Potential RGV rainfall, June 6 through 8, 2008 (click to enlarge) Synoptic forecast for 7 PM, June 6th, showing easterly wave and pressure systems (click to enlarge)
Welcome Rains This Weekend?
Subtle pattern change should bring some relief

After rain free conditions since May 17th, including a nice period of sunny skies and relatively light winds, despite notable heat, a series of relatively weak, but notable, easterly waves will slide around a strengthening upper level ridge of high pressure (upper right) building into the southeast U.S., transporting deep tropical moisture into at least the Lower Rio Grande Valley, beginning during the afternoon or evening of June 6th and continuing into June 8th, and perhaps beyond.

The combination of the disturbances with the thickening moisture will allow isolated to scattered showers to move onshore sometime on Friday, and perhaps increase in coverage and intensity by Friday evening, with off and on showers and perhaps a thunderstorm continuing Saturday and Sunday, and perhaps beyond. How much rain falls at any one location remains quite uncertain; however, the potential for more intense cells to drop an inch or more of rain in a short period of time does exist. Should this occur, particularly over urban areas with poor drainage, minor flooding may develop.

The best chances for heavier rainfall will be in the populated eastern portion of the Lower Rio Grande Valley, including Harlingen and Brownsville but perhaps extending up river toward Weslaco, McAllen, Pharr, and Mission (upper left).

Please continue to monitor this website for further information as the situation develops into this weekend.

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