A one-digit number that best describes the lightning situation from midnight yesterday to midnight last night. A one-digit code that best describes the lightning activity from midnight last night to basic observation time today. No thunderstorms or building cumulus clouds observed. 2 Infrequent lightning. A single to a few building cumulus clouds with only an occasional one reaching thunderstorm intensity.
Thunderstorms are common, occasionally obscuring the sky.
Moderate to heavy rainfall with the thunderstorms and light to moderate rainfall preceding and following the storm. Lightning of all kinds occurs frequently and is characteristically persistent during the storm. Scattered towering clouds with a few thunderstorms. Reported either as the degrees or the alpha code from which the wind is blowing at the time of the observation. RAWS stations default to degrees.