World Meteorological Organization (WMO) Headings have the
format of T1T2A1A2ii CCCC .
WMO super headings are used to aggregate products for the
same parameter (NDFD element) and sector. These aggregate
products contain individual products for all forecast periods.
For these aggregate products the WMO super headings are
consistent with those for individual NDFD products except in
the super headings, the A2 is always Z.
The CCCC for all SPC product WMO headings is KWNS (indicating
they are produced by SPC)
The T1 = L, M, V and E for all GRIB2 and Y, Z, H and O
for GRIB1 (GRIB1 will become obsolete in the near future) product WMO headings.
The T2 indicates the elements:
A = UNASSIGNED
B = UNASSIGNED
C = UNASSIGNED
D = Used for non-NDFD SPC grids
E = Probability of Tornadoes
F = Probability of Hail
G = Probability of Damaging Thunderstorm Winds
H = Probability of Extreme Tornadoes
I = Probability of Extreme Hail
J = Probability of Extreme Thunderstorm Winds
K = Total Probability of Severe Thunderstorms
L = Total Probability of Extreme Severe Thunderstorms
M = Convective Hazard Outlook
N = Fire Weather Critical Area
O = Fire Weather Critical Area Dry Thunderstorm
P = Fire Weather Extremley Critical Area
Q = Enhanced Thunderstorm Outlook Period 1 Product
R = Enhanced Thunderstorm Outlook Period 2 Product
S = UNASSIGNED
T = UNASSIGNED
U = UNASSIGNED
V = UNASSIGNED
W = UNASSIGNED
X = UNASSIGNED
Y = UNASSIGNED
Z = UNASSIGNED
(A1) indicates Area Designator
[NOTE: These are the same for all NDFD products to date]
A = PUERTO RICO [not used by SPC at this time]
B = NORTHEAST
C = MID-ATLANTIC
D = SOUTHEAST
E = EAST GREAT LAKES
F = CENTRAL GREAT LAKES
G = UPPER MISSISSIPPI VALLEY
H = CENTRAL MISSISSIPPI VALLEY
I = SOUTHERN MISSISSIPPI VALLEY
J = NORTHERN PLAINS
K = CENTRAL PLAINS
L = SOUTHERN PLAINS
M = NORTHERN ROCKIES
N = CENTRAL ROCKIES
O = SOUTHERN ROCKIES
P = PACIFIC NORTHWEST
Q = PACIFIC SOUTHWEST
R = ALASKA [not used by SPC at this time]
S = HAWAII [not used by SPC at this time]
T = GUAM [not used by SPC at this time]
U = CONUS
V = NORTHERN HEMISPHER (GRID 227) [not used by SPC at this time]
W = NORTHERN HEMISPHER (GRID 231) [not used by SPC at this time]
X = UNASSIGNED
Y = UNASSIGNED
Z = UNASSIGNED
Refer to the following links for information about the NDFD domains and the 16 pre-defined NDFD CONUS subsectors:
" .gif images (Need to scroll down a bit to get the sector info)
" Flash application (rollover display)
(A2 and ii) indicates Reference Time Designator for products in NDFD:
A = Day 0 ii = hour (0-23) [not used by SPC at this time]
B = Day 1 ii = hour (0-23)
C = Day 2 ii = hour (0-23)
D = Day 3 ii = hour (0-23)
E = Day 4 ii = hour (0-23)
F = Day 5 ii = hour (0-23) [not used by SPC at this time]
G = Day 6 ii = hour (0-23) [not used by SPC at this time]
H = Day 7 ii = hour (0-23) [not used by SPC at this time]
I = Day 8 ii = hour (0-23) [not used by SPC at this time]
J = Day 9 ii = hour (0-23) [not used by SPC at this time]
K = Day 10 ii = hour (0-23) [not used by SPC at this time]
L = Day 11 ii = hour (0-23) [not used by SPC at this time]
M = Day 12 ii = hour (0-23) [not used by SPC at this time]
N = Day 13 ii = hour (0-23) [not used by SPC at this time]
O = Day 14 ii = hour (0-23) [not used by SPC at this time]
P = UNASSIGNED
Q = UNASSIGNED
R = UNASSIGNED
S = UNASSIGNED
T = UNASSIGNED
U = UNASSIGNED
V = UNASSIGNED
W = Weeks [not used by SPC at this time]
X = Months [not used by SPC at this time]
Y = Year [not used by SPC at this time]
Z = Super Header Designation
ii indicates end hour of valid period or time range of grids for super headers:
95 = UNASSIGNED
96 = UNASSIGNED
97 = Days 4-7 at 5.0 km resolution
98 = Days 1-3 at 5.0 km resolution
99 = UNASSIGNED
Explicit List of WMO Super Headings for 9 SPC elements in NDFD:
Probability of Tornadoes Days 1 - 3
LEBZ98 KWNS = NORTHEAST
LECZ98 KWNS = MID-ATLANTIC
LEDZ98 KWNS = SOUTHEAST
LEEZ98 KWNS = EASTERN GREAT LAKES
LEFZ98 KWNS = CENTRAL GREAT LAKES
LEGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LEHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LEIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LEJZ98 KWNS = NORTHERN PLAINS
LEKZ98 KWNS = CENTRAL PLAINS
LELZ98 KWNS = SOUTHERN PLAINS
LEMZ98 KWNS = NORTHERN ROCKIES
LENZ98 KWNS = CENTRAL ROCKIES
LEOZ98 KWNS = SOUTHERN ROCKIES
LEPZ98 KWNS = PACIFIC NORTHWEST
LEQZ98 KWNS = PACIFIC SOUTHWEST
LEUZ98 KWNS = CONUS
Probability of Hail Days 1 - 3
LFBZ98 KWNS = NORTHEAST
LFCZ98 KWNS = MID-ATLANTIC
LFDZ98 KWNS = SOUTHEAST
LFEZ98 KWNS = EASTERN GREAT LAKES
LFFZ98 KWNS = CENTRAL GREAT LAKES
LFGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LFHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LFIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LFJZ98 KWNS = NORTHERN PLAINS
LFKZ98 KWNS = CENTRAL PLAINS
LFLZ98 KWNS = SOUTHERN PLAINS
LFMZ98 KWNS = NORTHERN ROCKIES
LFNZ98 KWNS = CENTRAL ROCKIES
LFOZ98 KWNS = SOUTHERN ROCKIES
LFPZ98 KWNS = PACIFIC NORTHWEST
LFQZ98 KWNS = PACIFIC SOUTHWEST
LFUZ98 KWNS = CONUS
Probability of Damaging Thunderstorm Winds Days 1 - 3
LGBZ98 KWNS = NORTHEAST
LGCZ98 KWNS = MID-ATLANTIC
LGDZ98 KWNS = SOUTHEAST
LGEZ98 KWNS = EASTERN GREAT LAKES
LGFZ98 KWNS = CENTRAL GREAT LAKES
LGGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LGHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LGIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LGJZ98 KWNS = NORTHERN PLAINS
LGKZ98 KWNS = CENTRAL PLAINS
LGLZ98 KWNS = SOUTHERN PLAINS
LGMZ98 KWNS = NORTHERN ROCKIES
LGNZ98 KWNS = CENTRAL ROCKIES
LGOZ98 KWNS = SOUTHERN ROCKIES
LGPZ98 KWNS = PACIFIC NORTHWEST
LGQZ98 KWNS = PACIFIC SOUTHWEST
LGUZ98 KWNS = CONUS
Probability of Extreme Tornadoes Days 1 - 3
LHBZ98 KWNS = NORTHEAST
LHCZ98 KWNS = MID-ATLANTIC
LHDZ98 KWNS = SOUTHEAST
LHEZ98 KWNS = EASTERN GREAT LAKES
LHFZ98 KWNS = CENTRAL GREAT LAKES
LHGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LHHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LHIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LHJZ98 KWNS = NORTHERN PLAINS
LHKZ98 KWNS = CENTRAL PLAINS
LHLZ98 KWNS = SOUTHERN PLAINS
LHMZ98 KWNS = NORTHERN ROCKIES
LHNZ98 KWNS = CENTRAL ROCKIES
LHOZ98 KWNS = SOUTHERN ROCKIES
LHPZ98 KWNS = PACIFIC NORTHWEST
LHQZ98 KWNS = PACIFIC SOUTHWEST
LHUZ98 KWNS = CONUS
Probability of Extreme Hail Days 1 - 3
LIBZ98 KWNS = NORTHEAST
LICZ98 KWNS = MID-ATLANTIC
LIDZ98 KWNS = SOUTHEAST
LIEZ98 KWNS = EASTERN GREAT LAKES
LIFZ98 KWNS = CENTRAL GREAT LAKES
LIGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LIHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LIIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LIJZ98 KWNS = NORTHERN PLAINS
LIKZ98 KWNS = CENTRAL PLAINS
LILZ98 KWNS = SOUTHERN PLAINS
LIMZ98 KWNS = NORTHERN ROCKIES
LINZ98 KWNS = CENTRAL ROCKIES
LIOZ98 KWNS = SOUTHERN ROCKIES
LIPZ98 KWNS = PACIFIC NORTHWEST
LIQZ98 KWNS = PACIFIC SOUTHWEST
LIUZ98 KWNS = CONUS
Probability of Extreme Thunderstorm Winds Days 1 - 3
LJBZ98 KWNS = NORTHEAST
LJCZ98 KWNS = MID-ATLANTIC
LJDZ98 KWNS = SOUTHEAST
LJEZ98 KWNS = EASTERN GREAT LAKES
LJFZ98 KWNS = CENTRAL GREAT LAKES
LJGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LJHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LJIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LJJZ98 KWNS = NORTHERN PLAINS
LJKZ98 KWNS = CENTRAL PLAINS
LJLZ98 KWNS = SOUTHERN PLAINS
LJMZ98 KWNS = NORTHERN ROCKIES
LJNZ98 KWNS = CENTRAL ROCKIES
LJOZ98 KWNS = SOUTHERN ROCKIES
LJPZ98 KWNS = PACIFIC NORTHWEST
LJQZ98 KWNS = PACIFIC SOUTHWEST
LJUZ98 KWNS = CONUS
Total Probability of Severe Thunderstorms Days 1-3
LKBZ98 KWNS = NORTHEAST
LKCZ98 KWNS = MID-ATLANTIC
LKDZ98 KWNS = SOUTHEAST
LKEZ98 KWNS = EASTERN GREAT LAKES
LKFZ98 KWNS = CENTRAL GREAT LAKES
LKGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LKHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LKIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LKJZ98 KWNS = NORTHERN PLAINS
LKKZ98 KWNS = CENTRAL PLAINS
LKLZ98 KWNS = SOUTHERN PLAINS
LKMZ98 KWNS = NORTHERN ROCKIES
LKNZ98 KWNS = CENTRAL ROCKIES
LKOZ98 KWNS = SOUTHERN ROCKIES
LKPZ98 KWNS = PACIFIC NORTHWEST
LKQZ98 KWNS = PACIFIC SOUTHWEST
LKUZ98 KWNS = CONUS
Total Probability of Extreme Severe Thunderstorms Days 1 - 3
LLBZ98 KWNS = NORTHEAST
LLCZ98 KWNS = MID-ATLANTIC
LLDZ98 KWNS = SOUTHEAST
LLEZ98 KWNS = EASTERN GREAT LAKES
LLFZ98 KWNS = CENTRAL GREAT LAKES
LLGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LLHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LLIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LLJZ98 KWNS = NORTHERN PLAINS
LLKZ98 KWNS = CENTRAL PLAINS
LLLZ98 KWNS = SOUTHERN PLAINS
LLMZ98 KWNS = NORTHERN ROCKIES
LLNZ98 KWNS = CENTRAL ROCKIES
LLOZ98 KWNS = SOUTHERN ROCKIES
LLPZ98 KWNS = PACIFIC NORTHWEST
LLQZ98 KWNS = PACIFIC SOUTHWEST
LLUZ98 KWNS = CONUS
Convective Hazard Outlook Days 1 - 3
LMBZ98 KWNS = NORTHEAST
LMCZ98 KWNS = MID-ATLANTIC
LMDZ98 KWNS = SOUTHEAST
LMEZ98 KWNS = EASTERN GREAT LAKES
LMFZ98 KWNS = CENTRAL GREAT LAKES
LMGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LMHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LMIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LMJZ98 KWNS = NORTHERN PLAINS
LMKZ98 KWNS = CENTRAL PLAINS
LMLZ98 KWNS = SOUTHERN PLAINS
LMMZ98 KWNS = NORTHERN ROCKIES
LMNZ98 KWNS = CENTRAL ROCKIES
LMOZ98 KWNS = SOUTHERN ROCKIES
LMPZ98 KWNS = PACIFIC NORTHWEST
LMQZ98 KWNS = PACIFIC SOUTHWEST
LMUZ98 KWNS = CONUS
Convective Hazard Outlook for Days 4-7
LMBZ97 KWNS = NORTHEAST
LMCZ97 KWNS = MID-ATLANTIC
LMDZ97 KWNS = SOUTHEAST
LMEZ97 KWNS = EASTERN GREAT LAKES
LMFZ97 KWNS = CENTRAL GREAT LAKES
LMGZ97 KWNS = UPPER MISSISSIPPI VALLEY
LMHZ97 KWNS = CENTRAL MISSISSIPPI VALLEY
LMIZ97 KWNS = SOUTHERN MISSISSIPPI VALLEY
LMJZ97 KWNS = NORTHERN PLAINS
LMKZ97 KWNS = CENTRAL PLAINS
LMLZ97 KWNS = SOUTHERN PLAINS
LMMZ97 KWNS = NORTHERN ROCKIES
LMNZ97 KWNS = CENTRAL ROCKIES
LMOZ97 KWNS = SOUTHERN ROCKIES
LMPZ97 KWNS = PACIFIC NORTHWEST
LMQZ97 KWNS = PACIFIC SOUTHWEST
LMUZ97 KWNS = CONUS
FIRE WEATHER CRITICAL AND EXTREMELY CRITICAL AREAS FOR DAYS 1-3
LNBZ98 KWNS = NORTHEAST
LNCZ98 KWNS = MID-ATLANTIC
LNDZ98 KWNS = SOUTHEAST
LNEZ98 KWNS = EASTERN GREAT LAKES
LNFZ98 KWNS = CENTRAL GREAT LAKES
LNGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LNHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LNIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LNJZ98 KWNS = NORTHERN PLAINS
LNKZ98 KWNS = CENTRAL PLAINS
LNLZ98 KWNS = SOUTHERN PLAINS
LNMZ98 KWNS = NORTHERN ROCKIES
LNNZ98 KWNS = CENTRAL ROCKIES
LNOZ98 KWNS = SOUTHERN ROCKIES
LNPZ98 KWNS = PACIFIC NORTHWEST
LNQZ98 KWNS = PACIFIC SOUTHWEST
LNUZ98 KWNS = CONUS
FIRE WEATHER CRITICAL AND EXTREMELY CRITICAL AREAS FOR DAYS 4-7
LNBZ97 KWNS = NORTHEAST
LNCZ97 KWNS = MID-ATLANTIC
LNDZ97 KWNS = SOUTHEAST
LNEZ97 KWNS = EASTERN GREAT LAKES
LNFZ97 KWNS = CENTRAL GREAT LAKES
LNGZ97 KWNS = UPPER MISSISSIPPI VALLEY
LNHZ97 KWNS = CENTRAL MISSISSIPPI VALLEY
LNIZ97 KWNS = SOUTHERN MISSISSIPPI VALLEY
LNJZ97 KWNS = NORTHERN PLAINS
LNKZ97 KWNS = CENTRAL PLAINS
LNLZ97 KWNS = SOUTHERN PLAINS
LNMZ97 KWNS = NORTHERN ROCKIES
LNNZ97 KWNS = CENTRAL ROCKIES
LNOZ97 KWNS = SOUTHERN ROCKIES
LNPZ97 KWNS = PACIFIC NORTHWEST
LNQZ97 KWNS = PACIFIC SOUTHWEST
LNUZ97 KWNS = CONUS
FIRE WEATHER CRITICAL AREAS FOR DRY THUNDERSTORMS FOR DAYS 1-3
LOBZ98 KWNS = NORTHEAST
LOCZ98 KWNS = MID-ATLANTIC
LODZ98 KWNS = SOUTHEAST
LOEZ98 KWNS = EASTERN GREAT LAKES
LOFZ98 KWNS = CENTRAL GREAT LAKES
LOGZ98 KWNS = UPPER MISSISSIPPI VALLEY
LOHZ98 KWNS = CENTRAL MISSISSIPPI VALLEY
LOIZ98 KWNS = SOUTHERN MISSISSIPPI VALLEY
LOJZ98 KWNS = NORTHERN PLAINS
LOKZ98 KWNS = CENTRAL PLAINS
LOLZ98 KWNS = SOUTHERN PLAINS
LOMZ98 KWNS = NORTHERN ROCKIES
LONZ98 KWNS = CENTRAL ROCKIES
LOOZ98 KWNS = SOUTHERN ROCKIES
LOPZ98 KWNS = PACIFIC NORTHWEST
LOQZ98 KWNS = PACIFIC SOUTHWEST
LOUZ98 KWNS = CONUS
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