NOAA / NWS's Meteorological Development Laboratory
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Degrib (NDFD GRIB2 Decoder) |
NDFD Home | Verification | News | Organization |
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Table of Contents:
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Code | Meaning | Code | Meaning |
---|---|---|---|
<NoCov> | No Coverage / probability | Iso | Isolated |
Sct | Scattered | Num | Numerous |
Wide | Widespread | Ocnl | Occasional |
SChc | Slight Chance | Chc | Chance of |
Lkly | Likely | Def | Definite |
Patchy | Patchy | Areas | Areas of |
Pds | Periods of | Frq | Frequent |
Inter | Intermittent | Brf | Brief |
The posibilities for Weather Type are:
Code | Meaning | Code | Meaning |
---|---|---|---|
<NoWx> | No Weather | K | Smoke |
BD | Blowing Dust | BS | Blowing Snow |
H | Haze | F | Fog |
L | Drizzle | R | Rain |
RW | Rain Showers | A | Hail |
FR | Frost | ZL | Freezing Drizzle |
ZR | Freezing Rain | IP | Ice Pellets (sleet) |
S | Snow | SW | Snow Showers |
T | Thunderstorms | ||
BN | Blowing Sand | ZF | Freezing Fog |
IC | Ice Crystals | IF | Ice Fog |
VA | Volcanic Ash | ZY | Freezing Spray |
WP | Water Spouts |
The posibilities for Intensity are:
Code | Meaning | Code | Meaning |
---|---|---|---|
<NoInten> | No Intensity | -- | Very Light |
- | Light | m | Moderate |
+ | Heavy |
The posibilities for Visibility are: <NoVis>, 0SM, 1/4SM, 1/2SM, 3/4SM, 1SM, 11/2SM, 2SM, 21/2SM, 3SM, 4SM, 5SM, 6SM, P6SM
Hazards (or Attributes) are broken up into upto 5 pieces separated by ','s. The posibilities for Hazards (Attributes) are:
Code | Meaning | Code | Meaning |
---|---|---|---|
None | None | FL | Frequent Lightning |
GW | Gusty Winds | HvyRn | Heavy Rain |
DmgW | Damaging Wind | SmA | Small Hail |
LgA | Large Hail | OLA | Outlying Areas |
OBO | on Bridges and Overpasses | ||
OGA | On Grassy Areas | Dry | dry |
TOR | Tornado | Primary | Highest Ranking |
Mention | Include Unconditionally | OR | or |
MX | mixture |
Degrib has several different ways of handling weather. Starting with the "degrib -P" option, it can:
What is an NDFD simple weather code? In order to create graphical images of weather, NDFD needed a way to combine the various possibilities of weather into a discrete number of colors. So they came up with NDFD simple weather codes
degrib currently (as of 12/15/2006) recognizes four iterations of simple weather codes, as follows:
To get a particular simple weather code using the -P option use:
Continuing to the "degrib -C" option, it is limited in some respects by
the file formats that it writes to.
Page last Modified: December 15, 2006. | ||
US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Meteorological Development Laboratory |
1325 East West Highway Silver Spring, MD 20910 Degrib Questions? Arthur Taylor NDFD Questions? nws.ndfd@noaa.gov |
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