NOAA / NWS's Meteorological Development Laboratory
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Degrib (NDFD GRIB2 Decoder) |
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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.
US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Meteorological Development Laboratory 1325 East West Highway Silver Spring, MD 20910 Page last Modified: December 15, 2006. |
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