NOAA/NWS Digital Services 1 NWS Forecast Evolution and Delivery in a Digital Era Glenn Austin Office of Climate, Water, and Weather Services David Ruth Office of Science and Technology Silver Spring, MD June 6, 2006

NOAA/NWS Digital Services 2 National Digital Forecast Database GOAL: Make NWS information available in digital form and available electronically. HISTORY: NDFD has been operational since 2004.

NOAA/NWS Digital Services 3 Grid Availability Data posted in WMO GRIB2 format at: –ftp://tgftp.nws.noaa.gov/SL.us008001/... Decoder software: –Link: –Function: Allows download and conversion to: Shape files (compatible with ESRI) –Points, Simple polygons, Merged polygons netCDF GrADS –Lat/lon grids, Projected grids Float files Comma Separated Values files Discussions underway with UNIDATA to host data

NOAA/NWS Digital Services 4 NDFD Status Now available at ftp://tgftp.nws.noaa.gov/SL.us008001/... Experimental elements: QPF Snow Amount Sky Cover Significant Wave Height Operational elements: Maximum Temperature Minimum Temperature Temperature Dew Point Probability of Precipitation Weather Wind Direction Wind Speed Apparent Temperature Relative Humidity ST.opnl/DF.gr2/DC.ndfd/ST.expr/DF.gr2/DC.ndfd/

NOAA/NWS Digital Services 5 Summer Releases TPC Probability of Tropical Cyclone Wind Speeds (July) (TIN-xx issued June x) Experimental Real-Time Mesoscale hourly Analysis (August) (TIN-24 issued May 2) Day 1-3/4-7 file split (September) (TIN-30 issued May 9)

NOAA/NWS Digital Services 6 National Digital Forecast Database To be available at ftp://tgftp.nws.noaa.gov/SL.us008001/... Developmental elements (from WFOs): Hazard grids Wind gusts Maximum Relative Humidity Minimum Relative Humidity ST.expr/DF.gr2/DC.ndfd/

NOAA/NWS Digital Services 7 National Digital Forecast Database To be available at ftp://tgftp.nws.noaa.gov/SL.us008001/... Developmental elements (from TPC): Probability of Tropical Cyclone Wind Speeds >34kt (incremental) Probability of Tropical Cyclone Wind Speeds >34kt (cumulative) Probability of Tropical Cyclone Wind Speeds >50kt (incremental) Probability of Tropical Cyclone Wind Speeds >50kt (cumulative) Probability of Tropical Cyclone Wind Speeds >64kt (incremental) Probability of Tropical Cyclone Wind Speeds >64kt (cumulative) ST.expr/DF.gr2/DC.ndfd/

NOAA/NWS Digital Services 8 Tropical Cyclone Surface Wind Speed Probability Hurricane Wilma – Oct 2005

NOAA/NWS Digital Services 9 National Digital Forecast Database To be available at ftp://tgftp.nws.noaa.gov/SL.us008001/... Developmental elements (from SPC): Probability of Tornadoes Probability of Hail Probability of Severe Storm Winds Probability of Significant Tornadoes Probability of Significant Hail Probability Significant Severe Storm Winds Total Probability of Severe Storms ST.expr/DF.gr2/DC.ndfd/

NOAA/NWS Digital Services 10 National Digital Forecast Database To be available at ftp://tgftp.nws.noaa.gov/SL.us008001/... Developmental elements (from CPC): Probability of 8-14 Day Temperature Above Normal Probability of 8-14 Day Temperature Below Normal Probability of 8-14 Day Precipitation Above Normal Probability of 8-14 Day Precipitation Below Normal Probability of 30 Day Temperature Above Normal Probability of 30 Day Temperature Below Normal Probability of 30 Day Precipitation Above Normal Probability of 30 Day Precipitation Below Normal Probability of 90 Day Temperature Above Normal Probability of 90 Day Temperature Below Normal Probability of 90 Day Precipitation Above Normal Probability of 90 Day Precipitation Below Normal ST.expr/DF.gr2/DC.ndfd/

NOAA/NWS Digital Services 11 National Digital Guidance Database Now available at ftp://tgftp.nws.noaa.gov/SL.us008001/... Operational Air Quality elements: 1 hour Ozone Concentration (3x) 8 hour Ozone Concentration (3x) Experimental Gridded MOS elements: Maximum Temperature Minimum Temperature Temperature Dew Point Probability of Precipitation 06h Probability of Precipitation 12h Probability of Thunderstorms 03h Probability of Thunderstorms 06h Probability of Thunderstorms 12h Relative Humidity Experimental Air Quality elements: 1 hour Surface Smoke 1 hour Vertical Smoke Integration 1 hour Ozone Concentration (5x) 8 hour Ozone Concentration (5x) ST.opnl/DF.gr2/DC.ndgd/ ST.expr/DF.gr2/DC.ndgd/ ST.expr/DF.gr2/DC.ndgd/GT.mosgfs/

NOAA/NWS Digital Services 12 Ozone for full CONUS

NOAA/NWS Digital Services 13 National Digital Guidance Database To be available at ftp://tgftp.nws.noaa.gov/SL.us008001/... Experimental Gridded MOS elements:  Wind Direction  Wind Speed  Wind Gusts  Sky Cover  Precipitation Type  Quantitative Precipitation – 06h  Quantitative Precipitation – 12h  Snowfall Amount ST.expr/DF.gr2/DC.ndgd/GT.rtma/ST.expr/DF.gr2/DC.ndgd/GT.mosgfs/ Experimental Real-Time Mesoscale Analysis elements:  Temperature  Dew Point  Wind Direction  Wind Speed  Quantitative Precipitation  Sky Cover Experimental Hurricane Storm- Surge Probabilities:  Probability of Exceeding 5 feet  10 Percent Exceedance Height ST.expr/DF.gr2/DC.ndgd/GT.slosh/

NOAA/NWS Digital Services 14 NDFD Capabilities in Development Day 1-3/Day 4-7 file split XML to query which grids have changed by element, projection, and WFO Experimental grids for Alaska Hourly grids on day km grids Analysis of Record Probability grids that quantify uncertainty

NOAA/NWS Digital Services 15 Technical Workshop for Digital Product Users PROPOSED DATE: November 2006 LOCATION: Silver Spring, MD

NOAA/NWS Digital Services 16 Questions, Comments? x x157