Region Southeast
The readings under the map are for the whole map, not only the part shown.
GFS · Run 00Z 1 Oct · +0 h · Valid Thu 00Z 1 Oct
Deepest column 73 mm near Tuxpan, Mexico
Deepest column 76 mm, 45 km NW of Mazatlán, Mexico
Deepest column 74 mm, 60 km SW of La Cruz, Mexico
Deepest column 75 mm at 20.0N 109.5W
Deepest column 76 mm, 50 km WNW of Beeville, Texas
Deepest column 73 mm at 20.0N 109.5W
Deepest column 74 mm at 20.0N 110.75W
Deepest column 75 mm at 20.0N 111.5W
Deepest column 75 mm at 20.0N 111.5W
Deepest column 78 mm at 20.0N 111.75W
Deepest column 77 mm at 20.0N 111.5W
Deepest column 77 mm at 20.0N 112.5W
Deepest column 75 mm at 20.0N 113.0W
Deepest column 75 mm at 20.25N 114.0W
Deepest column 74 mm at 20.25N 114.25W
Deepest column 75 mm at 20.0N 114.75W
Deepest column 75 mm at 20.25N 116.0W
Deepest column 76 mm at 20.0N 117.0W
Deepest column 74 mm at 20.25N 117.5W
Deepest column 75 mm at 20.5N 117.75W
Deepest column 75 mm at 20.0N 118.0W
One GFS run, issued 00Z 1 Oct — played forward 6 hours at a time, from the analysis to 120 hours out.
Methodology
PWAT — precipitable water — is how much water vapour the air overhead holds, as the depth of water it would make if it all fell at once.
Six-hourly to 120 hours. GFS forecasts out to 384 hours; this film stops at 120.
The colours are a depth scale, the same everywhere: the cream band is a depth, not a normal. The same column is deep for Salt Lake City and shallow for Miami, so this map cannot say whether the air is unusual — the Relative to normal chart ranks each place against its own record, and that is the one to read for that.
GFS files this field as PWAT and ECMWF as total column water vapour, the same quantity. Uncorrected model output.
This map is drawn from model output we store ourselves, not from anyone's picture of it, and is based on data and products of NOAA. The per-city read of the same day — which cities the models are fighting about, and what the discussion makes of it — is on the national page.
Sources and licences
- NOAA: GFS, from NOAA's NOMADS server. US government data, not subject to copyright (NOAA/NWS terms of use).
What we change: each field is cropped to the frame these maps share when we download it, and each map then smooths, contours, differences or ranks those numbers as its Methodology says. These are our maps of the providers' numbers, not their products, and none of them has reviewed or endorsed this site.
Coastlines, borders, lakes and place names: Natural Earth, public domain.