Downscaled GFS with Extended Eta (DGEX)

• 12 km, 60 level (downscaled locally to 5km using SmartInit scripts)

• CONUS at 06 and 18Z, AK at 00 and 12Z• 84-192 h, 6-h frequency• New DGEX grids will be developed and added to

production with content to be defined by the ISST.

• CONUS DGEX on AWIPS Grid 218. Alaska DGEX on AWIPS Grid 242.

• SBN’s TG2 channel to carry DGEX data

Expanded HPC Medium-Range Support

• HPC is working to implement the NWS Corporate Board Decision• HPC forecasts at 390 MOS points are available in text format• Also available are HPC forecasts on a 5-km grid using information from ~6000

MOS points and PRISM to add detail to temperatures• Products available now on HPC ftp site:

– max/min temperatures – 12-hour PoP

• Estimated dates for additional fields– dewpoint - Jun 2004– sky cover - Aug 2004– wind direction & speed - Sep 2004

• Problematic fields: weather type, intensity, & character• WFOs can develop smart tools to incorporate local effects• WFOs modify HPC grids at their discretion• WFOs populate the NDFD

HPC day 5 minimum temperature forecast

valid May 4, 2004

Winter Weather Experiment 3 (2003-2004)Overview of Participants & Activities

•Two WFO sectors

• Intermountain (IM) - GREEN

• Non IM - RED

• Total of 77 WFOs

•HPC produced WWE graphics

•Available via HPC website

•WFO-HPC Collaboration

•Scheduled ~15-minute call twice daily

•Also via 12 Planet

Winter Weather Experiment 3 (2003-2004) WFO feedback implications for next winter

• HPC internal products for WFOs should include– Visualization of model preferences, trends, and winter-

weather-related diagnostics NOT already available at WFOs

– Accumulation graphics of S/IP & ZR like previous WWEs but in 24h increments out to 72h

– Notification of product availability via 12 Planet• WFO-HPC collaboration should occur primarily in 12 Planet

– WFOs prefer to collaborate initially WFO to WFO using HPC products as a reference

– HPC-WFO calls should be reserved for when collaboration via 12 Planet is not efficient

• Initiated by WFO– HPC testing 5-minute recorded “streaming”

video map discussion for internal NWS use• HPC public product issuance deadlines

should be changed – To allow more time to prepare internal

NWS products and collaborate with WFOs

Probability of 4-7"

Probability of 8-11" Probability of 12+"

Expected Amounts

24

Streaming Video Test

A Proposed 4-panel Public Product

1998