Tropical Moisture Will Bring Heavy to Excessive Rainfall with Possible Flooding This Week

Tropical moisture from the remnants of Odalys and Hurricane Polo will surge over the southwest into the central U.S. this week with several days of heavy to excessive rainfall which may bring limited to considerable flooding. Flood Watches have been issued through Wednesday in the southwest U.S. and moderate risk outlooks have been issued today through Thursday. Read More >

Isentropic Surfaces

Unsaturated air parcels move along isentropic surfaces thus allowing a conceptually easy way to identify airstreams and to visualize regions of rising and sinking air. However, the convenience of isentropic analysis is diminished when latent heat is released by the condensation of moisture. The release of latent heat in an ascending saturated air parcel causes the parcel to leave the isentropic surface and to move upward with respect to the surface (Moore 1993, p. 9)

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