Verkkoreviews the hazards associated with thunderstorms, including winds, rain, hail, and lightning. Also reviews the development of thunderstorms, where thunderstorms. Verkkowhile flash floods only last a few hours, floods (or monsoon floods) might linger for a week or longer before returning to normal water flow levels. Verkkosee lightning strikes in real time across the planet. Free access to maps of former thunderstorms. By blitzortung. org and contributors. Verkkowhat is the difference between a flood watch and a flood warning issued by the national weather service? Verkkothe flash eu funded project aims to observe, analyze and model lightning activity in thunderstorms for use in short term forecasting of flash floods.