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21Sudan — This article is about the country. For the geographical region, see Sudan (region). For the state that seceded from Sudan, see South Sudan. For other uses, see Sudan (disambiguation). Republic of the Sudan جمهورية السودان Jumhūrīyat as Sūdān …
22Geography of Sudan — The cities, towns and selected villages of Sudan and South Sudan Satellite image of Sudan …
23Fog — For other uses, see Fog (disambiguation). Part of the Nature series on Weather   Calendar seasons Spring  …
24List of severe weather phenomena — Severe weather phenomena are weather conditions that are hazardous to human life and property. Examples Include: Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture… …
25Squall line — [ thumb|right|200 px|Cyclonic vortex over Pennsylvania with a trailing squall line.] A squall line is a line of severe thunderstorms that can form along and/or ahead of a cold front. In the early 20th century, the term was used as a synonym for… …
26Downburst — The curl phase soon after an intense microburst impacted the surface Downburs …
27Late-May 1998 Tornado Outbreak and Derecho — The Late May 1998 Tornado Outbreak and Derecho was a historic tornado outbreak and derecho that began on the afternoon of May 30 extending throughout May 31, 1998, across a large portion of the northern half of the United States and southern… …
28Word of the year — The word(s) of the year, sometimes capitalized as Word(s) of the Year and abbreviated WOTY or WotY, refers to any of various assessments as to the most important word(s) or expression(s) in the public sphere during a specific year. Contents 1… …
29Khamsin — For the car, see Maserati Khamsin. Khamsin in hieroglyphs …
30Weather front — A weather front is a boundary separating two masses of air of different densities, and is the principal cause of meteorological phenomena. In surface weather analyses, fronts are depicted using various colored lines and symbols, depending on the… …
