2010 February

UPDATE: This change has been postponed until March 03, 2010 per amended TIN 09-39.

LAMP Change Notice

FRIDAY JANUARY 22, 2010

Attention LAMP users:

Effective on Tuesday, Februrary 9, 2010, GFS-MOS will remove 19 stations from their guidance (TIN 09-39). This change will impact GFS-LAMP. As a result, beginning at 1600 UTC on February 9, 2010, LAMP will no longer provide text bulletin (AWIPS ID: LAV) or BUFR guidance for the following 18 stations:

K4BK     BROOKINGS               OR    N42.0500 W124.2833
K87Q     SAN SIMEON (AMOS)       CA    N35.6667 W121.2833
KCGX     MEIGS APRT              IL    N41.8667 W087.6167
KCQV     COLVILLE MUNICIPAL      WA    N48.5500 W117.8833
KGFA     MALMSTROM AFB           MT    N47.5047 W111.1873
KIIY     WASHINGTON-WILKES AP    GA    N33.7800 W082.8200
KILL     WILLMAR (AWOS)          MN    N45.1167 W095.0833
KMCC     MCCLELLAN AFB           CA    N38.6667 W121.4000
KMLD     MALAD CITY              ID    N42.1667 W112.3167
KMQT     MARQUETTE               MI    N46.5333 W087.5500
KNEL     LAKEHURST NAS           NJ    N40.0333 W074.3536
KNQX     KEY WEST NAS            FL    N24.5757 W081.6888
KP38     CALIENTE      ASOS      NV    N37.6167 W114.5167
KP75     SEUL CHOIX (AMOS)       MI    N45.9167 W086.2300
KPLB     PLATTSBURGH-CLINTON     NY    N44.6822 W073.5278
KUCA     UTICA                   NY    N43.1436 W075.3844
KXVW     VANDENBERG RANGE        CA    N34.7200 W120.5700
PAVW     VALDEZ                  AK    N61.1333 W146.3500

In addition, the call letters for the following stations will be modified:

    Blakely, GA             from K11J to KBIJ
    Winner Wiley Field, SD  from KSFD to KICR
    Huslia, AK              from PAHS to PAHL

As a result of changes to the GFS MOS guidance, LAMP precipitation type guidance will now be available for all CONUS stations. This will result in 3 extra lines of precipitation type guidance in the text bulletins of CONUS stations that did not previously have such guidance. In addition, the availability of guidance for some other LAMP elements will be altered as a result of their corresponding availability in GFS MOS. This will slightly alter the format of some of the text bulletins. Please see the link below for an example of how the LAV output will be changing:

lmp_lavtxt_t12z.diff.txt

The specific GFS-LAMP BUFR and Text Product headers affected by the station removal are listed below:

GFS-LAMP Text Product :  FOUS11 KWNO    LAVUSA
GFS-LAMP BUFR Products:  JSMF10 KWNO
                         JSMF11 KWNO
                         JSMF12 KWNO
                         JSMF13 KWNO
                         JSMF14 KWNO
                         JSMF15 KWNO
                         JSMF16 KWNO
                         JSMF17 KWNO

To view the GFS-MOS TIN 09-39 detailing the change referenced above, see https://www.nws.noaa.gov/os/notification/tin09-39gfs_mos.txt

Please let us know if you have any questions.

Thank you for your interest in LAMP.

Scott Scallion

NWS/OST/MDL/LAMP

2009 October

K4BK     BROOKINGS               OR    N42.0500 W124.2833
K87Q     SAN SIMEON (AMOS)       CA    N35.6667 W121.2833
KCGX     MEIGS APRT              IL    N41.8667 W087.6167
KCQV     COLVILLE MUNICIPAL      WA    N48.5500 W117.8833
KGFA     MALMSTROM AFB           MT    N47.5047 W111.1873
KIIY     WASHINGTON-WILKES AP    GA    N33.7800 W082.8200
KILL     WILLMAR (AWOS)          MN    N45.1167 W095.0833
KMCC     MCCLELLAN AFB           CA    N38.6667 W121.4000
KMLD     MALAD CITY              ID    N42.1667 W112.3167
KMQT     MARQUETTE               MI    N46.5333 W087.5500
KNEL     LAKEHURST NAS           NJ    N40.0333 W074.3536
KNQX     KEY WEST NAS            FL    N24.5757 W081.6888
KP38     CALIENTE      ASOS      NV    N37.6167 W114.5167
KP75     SEUL CHOIX (AMOS)       MI    N45.9167 W086.2300
KPLB     PLATTSBURGH-CLINTON     NY    N44.6822 W073.5278
KUCA     UTICA                   NY    N43.1436 W075.3844
KXVW     VANDENBERG RANGE        CA    N34.7200 W120.5700
PAVW     VALDEZ                  AK    N61.1333 W146.3500

    Blakely, GA             from K11J to KBIJ
    Winner Wiley Field, SD  from KSFD to KICR
    Huslia, AK              from PAHS to PAHL

GFS-LAMP Text Product :  FOUS11 KWNO    LAVUSA
GFS-LAMP BUFR Products:  JSMF10 KWNO
                         JSMF11 KWNO
                         JSMF12 KWNO
                         JSMF13 KWNO
                         JSMF14 KWNO
                         JSMF15 KWNO
                         JSMF16 KWNO
                         JSMF17 KWNO

2009 February

LAMP Announcement

February 10, 2009

TUESDAY FEBRUARY 10, 2009

LAMP Users,

On or about February 10, 2009 a new graphic will be available on the LAMP web page. The graphic shows LAMP probability forecasts and associated thresholds for the aviation elements of:

• Ceiling height
• Conditional ceiling height (conditional on precipitation occurring)
• Visibility
• Conditional visibility (conditional on precipitation occurring)
• Probability of Precipitation on the Hour
• Probability of Freezing
• Probability of Freezing or Snow

This information is available for all LAMP stations, and all LAMP cycles. The precipitation type information is available on the "Uncertainty Plot" tab.

The intent of this web page is to allow users to easily see the probabilities for critical aviation categories and elements, and to see how they relate to their associated thresholds which together determine the best category selected in LAMP.

The web page is available from the main LAMP Products Page under "Probability Plots":
https://vlab.ncep.noaa.gov/web/mdl/lamp.

or directly from :

http://weather.gov/mdl/gfslamp/uncertform.php. *

Documentation explaining what is offered on the page can be found at:

http://weather.gov/mdl/gfslamp/docs/uncertplots_info.shtml. *

and a powerpoint presentation "tutorial" explaining this in more detail can be found at:

uncert_help.ppt (ppt) 

We hope that you might find this information useful. Please let us know if you have any questions or comments.

Judy Ghirardelli, Scott Scallion, and the LAMP Team
NWS/OST/NWS/MDL/LAMP

2007 September

LAMP Change Notice

WEDNESDAY JUNE 20, 2007

Attention LAMP users:

Effective on Tuesday, September 11, 2007 new stations will be added to certain elements of the GFS-MOS (TIN 07-42). This change will impact GFS-LAMP, on that same date, in the following ways:

GFS-LAMP will begin producing precipitation characteristics guidance for 144 additional stations for the cycles of 0300, 0900, 1500, and 2100 UTC.

GFS-LAMP will begin producing precipitation characteristics guidance for 213 additional stations for the cycles of 0000, 0600, 1200, and 1800 UTC.

GFS-LAMP will begin producing visibility, obstruction to vision, and conditional visibility guidance for 69 additional stations for the cycles of 0000, 0600, 1200, and 1800 UTC.

The additions to precipitation characteristics will only impact the GFS-LAMP BUFR Product. The changes in visibility, obstruction to visibility, and conditional visibility will add lines to the GFS-LAMP text bulletin for the affected cycles in addition to adding guidance for these stations in the GFS-LAMP BUFR Product. See below for the specific GFS-LAMP BUFR and Text Product headers that will be affected by this change.

GFS-LAMP Text Product :  FOUS11 KWNO    LAVUSA
GFS-LAMP BUFR Products:  JSMF11 KWNO
                         JSMF12 KWNO
                         JSMF13 KWNO
                         JSMF14 KWNO
                         JSMF15 KWNO
                         JSMF16 KWNO
                         JSMF17 KWNO

To view the GFS-MOS TIN 07-42 detailing the change referenced above, see https://www.nws.noaa.gov/om/notif.htm.

To view a table detailing the new stations and how their guidance will change, see https://www.weather.gov/mdl/lamp_CN_06202007.tbl.

Please let us know if you have any questions.

Thank you for your interest in LAMP.

Scott Scallion

NWS/OST/MDL/LAMP

2006 August 28

LAMP Change Notice

MONDAY AUGUST 24, 2006

Attention LAMP users:

Effective on Monday, August 28, 2006 the GFS-LAMP guidance meteograms will be replaced with a new format. The JAVA Virtual Machine will be utilized to allow the user to customize the meteograms to their own preferences. Previous and verified forecasts along with Thunderstorm guidance will be represented on the new meteograms. Text bulletins for the corresponding station will also be able to be viewed from the new page. See an example screenshot below.



To access the meteograms once they become available please see https://www.nws.noaa.gov/mdl/gfslamp/meteoform.php. *

To access the meteograms for a specific site, the link below can be used. Substitute the station's call letters for STATION.
https://www.nws.noaa.gov/mdl/gfslamp/meteodata.php?BackHour=0&sta=STATION
&TempBox=Y&DewBox=Y&SkyBox=Y&WindSpdBox=Y&WindGustBox=Y
&WindDirBox=Y&CigBox=Y&VisBox=Y&ObvBox=Y&PopoBox=Y&TStormBox=Y&PtypeBox=Y *

Please let us know if you have any questions.

Thank you for your interest in LAMP.

Jeremy Schulz

NWS/OST/MDL/LAMP

2006 August 23

LAMP Change Notice

TUESDAY AUGUST 22, 2006

Attention LAMP users:

Effective August 23, 2006, a modification to the GFS-LAMP guidance for precipitation characteristics in BUFR format will be implemented. This modification is necessary to correctly reclassify the categories of the GFS LAMP precipitation characteristics guidance (drizzle, continuous, and showers) in BUFR format to be consistent with the BUFR definitions of this element.

Prior to this fix, the GFS LAMP precipitation characteristics in BUFR format were being categorized as:

1 = showers
2 = drizzle
3 = continuous

However, the correct definition for these categories of precipitation characteristics in BUFR format are:

1 = drizzle
2 = continuous
3 = showers

as specified in our documentation https://www.weather.gov/mdl/media/mdl/BufrLAMPCategory05.pdf (pdf).

If you have been using this BUFR field, and interpreting the categories as the documentation indicates, note that they were misaligned and not what they were documented to be. For example, if the guidance indicated "1" for a station, the documentation indicates that is drizzle, but the actual LAMP forecast was for showers. The LAMP software should have mapped the "1" to a "3" which would have correctly indicated showers according to the documentation.

Effective with the 2100 UTC cycle on August 23, 2006, the software will be modified to fix these categorizations so that they are consistent with the BUFR documentation. This web site will be updated to indicate the cycle with which the change takes place once that information is known.

This only affects the GFS LAMP BUFR product, and only the BUFR descriptor element of 0 60 092 Conditional Precipitation Forecast (categories)

We apologize for any inconvenience this might have caused. Please let us know if you see any problems or have any questions.

Thank you for your interest in LAMP.

Judy Ghirardelli

NWS/OST/MDL/LAMP

2006 August 8

LAMP Change Notice

WEDNESDAY AUGUST 09, 2006

Attention LAMP users:

Effective on August 8, 2006 the GFS-LAMP guidance became available on the NWS FTP server. GFS LAMP guidance is available in the following formats: ASCII, BUFR, and GRIB2. For details about these products and how to access them from the NWS FTP server, please refer to https://www.weather.gov/mdl/lamp_NWS_ftp_server.

For details regarding the ASCII text product see https://vlab.ncep.noaa.gov/web/mdl/lamp-card.

For details regarding the BUFR product see https://vlab.ncep.noaa.gov/web/mdl/lamp-bufr.

For details regarding the GRIB2 products see https://vlab.ncep.noaa.gov/web/mdl/lamp-grib2.

Please note that these products are now in the operational stage, and are supported operationally. Please let us know if you notice any problems.

Thank you for your interest in LAMP.

Judy Ghirardelli

NWS/OST/MDL/LAMP

2006 August 3

Notice of Flaw in GFS-LAMP Thunderstorm Forecasts

THURSDAY JULY 27, 2006

Attention LAMP users:

The GFS-based LAMP thunderstorm probability and categorical forecasts, which became official in the NWS on 25 July 2006, presently contain a noticeable problem. The problem consists of choppiness/roughness in the forecast patterns and a slight degradation in accuracy. A fix for the problem is presently scheduled for implementation on or about August 1st.

The following image is an example that contains the flaw.

The following image is an example of our fix.

Please let us know if you see any further problems or have any questions.

Thank you for your interest in LAMP.

Dr. Jerome Charba and Jerry Wiedenfeld

NWS/OST/MDL/LAMP

2006 July

LAMP Change Notice

MONDAY JULY 17, 2006

Attention LAMP users:

Effective on or about July 20, 2006 the GFS-LAMP guidance from the 1500 UTC cycle will be available on the web site https://vlab.ncep.noaa.gov/web/mdl/lamp. This is in addition to the currently running 03 UTC, 09 UTC, and 21 UTC cycles. Guidance from the most recent cycle will automatically display when the LAMP bulletin or meteogram is selected.

GFS-LAMP Thunderstorm Guidance will now also be available in bulletin form for the 15 UTC cycle.

Our next GFS-LAMP cycle to be available will be 00 UTC during early fall.

Please note that these products are still in the experimental stage, and are not supported operationally. Please let us know if you notice any problems.

Please let us know if you see any problems or have any questions.

Thank you for your interest in LAMP.

Jerry Wiedenfeld

NWS/OST/MDL/LAMP

2006 June 6

LAMP Change Notice

MONDAY JUNE 06, 2006

Attention LAMP users:

Effective 2100 UTC June 6, 2006 the GFS-LAMP guidance for precipitation type will be available for the Alaskan stations. In general precipitation type will be available for only Alaskan stations during the period of June 1 through August 31. From September 1 through May 31 GFS-LAMP precipitation type guidance will be available for all GFS-MOS stations that provide guidance for precipitation type.

Please note that these products are still in the experimental stage, and are not supported operationally. Please let us know if you notice any problems.

Please let us know if you see any problems or have any questions.

Thank you for your interest in LAMP.

Jerry Wiedenfeld

NWS/OST/MDL/LAMP

2006 June 5

LAMP Change Notice

MONDAY JUNE 05, 2006

Attention LAMP users:

Effective June 5, 2006 the GFS-LAMP guidance from the 0300 UTC cycle will be available on the web site https://vlab.ncep.noaa.gov/web/mdl/lamp. This is in addition to the currently running 09 UTC and 21 UTC cycles. Guidance from the most recent cycle will automatically display when the LAMP bulletin or meteogram is selected.

GFS-LAMP Thunderstorm Guidance will now also be available in bulletin form for the 03 UTC cycle.

Our next GFS-LAMP cycle to be available will be 15 UTC, on or about July 1st, 2006.

Please note that these products are still in the experimental stage, and are not supported operationally. Please let us know if you notice any problems.

Please let us know if you see any problems or have any questions.

Thank you for your interest in LAMP.

Judy Ghirardelli

NWS/OST/MDL/LAMP

2006 May 8

LAMP Change Notice

MONDAY MAY 08, 2006

Attention LAMP users:

Effective May 8, 2006 the GFS-LAMP Thunderstorm guidance from the 03 UTC, 15 UTC, and 21 UTC cycles will be available on the web site https://vlab.ncep.noaa.gov/web/mdl/lamp. This is in addition to the currently running 09 UTC cycle. Guidance from the most recent cycle will automatically display when the new graphics are created.

LAMP thunderstorm guidance at stations is available in both 09 and 21 UTC cycles in the LAMP text bulletin.

Please note that these products are still in the experimental stage, and are not supported operationally. Please let us know if you notice any problems.

Please let us know if you see any problems or have any questions.

Thank you for your interest in LAMP.

Judy Ghirardelli

NWS/OST/MDL/LAMP

2006 May 1

LAMP Change Notice

MONDAY MAY 01, 2006

Attention LAMP users:

Effective May 1, 2006 the GFS-LAMP guidance from the 21 UTC cycle will be available on the web site https://vlab.ncep.noaa.gov/web/mdl/lamp. This is in addition to the currently running 09 UTC cycle. Guidance from the most recent cycle, either 09 or 21 UTC, will automatically display when the LAMP bulletin or meteogram is selected.

As of now, the thunderstorm guidance in graphical format is only available from the 09 UTC cycle. LAMP thunderstorm guidance at stations is available in both 09 and 21 UTC cycles in the LAMP text bulletin. The thunderstorm graphics for the 2100 UTC cycle will be forthcoming, and a notice will be sent out when they are available.

Our next GFS-LAMP cycle to be available will be 03 UTC, on or about June 1st, 2006.

Please note that these products are still in the experimental stage, and are not supported operationally. Please let us know if you notice any problems.

Please let us know if you see any problems or have any questions.

Thank you for your interest in LAMP.

Judy Ghirardelli

NWS/OST/MDL/LAMP

2006 March

LAMP Change Notice

WEDNESDAY MARCH 15, 2006

Attention LAMP users:

On Thursday March 16, 2006, the 0900 UTC guidance for thunderstorms in a 2-hr period will be added to the GFS-LAMP bulletin available at:

https://vlab.ncep.noaa.gov/web/mdl/lamp

During the week of March 20, images depicting the LAMP thunderstorm guidance will also become available on the web site.

Please let us know if you see any problems or have any questions.

Thank you for your interest in LAMP.

Judy Ghirardelli

NWS/OST/MDL/LAMP

2006 January

LAMP Announcement

January 6, 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 17, 2006, the web site https://vlab.ncep.noaa.gov/web/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:

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

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 17, 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