Intelligent Use of LAPS. By Ed Szoke 20 May 1999. LAPS. A system designed to: Exploit all available data sources Create analyzed and forecast grids Build products for specific forecast applications Use advanced display technology …All within the local weather office.
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20 May 1999
A system designed to:
…All within the local weather office
“THE CONCEPT OF THE LOCAL DATA BASE IS CENTRAL TO FUTURE OPERATIONS…THE MOST COMPLETE DATA SETS WILL ONLY BE AVAILABLE TO THE LOCAL WFO. THE NEW OBSERVING SYSTEMS ARE DESIGNED TO PROVIDE INTEGRATED 3-D DEPICTIONS OF THE RAPIDLY CHANGING STATE OF THE ENVIRONMENT.”
-Strategic plan for the modernization and associated restructuring of the National Weather Service
Result ----------------> Inaccurate,
Rough Climatological Estimates
Use of meso-beta models
SOLUTION: The KALMAN FILTER
provides access to many links including:
AWIPS SURFACE SATELLITE RADAR SOUNDING PROFILER BACKGROUND MODEL
4.1 METARS 8bit IR Only None Inactive Network RUC (Can use Eta)
4.2 +LDAD** Same Low-level Inactive Network RUC (Can use Eta)
Z, Level 3
RPG, No V
Full All Derived Mulitple RAOBS RASS Other Models
LAPS Soundings Radars Boundary
10bit IR All levels Layer
& VIS Z and V Profilers
** if Available
"...for the hourly LAPS soundings, you can go to interactive skew-T, and loop the editable soundings from one hour to the next, and get a more accurate idea of how various parameters are changing on an hourly basis...nice. We continue to find considerable use of the LAPS data (including soundings) for short-term convective forecasting."
There are 3 main components
See Steve Albers discussion at
An example of the use of LAPS in convective event
13-14 May 1999
Location: DEN-BOU WFO
Similar over the plains.
Note the strong thermal gradient aloft from NW-S (snowing in southern WY) and the LL moisture gradient across eastern CO.
The omega field has considerable detail (which is highly influenced by topography
Are they real?
SFM forecast showing details of the orographic precipitation, as well as capturing the Longmont anticyclone flow on the plains