Cirrus fibratus
Ice Clouds. Good Weather if
winds from W NW to N. Precipitation likely within 20 to
30 hours if winds steady from NE, E to S
Cirrus spissatus
Ice Clouds.
Good Weather if winds from W, NW to N. Precipitation likely within 20 to
30 hours if winds steady from NE, E to S
Cirrus uncinus
High Ice Clouds. Good Weather if
winds from W, NW to N. Precipitation
likely within 20 to 30 hours if winds steady from NE, E
to S
Cirrus above 45 degrees
High Ice Clouds. Good Weather if winds from W, NW to N. Precipitation likely within 20 to 30 hours if winds steady from NE, E to S
Cirrostratus covering sky
Precipitation likely within 15 to 25 hours if winds steady from NE E to S, or sooner if winds SE to S. Other winds bring overcast sky.
Cirrostratus covering sky
Ice Clouds cover sky. Precipitation likely within 15 to 25 hours if winds steady from NE E to S, or sooner if winds SE to S. Other winds bring overcast sky.
Cirrocumulus
Ice Clouds. Precipitation is likely 15-20 hours if wind NE to S, often afternoon thunderstorms. Other winds overcast
Cirrocumulus
Ice Clouds. Precipitation is likely 15-20 hours if wind NE to S, often afternoon thunderstorms. Other winds overcast.
Cirrocumulus
Ice Clouds. Precipitation likely if wind NE to S. Early summer am often afternoon thunderstorms. Other winds overcast.
Cirrostratus with halo
Precipitation likely within 15 to 24 hours if wind steady from NE to S. Prismatic effect of sun or moon through ice crystals causes halo
Altostratus translucidus
Precipitation likely within 10 to 20 hours if wind is steady from NE to S. Sun appears behind frosted glass. Other winds overcast sky
Altocumulus translucidus
Water and ice clouds. Some precipitation likely within 15 to 20 hours if wind is steady NE to S Other winds bring overcast sky
Altocumulus undulatus
Precipitation likely within 15-20 hours if wind is steady NE to S. Other winds bring overcast sky. Mostly threatens precipitation
Altocumulus perlucidus
Water and ice clouds. Some precipitation likely within 15-20 hours if wind steady from NE to S. Other winds bring overcast sky.
Altostratus translucidus
Precipitation likely in 10 to 15 hours if winds steady NE to S. Sun appears to be behind frosted glass. Other winds bring overcast sky.
Altostratus translucidus
Precipitation likely in 10 to 15 hours if winds steady NE to S. Sun appears to be behind frosted glass. Other winds bring overcast sky.
Cumulus humillis
Fair weather clouds if they show no vertical development. Can build up and develop into cumulus congestus or cumulonimbus clouds.
Cumulus with vertical growth
Fair weather clouds building up vertically often indicate cumulus congestus and cumulonimbus, which bring afternoon showers
Cumulus Congestus
If clouds form from SW to NW, precipitation with gusty winds and thunderstorms or wind squalls are likely within 5 to 10 hours.
Cumulus Congestus
Cloud tops forming altocumulus cumulogenitus usually bring precipitation in 5-10 hours including gusty winds, thundershowers and wind squalls
Cumulus Congestus
If clouds form from SW to NW, precipitation with gusty winds and thunderstorms or wind squalls are likely within 5 to 10 hours.
Cumulonimbus
Precipitation likely and soon coming usually from SW W to N. Distant clouds often show an anvil-shaped cirroform cap
Cumulonimbus capillatus
Precipitation likely and soon coming usually from SW W to N. Distant clouds often show an anvil-shaped cirroform cap
Cumulonimbus calvus
Precipitation likely and soon coming usually from SW W to N. Distant clouds often show an anvil-shaped cirroform cap
Stratocumulus stratoformis
Immediate threat of bad weather from a sprinkle to heavy precipitation. If at head of a cold front - gusty winds or thundershower
Stratocumulus opacus
Immediate threat of bad weather from a sprinkle to heavy precipitation. If at head of cold front - gusty winds or thunder shower
Stratus
Winds from NE to S may bring heavy precipitation. Other winds may bring only a light drizzle or overcast sky
Cumulonimbus mamma
Seldom seen low to middle clouds associated with severe wind squalls, hail, heavy precipitation, tornadoes and thunderstorms
Nimbostratus
Rain or snow clouds. Precipitation of long duration if winds NE to S, or shorter duration if winds are SW W to N
Nimbostratus
Rain or snow clouds. Precipitation of long duration if winds NE to S, or shorter duration if winds are SW W to N
Cumulus congestus fracto stratus
Precipitation of long duration if winds from NE to S, or shorter with other winds
Cumulus fractus
Fair weather clouds broken up by strong winds. No precipitation unless winds steady NE to S, then cumulus fractus indicates bad weather
Stratocumulus at sunset
Low water clouds of dark indian red color. Precipitation in 12 to 20 hours if winds from NE to S. Other winds bring overcast sky.
Altocumulus and Cirrus at sunset
Middle water to ice clouds with brilliant white background. Precipitation likely within 20 to 24 hours if winds are from NE E to S
Stratocumulus at sunset
Low to middle water clouds with gold, pink, amber, lavender or rosy background. No precipitation likely within 20 -24 hours
Altocumulus
Good weather. Absence of winds means good weather will continue