Public Information Statement
Issued by NWS Central Illinois

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NOUS43 KILX 051602
PNSILX
ILZ027>031-036>038-040>057-061>063-066>068-071>073-061615-

Public Information Statement
National Weather Service Lincoln IL
1002 AM CST Mon Nov 5 2018

...TERMINATION OF COUNTY-BASED FLASH FLOOD GUIDANCE...

An official Service Change Notice has been issued by NWS
Headquarters advising of the termination of the County-based
Flash Flood Guidance (FFG) text product, effective Dec. 31, 2018.

The official change notice can be found here...
www.weather.gov/media/notification/pdfs/scn18-80disc_county_ffgaa.pdf

The NWS has transitioned from using county-based FFG (average FFG
values based on a county scale) to gridded FFG values (the
average based on a 4km x 4km scale).

The gridded (GRIB2) products for the FFG (which cover the
continental U.S. on a 4km x 4km grid) are currently found in the
following WMO headers:

ZEGZ98 PACR
ZEGZ98 KALR
ZEGZ98 KFWR
ZEGZ98 KKRF
ZEGZ98 KMSR
ZEGZ98 KORN
ZEGZ98 KPTR
ZEGZ98 KRHA
ZEGZ98 KRSA
ZEGZ98 KSTR
ZEGZ98 KTAR
ZEGZ98 KTIR
ZEGZ98 KTUA

Link to information about GRIB2:
www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc.shtml

Link to ftp site to retrieve the gridded FFG, covering the CONUS:
ftp://ftp.wpc.ncep.noaa.gov/workoff/ffg/

$$


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