Light precipitation is falling. You determine that both rain and drizzle are present during your observation. Which symbol represents this situation?
Correct. Use weather symbol 58 for light rain mixed with drizzle. Encode this situation with -RA-DZ. 
Incorrect. Use weather symbol 58 for light rain mixed with drizzle. Encode this situation with -RA-DZ.
Over the last hour, rain has fallen consistently with moderate intensity. Which symbol represents this situation?
Correct. Symbol 63 depicts continuous moderate rain (individual drops are not easily seen). Encode this situation with RA. 
Incorrect. Symbol 63 depicts continuous moderate rain (individual drops are not easily seen). Encode this situation with RA.
Intense rain that falls in sheets and creates spray on pavement and surfaces has occurred for the past hour. Which symbol represents this situation?
Correct. Use weather symbol 65 for continuous heavy rain (rain in sheets). Encode this situation with +RA. 
Incorrect. Use weather symbol 65 for continuous heavy rain (rain in sheets). Encode this situation with +RA.
Cumulus clouds producing areas of rain in sheets have been passing over the station. Which symbol represents this situation?
Correct. Symbol 81 depicts a shower with moderate or heavy rain. Encode this situation with +SHRA. 
Incorrect. Symbol 81 depicts a shower with moderate or heavy rain. Encode this situation with +SHRA.
Moderate rain continues after a damaging thunderstorm ended nearly an hour ago. Which symbol represents this situation?
Correct. Symbol 91 depicts moderate or heavy rain, or showers of moderate or heavy rain at time of observation with a thunderstorm during the previous hour but not at time of observation. Encode this situation with RA, +RA, SHRA or +SHRA. 
Incorrect. Symbol 91 depicts moderate or heavy rain, or showers of moderate or heavy rain at time of observation with a thunderstorm during the previous hour but not at time of observation. Encode this situation with RA, +RA, SHRA or +SHRA.
A nearby thunderstorm has produced a large cloud of dust along the edge of its downdraft. In a few minutes it moves over your location and the visibility is reduced to 0.5 nm. Which symbol represents this situation?
Correct. Symbol 98 depicts a thunderstorm with duststorm or sandstorm at the time of observation. There must also be some sort of precipitation at the time of observation. Encode this situation with TSSA, +TSSA, TSDS or +TSDS. 
Incorrect. Symbol 98 depicts a thunderstorm with duststorm or sandstorm at the time of observation. There must also be some sort of precipitation at the time of observation. Encode this situation with TSSA, +TSSA, TSDS or +TSDS.
You see lightning but are not able to hear thunder from a distant storm. Which present weather symbol is used to indicate this situation?
Correct. Use weather symbol 13 if you are able to see lightning but do not yet hear thunderstorm. Encode VCTS in your observation. 
Incorrect. Use weather symbol 13 if you are able to see lightning but do not yet hear thunderstorm. Encode VCTS in your observation.
You can hear thunder in the distance but no precipitation is occurring at your station. Which present weather symbol and code describes this situation?
Correct. Use weather symbol 17 if you can hear thunder in the distance but no precipitation is occurring at your station. Encode VCTS in your observation. 
Incorrect. Use weather symbol 17 if you can hear thunder in the distance but no precipitation is occurring at your station. Encode VCTS in your observation.
Drizzle has affected your station over the past few hours, but stopped about 20 minutes ago. Which symbol represents this situation?
Correct. Symbol 20 depicts continuous drizzle that ended in the past hour. Encode this situation with DZ. 
Incorrect. Symbol 20 depicts continuous drizzle that ended in the past hour. Encode this situation with DZ.
It has rained most of the morning, but ended 45 minutes ago. Which symbol represents this situation?
Correct. Symbol 21 depicts continuous rain that ended in the past hour. Encode this situation with RA. 
Incorrect. Symbol 21 depicts continuous rain that ended in the past hour. Encode this situation with RA.
Steady drizzle has been occurring over the last hour and brought the visibility down to 1/2 mi. Which symbol represents this situation?
Correct. Use weather symbol 53 for continuous moderate drizzle, which has visibility from 5/16 mi to 5/8 mi. Encode this situation with DZ. 
Incorrect. Use weather symbol 53 for continuous moderate drizzle, which has visibility from 5/16 mi to 5/8 mi. Encode this situation with DZ.
During your observation, you determine that both rain and drizzle are falling at a moderate intensity. Which symbol represents this situation?
Correct. Use weather symbol 59 to depict moderate to heavy rain and drizzle mixed. Encode this situation with RADZ or +RADZ. 
Incorrect. Use weather symbol 59 to depict moderate to heavy rain and drizzle mixed. Encode this situation with RADZ or +RADZ.
Steady light rain has been falling all morning. Which symbol represents this situation?
Correct. Use weather symbol 61 to describe steady, light rain (individual drops are easily seen). Encode this situation with -RA. 
Incorrect. Use weather symbol 61 to describe steady, light rain (individual drops are easily seen). Encode this situation with -RA.
Light showers of rain have been passing over the observation area during the past hour. Which symbol represents this situation?
Correct. Symbol 80 depicts a light rain shower. Encode this situation with -SHRA. 
Incorrect. Symbol 80 depicts a light rain shower. Encode this situation with -SHRA.
Light rain continues after a thunderstorm ended approximately 30 minutes ago. Which symbol represents this situation?
Correct. Symbol 91 depicts light rain with a thunderstorm occurring in past hour, but not at time of observation. Encode this situation with -RA or -SHRA.
Incorrect. Symbol 91 depicts light rain with a thunderstorm occurring in past hour, but not at time of observation. Encode this situation with -RA or -SHRA.
A thunderstorm with moderate rain and wind gusts of 75 kt is occurring at your location. No hailstones or pellets have been observed. Which symbol represents this situation?
Correct. Symbol 97 depicts a severe thunderstorm without hail or pellets. Rain or snow that occurs in conjunction with the storm may be of any intensity. Encode this situation with +TSRA or +TSSN. 
Incorrect. Symbol 97 depicts a severe thunderstorm without hail or pellets. Rain or snow that occurs in conjunction with the storm may be of any intensity. Encode this situation with +TSRA or +TSSN.
A thunderstorm developed near your location and is now producing 1" hail and gusts of 55 kt. Which symbol represents this situation?
Correct. Symbol 99 depicts a severe thunderstorm with hail, ice pellets or snow pellets at the time of observation. Encode this situation with +TSGR, +TSPE or +TSGS, respectively. 
Incorrect. Symbol 99 depicts a severe thunderstorm with hail, ice pellets or snow pellets at the time of observation. Encode this situation with +TSGR, +TSPE or +TSGS, respectively.
Rain is seen in the distance reaching the sea surface. You estimate that it is 4 miles from the ship. Which present weather symbol describes this situation?
Correct. Weather symbol 15 is used when precipitation is observed reaching the ground away from the observing site at a distance of 3 or more miles. Encode the observation using VCSH. 
Incorrect. Weather symbol 15 is used when precipitation is observed reaching the ground away from the observing site at a distance of 3 or more miles. Encode the observation using VCSH.
For most of the day, winds have been ~10 knots from the west. About 15 minutes ago, winds suddenly increased to 24-26 knots, sustained over an 8-minute period. Your most recent observations show wind speeds of ~15 knots. Which present weather symbol and code describes the situation that occurred?
Correct. Use weather symbol 18 to denote squalls, which are sudden increase in wind to speeds greater than 16 kts with sustained values for at least two minutes, followed by a sudden decrease in speeds. Encode this as SQ. 
Incorrect. Use weather symbol 18 to denote squalls, which are sudden increase in wind to speeds greater than 16 kts with sustained values for at least two minutes, followed by a sudden decrease in speeds. Encode this as SQ.
A brief shower of rain moved through the station half an hour ago. Which symbol represents this situation?
Correct. Symbol 25 depicts a rain shower that occurred in the last hour. Encode this situation with SHRA. 
Incorrect. Symbol 25 depicts a rain shower that occurred in the last hour. Encode this situation with SHRA.
Light drizzle has been falling on and off over the last hour. Which symbol represents this situation?
Correct. Use weather symbol 50 to depict light (visibility greater than 5/8 mi or 0.55 nm) intermittent drizzle. Encode this situation with -DZ. 
Incorrect. Use weather symbol 50 to depict light (visibility greater than 5/8 mi or 0.55 nm) intermittent drizzle. Encode this situation with -DZ.
Drizzle has started and stopped several times over the past hour, and reduced the visibility to 1/4 mi at the time of observation. Which symbol represents this situation?
Correct. Use weather symbol 54 for intermittent heavy drizzle (visibility less than or equal to 1/4 mi). Encode this situation with +DZ. 
Incorrect. Use weather symbol 54 for intermittent heavy drizzle (visibility less than or equal to 1/4 mi). Encode this situation with +DZ.
Drizzle has been steady all afternoon causing visibility to degrade to ⅛ mi at the time of observation. Which symbol represents this situation?
Correct. Use weather symbol 55 for continuous heavy drizzle (visibility less than or equal to 1/4 mi). Encode this situation with +DZ. 
Incorrect. Use weather symbol 55 for continuous heavy drizzle (visibility less than or equal to 1/4 mi). Encode this situation with +DZ.
Light rain is occurring when you go out to take the observation and has been reported occasionally over the last hour. Which symbol represents this situation?
Correct. Use weather symbol 60 to depict light intermittent rain (individual drops are easily seen). Encode this situation with -RA. 
Incorrect. Use weather symbol 60 to depict light intermittent rain (individual drops are easily seen). Encode this situation with -RA.
While taking your observation, rain picks up to moderate intensity although it has been sporadic during the last hour. Which symbol represents this situation?
Correct. Use weather symbol 62 to describe intermittent moderate intensity rain (individual drops are not easily seen). Encode this situation with RA. 
Incorrect. Use weather symbol 62 to describe intermittent moderate intensity rain (individual drops are not easily seen). Encode this situation with RA.
Rain has been falling in sheets sporadically as the rainbands of a hurricane pass over your location. Which symbol represents this situation?
Correct. Use weather symbol 64 for intermittent heavy rain (rain in sheets). Encode this situation with +RA. 
Incorrect. Use weather symbol 64 for intermittent heavy rain (rain in sheets). Encode this situation with +RA.
Nearby cumulus clouds have been producing rain on and off for most of the day. It is now pouring at the station and rainfall rates are estimated at 1.5 inches an hour. Which symbol represents this situation?
Correct. Use weather symbol 82 represent a violent rain shower with rainfall rates of at least 1 inch per hour. Encode this situation with +SHRA. 
Incorrect. Use weather symbol 82 represent a violent rain shower with rainfall rates of at least 1 inch per hour. Encode this situation with +SHRA.
A thunderstorm has been producing moderate rain but no observable hail or pellets at your location for the past 30 minutes. Which symbol represents this situation?
Correct. Symbol 95 depicts a thunderstorm with rain or snow but without hail or pellets. The rain or snow may be of any intensity. Encode this situation with TSRA or TSSN. 
Incorrect. Symbol 95 depicts a thunderstorm with rain or snow but without hail or pellets. The rain or snow may be of any intensity. Encode this situation with TSRA or TSSN.
In the distance you can see virga, which is precipitation that is not reaching the ground. Which present weather symbol describes this situation?
Correct. Use weather symbol 14 for virga. If the virga is associated with thunderstorms, encode these as VCTS in your observation. VIRGA should also be included in the remarks section of the observation with the direction from the station if applicable. 
Incorrect. Use weather symbol 14 for virga. If the virga is associated with thunderstorms, encode these as VCTS in your observation. VIRGA should also be included in the remarks section of the observation with the direction from the station if applicable.
At your observation point you are not experiencing any precipitation but are able to observe precipitation falling to the surface not far from the ship. Which present weather symbol and code describes this situation?
Correct. Use weather symbol 16 in the case when precipitation is falling near to, but not at, your station. Encode it as VCSH. 
Incorrect. Use weather symbol 16 in the case when precipitation is falling near to, but not at, your station. Encode it as VCSH.
A waterspout is visible in the distance. Which present weather symbol and code describes this situation?
Correct. Symbol 19 depicts a waterspout, tornado or funnel cloud that is either occurring at the station or some distance away during the preceding hour. Encode this situation with FC for a funnel cloud, or +FC for a waterspout or tornado in your observation. If a tornado is observed, also include plain language word TORNADO in the comments. 
Incorrect. Symbol 19 depicts a waterspout, tornado or funnel cloud that is either occurring at the station or some distance away during the preceding hour. Encode this situation with FC for a funnel cloud, or +FC for a waterspout or tornado in your observation. If a tornado is observed, also include plain language word TORNADO in the comments.
A thunderstorm moved over the station about 30 minutes ago, leaving a double rainbow upon its exit from the area. Which symbol represents this situation?
Correct. Use weather symbol 29 to depict a thunderstorm, with or without precipitation, that ended in the past hour. Encode this situation with TS. 
Incorrect. Use weather symbol 29 to depict a thunderstorm, with or without precipitation, that ended in the past hour. Encode this situation with TS.
Drizzle has been occurring over the past hour and is continuing during the observation, reducing visibility to around 2 miles. Which symbol represents this situation?
Correct. Use weather symbol 51 to describe steady, light drizzle with visibility greater than 5/8 mi. Encode this situation with -DZ. 
Incorrect. Use weather symbol 51 to describe steady, light drizzle with visibility greater than 5/8 mi. Encode this situation with -DZ.
Drizzle has been occurring off an on during the past hour, and reduced the visibility to half a mile at the time of observation. Which symbol represents this situation?
Correct. Use weather symbol 52 to describe intermittent moderate intensity drizzle (visibility is 5/16 mi to 5/8 mi). Encode this situation with DZ. 
Incorrect. Use weather symbol 52 to describe intermittent moderate intensity drizzle (visibility is 5/16 mi to 5/8 mi). Encode this situation with DZ.