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The Development of High- and Low-Pressure Systems
Airmasses and Fronts
Extratropical Cyclones Forming East of the Rocky Mountains
Extratropical Cyclones Forming Along the East and Gulf Coasts
Freezing Precipitation and Ice Storms
Lake Effect Snowstorms
Cold Waves
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Mountain Windstorms
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Tornadoes
Hailstorms
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Downbursts
El Niño, La Niña, and the Southern Oscillation
Tropical Cyclones
Floods
Drought
Heat Waves

Forecast Links


US Surface Forecasts
Source Type Maps
NWS/HPC Discussion Short Range Forecast | Extended Forecast | Precipitation Forecast | explanation of contractions
RAP Fronts/precip 12 hour | 24 hour | 36 hour | 48 hour
NOAA/HPC Fronts/precip 12hr | 18 | 24 | 30 | 36 | 48 | 3 days | 4d | 5d

Short Term Forecast (NAM - formerly ETA)
Type Analysis 1/2 day 1 day 1.5 day 2 day 2.5 day 3 day 3.5 day anim
MSLP/Precip. 00 hr 12 hr 24 hr 36 hr 48 hr 60 hr 72 hr 84 hr anim
surface temp 00 hr 12 hr 24 hr 36 hr 48 hr 60 hr 72 hr 84 hr anim
surface dewpt & LI 00 hr 12 hr 24 hr 36 hr 48 hr 60 hr 72 hr 84 hr anim
precip type 00 hr 12 hr 24 hr 36 hr 48 hr 60 hr 72 hr 84 hr anim
Forecast Soundings
Midwest grid map soundings
850mb
temp | wind & heights | vertical vel. | RH & streamlines | dewpt
700mb
temp | wind & heights | vertical vel. | RH & streamlines
500mb
temp | wind & heights | vertical vel. | RH & streamlines | Vorticity
300mb
wind & heights (to 84 hr) | wind & height (to 60 hr) |
250mb
wind & heights | RH & streamlines |

Mid-Range Forecast (GFS - MRF: graphics from Univ. Wisconsin)
Type day 1 day 2 day 3 day 4 day 5 day 6 day 7 day 8 day 9 day 10
Surface day 1 day 2 day 3 day 4 day 5 day 6 day 7 day 8 day 9 day 10
850mb day 1 day 2 day 3 day 4 day 5 day 6 day 7 day 8 day 9 day 10
500 mb day 1 day 2 day 3 day 4 day 5 day 6 day 7 day 8 day 9 day 10
300 mb day 1 day 2 day 3 day 4 day 5 day 6 day 7 day 8 day 9 day 10
4-panel day 1 day 2 day 3 day 4 day 5 day 6 day 7 day 8 day 9 day 10

(GFS-MRF: graphics from COD)
Height Map type
Surface
temperature | MSLP & precip
850mb
temperature | RH | height & vertical vel
700mb
temperature | RH | wind & height
500mb
wind & heights | vorticity | height & vertical vel
250mb
wind & heights

Mid-Range Forecast Animations (GFS-MRF: graphics from Unisys)
Height Map type
SLP/precip
9-panel | animation |
500mb/SLP
9-panel | animation |
1000 mb
9-panel | animation |
850 mb
9-panel | animation |
700 mb
9-panel | animation |
500 mb
9-panel | animation |
300 mb
9-panel | animation |

Long-range Forecast (GFS-MRF)
Temp./Prec.
U.S. Climate Prediction Center

Other forecast sources:

COD (RUC, ETA/NAM, GFS, NGM, ECMWF, UKMET)
RAP (RUC, NAM, GFS)
U. Wisconsin (NAM, NGM, GFS)
Unisys (NAM, GFS, NGM, RUC, ECMWF)
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