Transcript Document 7842339

Interactive Web Access to
Historical Weather Data
Archives
Willa Zhu, PMEL
David Schultz, NSSL
Kevin Kelleher, NSSL
Background
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National Severe Storms Laboratory (NSSL)
holds a variety of unique and disparate
historical weather data archives including
in-situ surface meteorological and
radiosonde data sets.
These data are largely underutilized due
to difficulty to access.
The goal is to provide a web-based access
system to these atmospheric in-situ data
by leveraging from PMEL’s web application
and technologies.
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Historical Weather Data Archives
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Data and Database
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Data type
• Surface
• Upper-air
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Data format
• GEMPAK format (one file per day)
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Database (MySQL)
• Meta information
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Software and Tools
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GEMPAK package is used as analysis,
display and listing tools
A set of scripts are developed to load
and manage database
GMT tools is used to generate maps
Dynamic HTML (CSS) is implemented
to enhance web interactivity
PHP is used to communicate with DB,
initiate backend application and create
dynamic web contents
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Data Access Results
Display/list station information
 Plot data on station map
 List data
 Plot time series
 Plot profile (for upper-air data)
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NSSL Historical Weather Data Archives
Divide
area into
several
regions
for quick
selection
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Interactive Area Selection
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Mouse-over Station to view info
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Surface Data Station Information List
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Surface Data Plot on Map Options
(using GEMPAK sfmap)
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Time
Area
Parameters
Position for
Param.
Help Available
NOAATech 2006
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Historical Weather Data Archives
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Example of
Surface data plot on map
(using sfmap)
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Surface Data List Options (using GEMPAK sflist)
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Time Range
Area or
stations
Parameters
Help Available
NOAATech 2006
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Historical Weather Data Archives
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Example of Surface data List
(using sflist)
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Surface Data Time Series Plot Options
(using GEMPAK sfgram)
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Time Range
Stations
Parameters
Help Available
NOAATech 2006
Nov. 1-3, 2005
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Historical Weather Data Archives
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Example of Surface data
Time series plot (using sfgram)
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Historical Weather Data Archives
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Upper-air Data Stations
Profile added
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Historical Weather Data Archives
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Upper-air Data Station Information List
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Upper-air Data Plot on Map Options
(using GEMPAK snmap)
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Time
Area
Parameters
Position for
Param.
Vertical
Coordinate
Level
Help Available
NOAATech 2006
Nov. 1-3, 2005
Interactive Web Access to
Historical Weather Data Archives
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Example of Upper-air data plot on map (using snmap)
NOAATech 2006
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Historical Weather Data Archives
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Upper-air Data List Options (using GEMPAK snlist)
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Time Range
Area or
stations
Parameters
Vertical
Coordinate
Levels
Help Available
NOAATech 2006
Nov. 1-3, 2005
Interactive Web Access to
Historical Weather Data Archives
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Example of Upper-air data List
(using GEMPAK snlist)
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Historical Weather Data Archives
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Upper-air Data Time Series Plot Options
(using GEMPAK sntser)
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Historical Weather Data Archives
Time Range
Single Station
Single Parameter
Vertical Coordinate
Level
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Example of Upper-air Time Series Plot
(using GEMPAK snlist)
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Historical Weather Data Archives
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Upper-air Data Profile Plot Options
(using GEMPAK snprof)
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Time Range
Single Station
Parameters
Vertical Coordinate
Levels
Interactive Web Access to
Historical Weather Data Archives
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Example of Upper-air Profile Plot
(using GEMPAK snprof)
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Summary
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This interactive Web Access system
provides an easy and convenient way for
scientists and other users to access
historical weather data archives.
This web interface system is customized
for using with GEMPAK tools but can be
extended to support other data format
with different application and tools.
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Historical Weather Data Archives
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