-19HNL 0719 0721 0722 0817 0906+10 9900+08 3311+06 3217-01 3221-07 3324-19LNY 0712 0809 1106+10 9900+08 3311+06 3219-01 3223-07 3325-19OGG 0810 0810 0812 0813 1108+10 9900+07 3312+05 3219-01 3224-07 3328-19KOA 9900 9900 9900 9900 9900+10 9900+08 3308+06 3318+00 3222-07 3225-19ITO 9900 9900 9900 0605 9900+09 9900+07 3309+05 3321+00 3224-07 3231-19
FBHW37 KWNO 060730 FD8HW7 DATA BASED ON 060600Z VALID 061200Z FOR USE 0800-1500Z. TEMPS NEG ABV 24000
FT 30000 34000 39000 45000 53000 LIH 323033 314344 285456 293369 062472 HNL 323733 314944 305756 293969 052272 LNY 323934 325344 306056 294569 041972 OGG 324334 325244 306256 303869 041772 KOA 324034 325544 316556 306569 021672 ITO 324534 325844 316956 304969 011672
WHERE?
www.weather.gov/hawaii/pages/aviation.php
aviationweather.gov
