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Localized Aviation MOS Program

LAMP Announcement

January 19, 2006

 

Attention LAMP users:

The LAMP system, which currently provides an update to the NGM MOS guidance, is currently being redeveloped to update the more modern GFS MOS guidance. Beginning on or around January 23, 2006, the web site http://weather.gov/mdl/lamp will contain information about the new GFS-LAMP system. At this site, you will be able to find experimental guidance from the redeveloped system, in addition to technical information about the new system. This web site is experimental, contains experimental products, and is not supported 24x7. However, as with the current NGM-based LAMP system, please contact us if you notice that the data are old, and we will try to rectify the situation as soon as we can.

As of January 2006, one GFS LAMP cycle is nearing completion, and that is the 0900 UTC cycle. Our next cycle will be 2100 UTC, and will be available on this web site in an experimental mode in Spring 2006.

For more details about the new system, please visit our web site.

Key differences between the NGM-based LAMP system and the GFS-based LAMP system are summarized below:

 

Current (NGM-based) LAMP

New (GFS-based) LAMP

Updates

NGM MOS

GFS MOS

Runs

Locally in AWIPS

Centrally on NCEP computers

Distribution

Within AWIPS, NWS ftp server, experimentally on web

Across NOAAport, SBN, NWS ftp server experimentally on web, received in AWIPS and at NWS National Centers

Cycles

Every 3 hours

Every hour (planned)

Projections

Hourly out 20 hours

Hourly out 25 hours

Coverage

CONUS

CONUS, Alaska, Hawaii, Puerto Rico (Thunderstorm guidance available over CONUS only)

Stations

~ 1000 stations

> 1500 Stations

Key differences between the NGM-based LAMP forecast elements and the GFS-based LAMP forecast elements are summarized below:

Element

Current (NGM-based) LAMP

New (GFS -based) LAMP

Temperature

Yes

Planned

Dewpoint

Yes

Planned

Wind Direction

Yes

Planned

Wind Speed

Yes

Planned

Wind Gusts

No

Planned

Probability of Precipitation Occurring on the Hour

Yes

Planned

Best Category (yes/no) for Occurrence of precipitation on the Hour

Yes

Planned

Probability of Precipitation Occurring in a 6-h period

Yes

Planned

Probability of Precipitation Occurring in a 12-h period

Yes

Planned

Probability of Thunderstorm Occurring in a 20-km gridbox in a 2-h period

No

Planned

Best Category (yes/no) for Occurrence of thunderstorm in a 20-km gridbox in a 2-h period

No

Planned

Precipitation Type

Yes

Planned

Precipitation Characteristics

No

Planned

Sky Cover

Yes

Planned

Ceiling Height

Yes

Planned

Conditional Ceiling Height

No

Planned

Visibility

Yes

Planned

Conditional Visibility

No

Planned

Obstruction to Vision

Yes

Planned

Quantitative Precipitation Forecast

Yes

Not Planned

Cloud Layers

Yes

Not Planned

Text and graphical guidance for the 0900 UTC cycle for the above GFS-LAMP elements will be available on the web site starting on or about January 23, 2006, with the following exceptions: Probability of thunderstorms, best category of thunderstorms occurring, precipitation type, and conditional ceiling height. Guidance for these elements will be available on the web site as soon as they are thoroughly tested. In addition, probability of precipitation in a 12-hour period and precipitation characteristics will be available only via the BUFR formatted data. They will not be available in a text format.

The NGM-based LAMP guidance will continue to be available on the web site until such time that the product is no longer an operational product in AWIPS.

Thank you for your interest in LAMP.

Judy Ghirardelli

NWS/OST/MDL/LAMP


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Page Last Modified: September 05, 2007. 16:45  UTC