NOUS41 KWBC 211249

PNSWSH

 

Technical Implementation Notice 14-37

National Weather Service Headquarters Washington DC

850 AM EDT Thu Aug 21 2014

 

To:       Subscribers:

          -Family of Services

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network

          -NOAAPORT

          Other NWS Partners, Users and Employees

 

From:     Timothy McClung

          Science Plans Branch Chief

          Office of Science and Technology

 

Subject:  Hybrid Single-Particle Lagrangian Integrated

          Trajectory (HYSPLIT) Model Update Effective

          September 30, 2014

 

Effective on or about Tuesday, September 30, 2014, beginning

with the 1200 Coordinated Universal Time (UTC) run, the National

Centers for Environmental Prediction (NCEP) will upgrade the

HYSPLIT modeling system that produces operational predictions of

wildfire smoke and dust from dust storms. There is no change to

the format of the model output.

 

Forecasts from the updated HYSPLIT model are available through a

parallel feed. The smoke HYSPLIT GRIB products for all three

domains (Continental U.S. (CONUS), Alaska and Hawaii) and the

dust product for CONUS from the parallel feed are disseminated

via the NCEP website:

 

http://www.ftp.ncep.noaa.gov/data/nccf/com/hysplit/para/

 

The products also will be displayed through the NCEP website:

 

http://www.emc.ncep.noaa.gov/mmb/aq/hysplit/web/html/

 

Current operational HYSPLIT model will continue providing

forecasts through

 

ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.aq/AR.conus/

 

ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.aq/AR.alaska/

 

ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.aq/AR.hawaii/

 

and displayed at

 

http://airquality.weather.gov/

 

The scientific enhancements include the following:

 

-- Updated automated detection of fires in Canada, Mexico and

Central America that provide inputs for smoke emissions for

smoke predictions

 

-- Added 3-D particle model approach to properly represent the

additional fires identified with automatic fire detection

 

-- Modified the North American Mesoscale (NAM) Analysis and

Forecast System by updating radiation, convective

parameterization, microphysics, advection, hybrid variational

ensemble GSI analysis, satellite bias correction, quality

control of observations, satellite radiance assimilation,

diabatic digital filter, etc.

 

More details about the HYSPLIT are available at:

 

http://www.ready.noaa.gov/HYSPLIT.php

 

For questions regarding these updated predictions, contact:

 

Ivanka Stajner

NOAA/NWS/OST

Silver Spring, MD 20910

ivanka.stajner@noaa.gov

301 713 9001 x 185

 

NWS National Technical Implementation Notices are online at:

 

http://www.nws.noaa.gov/os/notif.htm

 

 

$$