NWS MOS Download Interface

This page allows you to download from the IEM's archive of NWS MOS data. The archive goes back to June 2000. You can set the start and end times to the same time to get that particular run.

For dates after 25 Feb 2020, the NBS was only archived for the 1, 7, 13, and 19 UTC cycles as per guidance from the MOS developers. For dates before 25 Feb 2020, the NBS was only archived for 0, 7, 12, and 19 UTC runs.

Backend documentation exists for those wishing to script against this service.

Data Request Form

Start Date
End Date (inclusive)

Description of MOS Variables

Variable Description
n_xMax/Min Temp [°F]
tmpTemperature [°F]
dptDew Point Temperature [°F]
wbgWet Bulb Temperature [°F]
cldCloud Coverage
wdrWind Direction [tens of deg]
wspWind Speed [kt]
p066 Hr PoP [%]
p1212 Hr PoP [%]
q066 Hr QPF [0.01 in]
q1212 Hr QPF [0.01 in]
t066 Hr Thunderstorm Probability [%]
t1212 Hr Thunderstorm Probability [%]
snwCategorical Snow
cigCeiling Height [100s ft]
visVisibility [0.1 mi]
obvObstruction to Vision
pozFreezing Rain Probability [%]
posSnowfall Probability [%]
typPrecipitation Type
skySky Coverage [%]
gstWind Gust [kt]
t033 Hr Thunderstorm Probability [%]
pzrConditional Probability of Freezing Rain [%]
psnConditional Probability of Snow [%]
pplConditional Probability of Sleet/Ice Pellets [%]
praConditional Probability of Rain [%]
s066 Hr Snow Amount [0.1 in]
slvSnow Level [100s ft MSL]
i066 Hr Ice Amount [0.01 in]
lcbLowest Cloud Base [100s ft]
swhSignificant Wave Height [ft]
durDuration of Precipitation [hr]
mhtMixing Height [100s ft AGL]
twdTransport Wind Direction [tens of deg]
twsTransport Wind Speed [kt]
hidHaines Index (unitless)
solSolar Radiation [10s W/m2]
q2424 Hr QPF [0.01 in]
p2424 Hr PoP [%]
t2424 Hr Thunderstorm Probability [%]
ccgLegacy MOS Code CCG
ppoLegacy MOS Code PPO
pcoLegacy MOS Code PCO
cvsLegacy MOS Code CVS
lp1Legacy MOS Code LP1
lc1Legacy MOS Code LC1
cp1Legacy MOS Code CP1
cc1Legacy MOS Code CC1
s1212 Hr Snow Amount [0.1 in]
i1212 Hr Ice Amount [0.01 in]
s2424 Hr Snow Amount [0.1 in]
pzpLegacy MOS Code PZP
prsLegacy MOS Code PRS
txn18 Hr Max/Min Temperature [°F]
xndStd Dev of Max/Min Temperature [°F]
tsdTemperature Std Dev [°F]
dsdDew Point Temperature Std Dev [°F]
ifcProbability of Ceiling IFR Conditions [%]
ifvProbability of Visibility IFR Conditions [%]
mvcProbability of Ceiling MVFR Conditions [%]
mvvProbability of Visibility MVFR Conditions [%]
livProbability of Visibility LIFR Conditions [%]
wsdWind Speed Std Dev [kt]
p011 Hr PoP [%]
pc1Legacy MOS Code PC1