Public Information Statement
Issued by NWS National HQ

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NOUS41 KWBC 181355
PNSWSH

Public Information Statement 18-13
National Weather Service Headquarters Silver Spring, MD
955 AM EDT Fri May 18 2018

To:  Subscribers:
  -NOAA Weather Wire Service
  -Emergency Managers Weather Information Network
  -NOAAPort
  Other NWS Partners and NWS Employees

From:  Mary Mullusky
  Chief, Water Resources Services Branch

SUBJECT:  Soliciting comments on proposed termination of
  County-based Flash Flood Guidance (FFG) at all locations
  through June 30, 2018

NWS is proposing the termination of the county-based Flash Flood
Guidance (FFG) text products. The NWS has transitioned from using the
county-based FFG (average FFG value based on a county scale) to the
gridded FFG value (the average based on a 4km x 4km scale). The
county-based FFG is produced for only part of CONUS (east of the
Mississippi River). The gridded FFG is produced for the entire United
States. NWS is seeking to determine if external customers use the
county-based FFG rather than the gridded FFG.

The text products for the county-based FFG that NWS is proposing to
terminate are currently found in the following WMO headers:

WMO HeadingAWIPS ID
--------------------------------------------------------------
FOUS61-5FFGxx where xx = two letter identifier for the state
FOUS62 KALRFFGxx where xx = two letter identifier for the state
FOUS64 KFWRFFGxx where xx = two letter identifier for the state
FOUS63 KKRFFFGxx where xx = two letter identifier for the state
FOUS63 KMSRFFGxx where xx = two letter identifier for the state
FOUS64 KORNFFGxx where xx = two letter identifier for the state
FOUS61 KRHAFFGxx where xx = two letter identifier for the state
FOUS61 KTARFFGxx where xx = two letter identifier for the state
FOUS61 KTIRFFGxx where xx = two letter identifier for the state
FOUS64 KTUAFFGxx where xx = two letter identifier for the state

The preferred 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:

WMO Heading
-------------------
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:
http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc.shtml

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

If you have comments or questions, please contact:

Daniel Roman
Hydrologist, NWS Headquarters
daniel.roman@noaa.gov
Silver Spring MD 20910
301-427-9345
or
John Bradley
Hydrologist, NWS Headquarters
john.bradley@noaa.gov
Silver Spring MD 20910
301-427-9360

National Public Information Statements are online at:

http://www.weather.gov/os/notif.htm


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