# Presentation: 475055

## February 26, 2009

**February 26, 2009**

**Aviation Weather Center ****Pat Murphy WCM**

***The trusted authority and leading innovator for aviation weather information.***** **

## Mission

_***The AWC delivers***_
**consistent, timely and accurate**
**weather information**
**for the world airspace system**
_***We are a team of highly skilled people***_**dedicated to working with****customers and partners****to enhance safe and efficient flight**

## Weather for theNational Airspace System (NAS)

**AWC**
**Issues all enroute aviation forecasts**
- clouds, visibility, turbulence, icing, thunderstorms, wind
- except for terminal areas.
**Weather Forecast Offices (WFO)**
**Main source of collaborated meso scale and synoptic Wx**
**Issue TAFs**
- 24 hour forecast for approx 610 airports
**CWSU**
**Customized services for ARTCC**
**Supplements some of AWC’s forecasts**

## AWC’s Customers

**CWSUs**
**WFOs**
**FAA Air Traffic Operations**
**Flight Service Stations**
**Domestic and International Airlines, Charter, Corporate**
**Gulf of Mexico’s oil industry (helicopter operations)**
**General Aviation**
**Military**
**Worldwide users of AWC website (ADDS)**

## Forecaster Scheduled Products by NCEP Service Center by Month

## DOMESTIC OPERATIONS

## Area Forecasts (FA)

**Staffing: ****15 forecasters 24/7**
**Simulating 6 offices**
**Text-based Weather Forecasts for General Aviation Pilots.**
**Clouds (can’t say IFR)**
**Visibility (can’t say IFR)**
**Thunderstorms**
**Rain/Snow/Fog**
**Wind**
**Area of responsibility: ****CONUS and coastal waters**
- 6570 routine issues annually

**SYNOPSIS...AT 02Z LOW PRES NWRN MN WITH CDFNT BJI-PIR-DDY LN AND WRMFNT BJI-EAU-PMM LN. TROF FSD-TBE LN. BY 20Z LOW PRES CNTRL WI WITH CDFNT DLL-PWE-GLD LN AND WRMFNT DLL-ECK LN. ...DARRAH... **
**ND SCT100. OCNL BKN080 TOP FL180. ISOLD -SHRA. OTLK...VFR. . **
**SD WRN 1/3...SCT060 SCT120 TOP FL180. TIL 06-08Z OCNL CIG BKN050. WDLY SCT -SHRA/-TSRA. TS TOPS FL400. OTLK...VFR. **
**CNTRL 1/3...SCT080. OCNL BKN060. WDLY SCT -SHRA ISOLD -TSRA. TS TOPS FL400. OTLK...VFR. **
**ERN 1/3...SCT100. BY 05-07Z OCNL BKN080 TOP 160. OTLK...VFR SHRA. . **
**NE PNHNDL...AGL SCT050. TIL 04-06Z ISOLD -SHRA/-TSRA. TS TOPS FL400. OTLK...VFR. **
**CNTRL AND E...AGL SCT040 BKN080 TOPS LYRD FL180. OCNL CIG OVC030. WDLY SCT -SHRA/-TSRA. TS TOPS FL450. TS POSS SEV. **
**CNTRL BY 06-08Z SCT030 OCNL CIG BKN020. CONDS SPRDG ACRS RMNDR BY 11-13Z. OTLK...VFR. . **

## AIRMETs

**AIRMETs**

- WAUS1 KBOS 042032
- BOSS WA 042045
- AIRMET SIERRA UPDT 6 FOR IFR AND MTN OBSCN VALID UNTIL 050300
- AIRMET MTN OBSCN...ME NH VT NY PA MA MD WV VA
- FROM 70NW PQI TO MLT TO CON TO HAR TO 30NW GSO TO HMV TO HNN TO JHW TO SYR TO MSS TO YSC TO 70NW PQI
- MTNS OCNL OBSC IN CLDS/PCPN/BR. CONDS CONTG BYD 03Z THRU 09Z.

- Staffing: Same forecasters as SIGMETs/FA
- Non-thunderstorm weather not meeting SIGMET criteria
- Moderate Icing,
- Moderate Turbulence,
- Widespread Areas ofIFR i.e. Low Ceilings and Visibility,
- Mountain Obscurations
- Strong Surface Wind
- Area of responsibility: CONUS and coastal waters
**26280 routine issues annually**

## Automated Products

## ADDS Web Site

**Aviation Digital Data Service (ADDS)**
**Developed by NCAR (AWRP funding)**
**Operational 2003**
**Averaging 10 million hits per day, 100 GB per day**
_**[http://adds.AviationWeather.gov](http://adds.aviationweather.gov/)**_

## Graphical AIRMETG-AIRMET

**G-AIRMET contains information related to the occurrence or expected occurrence of en-route weather phenomenon, which may affect safety of aircraft**
**Issued at 03:00, 09:00, 15:00, and 21:00 UTC**
**Updates (e.g., amendments) issued as necessary**
**G-AIRMET provided in Binary Universal Format Record (BUFR) format via NWS operation**
**Digital format intended for integration into customer and partners’ systems**
**Basic display interface on AviationWeather.gov**

## G-AIRMET Elements

| Element | G-AIRMET |
| --- | --- |
| Turbulence
(non-convective) | Moderate Turbulence
Surface to 45,000 feet |
| Sustained Surface Winds |  ≥ 30 knots |
| Low Level Wind Shear
(non-convective) | Wind shear (+/- 10 knots) below 2000 feet AGL |
| Surface Visibility | ≤ 3 miles(IFR) |
| Cause of Surface Visibility restriction | Precipitation (PCPN), Mist (BR), Fog (FG), Haze (HZ), Smoke (FU), Blowing Snow (BLSN) |
| Low Ceilings | Ceiling ≤ 1000 feet (IFR) |

**G-AIRMET Elements**

**Some overlap with WFO and CWSU products**

## G-AIRMET Elements (Cont.)

| Element | G-AIRMET |
| --- | --- |
| Icing
(non-convective) | Moderate Airframe Icing
Surface to 45,000 feet |
| Freezing Level | Location of the freezing level at the Surface, 4,000, 8,000, 12,000, and 16,0000 feet |
| Multiple Freezing Levels | Area and vertical range |
| Mountain Obscuration | Area |
| Cause of Mountain Obscuration | Clouds (CLDS), Precipitation (PCPN), 
Mist (BR), Fog (FG), Haze (HZ), Smoke (FU) |
| SIGMETs | Included in depiction but not provided as part of the G-AIRMET/GFA BUFR message |

**G-AIRMET Elements (Cont.)**

## G-AIRMET

**Intended to be displayed as a graphic**
**Not a text message converted to a graphic**
**Data intended to be integrated into display systems**
**Not a “picture”**
**Identification of weather hazard**
**Use Lat/Long instead of VORs**
**Uses many more points to describe with more precision**
**Quality of information**
**More precision in time and space**
**More information than text can carry**
**Tiny communication costs**

## AIRMET and G-AIRMET

**The text AIRMET is a product of the ****G-AIRMET**
**AIRMET and G-AIRMET fully consistent**
**The AIRMET contains less precision**
**Advisory for a period of up to 6 hours**
- a time “smear”
**The text AIRMET is limited by number of characters**
**Uses VORs to describe extent of hazard over a period of time.**

## G-AIRMET

## G-AIRMET

- Note: WFO and CWSU collaboration opportunities

## Collaboration AWC-WFO-CWSU

**All three have unique as well as overlapping Aviation Weather responsibility**
**WFO 5mi radius – **
**Approach/Departure**
**Flight Planning**
**AWC **
**Approach/Departure for all that is not a 5 mi circle**
**Flight Planning**
**CWSU**
**TRACON – crucial**
- “bridge” between TAF and En-Route forecast

## Collaboration Opportunities

**FAA Continually states “weather information consistency is favored over accuracy”. **
**WFO NDFD grids**
**Use for FA production**
- Winds
- Wind gusts
- Cloud cover
- Weather
**Use for TAF production**
**National Ceiling and Visibility **
**Use as first guess or guidance for a GFE/NDFD grid population?**

## Area Forecast

**FAUS43 KKCI **
**261045 FA3W **
**CHIC FA 261045 **
**SYNOPSIS AND VFR CLDS/WX SYNOPSIS VALID UNTIL 270500 **
**CLDS/WX VALID UNTIL 262300...OTLK VALID 262300-270500**
** ****ND SD NE KS MN IA MO WI LM LS MI LH IL IN KY . **
**SEE AIRMET SIERRA FOR IFR CONDS AND MTN OBSCN. TS IMPLY **
**SEV OR GTR TURB SEV ICE LLWS AND IFR CONDS. NON MSL **
**HGTSDENOTED BY AGL OR CIG. **
**.SYNOPSIS...UPR LVL DISTURBANCE NRN KS-NRN IN FCST 05Z SRN **
**GRTLKS RGN. HIGH PRES THRUT SFC FCST LTL CHANGE THRU PD. **
**. ND SKC OR SCT CI. OTLK...VFR. . **
**.SD..**
**   ****N 1/3...BKN120 LYRD FL250. OTLK...VFR.**
**   ****S 2/3...BKN040-045 TOP FL250. VIS 3-5SM -SN BR. BECMG 1719 **
**   ****SCT050 BKN100-120. ERN PTNS OCNL VIS 3-5SM -SN BR.**
**   ****OTLK...VFR THRUT. **
**. NE..**
**  ****W HLF...OVC040-045 TOP 150 BKN CI. VIS 3-5SM -SN BR.**
**  ****OTLK...MVFR CIG SN. **
**  ****E HLF...SCT-BKN035 OVC050-070 TOP 150 BKN CI. OCNL VIS 3-5SM **
**  ****-SN BR. OTLK...MVFR CIG SN. . **
**KS.. **
** ****E HLF...BKN030 OVC050 TOP 160. BKN CI. 15Z OVC025. OCNL VIS **
** ****3-5SM -FZDZ/-SN BR. OTLK...MVFR CIG SN. **
** ****NW...OVC040-050 TOP 150. SCT-BKN CI. VIS 3-5SM -SN BR.**
**  ****OTLK...IFR CIG SN. **
** ****SW...SCT040. BECMG 1213 OVC040 TOP 150. AFT 17Z OCNL VIS **
**  ****3-5SM - SN BR. OTLK...MVFR CIG SN BR.**
**. MN..**
**   ****N HLF...SKC OCNL SCT CI. OTLK...VFR. **
**   ****S HLF...SCT-BKN CI. BECMG 1516 SCT-BKN120 LYRD FL250.**
**    ****OTLK...VFR. .**
** ****.IA..**
**   ****W 1/3...SCT-BKN035 OVC060 LYRD FL250. VIS 3-5SM -SN BR. AFT**
**   ****17Z OVC020-025. OTLK...MVFR CIG. **

**3860 Characters**
- Basic formatting takes 60%
**Can’t mention “IFR”**
**Difficult to brief with**
**Going to a “Graphical FA”**
- NextGen Component
- Consistent with other NWS forecasts
- Utilize NDFD

## Collaboration NCV

- 5km resolution

- 20-40km resolution

## Collaboration

- Hourly or 3-hourly availability needed to utilize coordination/consistency with AWC

## Questions?

## Gulf of Mexico Area Forecasts

**Gulf of Mexico Area Forecasts**

**Staffing: ****Same five forecasters as Oceanic SIGMETs**
**Weather Forecasts primarily for Helicopter Operations**
**Clouds**
**Visibility**
**Thunderstorms**
**Rain/Fog**
**Wind**
**4,000 Operating Oil Platforms**
**30,000 personnel living on oil platforms**
**600 Helicopters**
**1.3 Million flights annually**

## AWC’s Area of Responsibility for Aviation Warnings (SIGMETs)

## Convective SIGMET

**SIGMET for thunderstorms**
**“****Warning” Product**
**Associated Hazards:****Turbulence, Icing, & Wind Shear **
**CONUS and coastal waters**
**Issued Hourly / Valid for 2 hrs**
- ~ 30,000** issued annually**

**Convective SIGMET**

- WSUS41 KMKC 041856
- WSTC
- SIGMET CONVECTIVE SIGMET 85C
- VALID UNTIL 2055Z
- TX OK
- FROM 60SE GAG-50WSW SPS-60NE JCT-50SSE DLF INTSF LINE SEV TS 40 NM WIDE MOV FROM 25045KT. TOPS ABV FL450. TORNADOES...HAIL TO 2 IN...WIND GUSTS TO 80KT POSS.
- OUTLOOK VALID 042055-050055
- FROM ORD-FWA-LOU-SGF-LIT-LCH-LRD-50E DLF-30W ADM-GAG-OVR-ORD REF WW 22 23.
- WST ISSUANCES EXPD.

## Collaborative Convective Forecast Product (CCFP)

** ****5 GS-13 Forecasters**
**Strategic traffic flow management**
**Collaborators:**
**FAA**
**Meteorologists at CWSUs, Airlines, and AWC**
**MSC**
- ~ 25,000 **Forecast Polygons annually**

## Significant Weather Forecasts

- 8 GS-13 Forecasters
- Covers FL250 - FL630
- Worldwide forecast
- 	24 hour forecasts
- 	Jet Streams
- 	Thunderstorms
- 	Turbulence
- 	Tropopause Heights
- 	Active Volcanoes
- 	Tropical Cyclones
- 18,980 routine issuances/yr *

## Oceanic SIGMETs

- 5 GS-13 Forecasters
- Thunderstorms
- Tropical Cyclones (Hurricanes)
- Severe Icing & Turbulence
- Dust Storms & Sandstorms
- Volcanic Ash

**WSNT10 KKCI 051409**
**SIGA0J**
**TJZS SIGMET JULIETT 1 VALID 051405/052005 KKCI- SAN JUAN FIR VOLCANIC ASH FROM SOUFRIERE HILLS WI 20 NM EITHER SIDE OF LINE 1618N06300W 1550N06345W. TOPS TO FL070. ASH MOV SW 25KT. NC. BASED ON SATELLITE OBS AND LATEST ADVSRY. OUTLOOK 06/0205..NC. **