National Severe Weather Services Dr. Russell Schneider NOAA-NWS Storm Prediction Center 20 June 2007 opportunities, enhancements & plans Briefing for NWS Partners
Outline Product Refinement Watch Outline Update (WOU) frequency New Products & Service Improvements Day 4-8 Severe Weather Outlook Day 3-8 Fire Weather Outlook Upcoming Extended Range Product Enhancements GIS-friendly latitude-longitude “points” products NDFD compatible grids Standardized MD Headlines Watch Hazard Probabilities
Products should be consistent: National overview from SPC Local nuances from WFOs Watch Update Refinement WOU & WCN
Watch Update Refinement Option 1: Increase Frequency of Current WOU Product Option 2: Create New “Digital Services” Product with Continuous Updates (VTEC & UGC only) Option 3: Focus Efforts on Synchronization of Current Watch Update Process (Watch Status, WCN & WOU updates) Discussion and Suggestions Welcome !!!
Day 4-8 Severe Weather Outlook Description: Line drawn for areas where there is at least a 30% probability for severe thunderstorms (equivalent to a high end slight risk threat). Issued daily with graphic & discussion. Issued: 0935 UTC 18 May 2007 valid: May 2007
Day 3-8 Fire Weather Outlook Issued: 0542 AM CDT Tue June 12, 2007 valid: June 2007 Description: Day 3-8 forecast of “critical” fire weather conditions including potential dry lightning busts. Issued daily with graphic & discussion
Planned Service Enhancements Day 3-8 Fire & Day 4-8 Severe Weather Outlooks GIS friendly latitude-longitude “points” product NDFD compatible grids DAY 1 FIRE WEATHER OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0424 AM CDT TUE JUN VALID TIME Z Z FIRE WEATHER OUTLOOK POINTS DAY 1... FIRE WEATHER CATEGORICAL... CRIT EXTM &&
Planned Service Enhancements Day 3-8 Fire & Day 4-8 Severe Weather Outlooks GIS friendly latitude-longitude “points” product NDFD compatible grids DAY 1 FIRE WEATHER OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0424 AM CDT TUE JUN VALID TIME Z Z FIRE WEATHER OUTLOOK POINTS DAY 1... FIRE WEATHER CATEGORICAL... CRIT EXTM && D4-5 D6
Do all Convective Watches have the same risk? No Watch Hazard Probabilities Tornado (2+ reports):80% EF2+ Tornado: 50% Wind (10+ reports):90% 75 mph Wind:40% Hail (10+ reports):95+% 2”+ Hail:70% Hail & Wind (6+ reports):95+% PDS Tornado Watch: 2006 Tennessee Outbreak
Watch Hazard Probability Product (WWP) Watch Hazard Probabilities Tornado (2+ reports):80% EF2+ Tornado: 50% Wind (10+ reports):90% 75 mph Wind:40% Hail (10+ reports):95+% 2”+ Hail:70% Hail & Wind (6+ reports):95+% Easily Decodable Text Product.. that includes hazards & other key watch attributes
Mesoscale Discussion Headers Standardized [Mesoscale Discussion Product Header Deleted] CONCERNING...SEVERE POTENTIAL...WATCH LIKELY VALID Z Z [Text Deleted] Concerning Lat-Lon
Permitted MD Headers SEVERE POTENTIAL...WATCH UNLIKELY(less than 30%) SEVERE POTENTIAL...WATCH POSSIBLE (30-60%) SEVERE POTENTIAL...WATCH LIKELY (60-90%) SEVERE POTENTIAL...TORNADO WATCH LIKELY (60-90%) SEVERE POTENTIAL...SEVERE THUNDERSTORM WATCH LIKELY (60-90%) SEVERE POTENTIAL...WATCH NEEDED SOON (>90%) SEVERE THUNDERSTORM WATCH TORNADO WATCH HEAVY RAINFALL OUTLOOK UPGRADE 01Z OUTLOOK UPDATE BLIZZARD HEAVY SNOW FREEZING RAIN WINTER MIXED PRECIPITATION