NOUS41 KWBC 211444



Public Information Notice

National Weather Service Headquarters Washington DC

1036 AM EDT Fri Jun 21 2013


To:        Subscribers:

           -Family of Services

           -NOAA Weather Wire Service

           -Emergency Managers Weather Information Network


           Other NWS partners and NWS employees


From:      Eli Jacks

           Chief, Fire and Public Weather Services Branch


Subject:   Soliciting Comments until July 30, 2013, on National

           Centers for Environmental Prediction Storm Prediction

           Center Dry Thunderstorm Fire Weather Outlooks for

           Days 4-8, CONUS Only


NWS is accepting comments beginning June 25, 2013, at 1500 Coordinated

Universal Time (UTC), and continuing through July 30, 2013, on

experimental categorical forecasts of dry thunderstorm conditions for

Days 4 through 8.  Web feedback can be provided via an NWS customer

survey link on the National Centers for Environmental Prediction (NCEP)

Storm Prediction Center (SPC) webpage:



These products are issued once a day at 2200 UTC for the CONUS only.


Operationally the SPC already produces daily categorical forecasts of

critical fire weather conditions from dry thunderstorms for Days 1, 2 and

3; however, federal land management agency Predictive Services Units, NWS

Weather Forecast Office (WFO) meteorologists and other users in the fire

weather community have expressed interest in using longer range outlooks

of dry thunderstorm critical fire weather areas for

Day 4 through Day 8.


Forecasts of dry thunderstorm critical fire weather areas are based on

areas where a combination of numerous cloud-to-ground lightning strikes,

generally less than one-tenth inch of rain and dry fuels are forecast.


The SPC Day 4-8 Dry Thunderstorm Fire Weather Outlooks will be available

as National Digital Forecast Database (NDFD) grids, Redbook Graphics, and

online at:



Additional information is available from the online Product Description




The text Day 3-8 Outlook will also include a discussion of the individual

fire weather areas and conditions.  The AWIPS IDs and WMO Headers for the

Day 3-8 Fire Weather Outlook product suite remain unchanged.


The WMO Headers for the experimental CONUS Day 4-8 Dry Thunderstorm NDFD

grids from the SPC are;


    Day 4 LDIY41 KWNS

    Day 5 LDIY51 KWNS

    Day 6 LDIY61 KWNS

    Day 7 LDIY71 KWNS

    Day 8 LDIY81 KWNS


After the experimental period, a decision will be made to either continue

testing with no changes, revise the test, or make the experimental

product operational.


For more information, please contact:


    John Ferree

    NWS Severe Storms Services

    Norman, OK  73072



National Public Information Notices are online at: