Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Sun Jul 30 2017 Valid 12Z Sun Jul 30 2017 - 12Z Tue Aug 01 2017 ...A threat for flash flooding exists across the Southern High Plains... ...A slow-moving cold front will keep conditions wet across the state of Florida... ...Increasing warmth likely along the West Coast into next week... An active monsoonal flow regime will usher abundant tropical moisture into the Four Corners region the next couple of days. In addition to the enhanced moisture in the atmosphere, a number of mid-level disturbances will traverse the region aiding in the development of numerous thunderstorm complexes. Locally heavy rainfall is likely along the east facing slopes of the Southern/Central Rockies given sufficient upslope flow against the terrain. Some of the storms coming off of the mountains are forecast to be slow moving, thus enhancing the threat for flash flooding across the Southern High Plains. Through Tuesday morning, a widespread area of 2 to 3 inches of rainfall is expected along the New Mexico/Texas border. Highly amplified flow aloft across the eastern U.S. will help drag a frontal zone down into the Gulf of Mexico. While not unprecedented, boundaries do not often find themselves surging this far south in late July. This slow moving cold front will bring wet conditions for the state of Florida, particularly along the western/eastern coasts given local sea breeze enhanced convection. Given the surge of this boundary south of the Gulf Coast, cooler than normal temperatures are in the forecast over much of the central/eastern United States. The Gulf Coast can expect highs maximizing just below 90 degrees while slightly warmer weather should reside over Texas with highs in the low to potentially mid 90s. A building upper ridge along the West Coast will spread expansive heat to the region. In terms of anomalies, the largest departures from normal should be from northern California into the Pacific Northwest and Upper Intermountain West with readings around 10 degrees above climatology. Farther south, widespread highs between 100 and 110 degrees are likely across the interior central valleys of California into the Desert Southwest. Some monsoonal moisture squeaking into the latter region could increase cloud cover and thunderstorm chances which would limit the heat a bit. Rubin-Oster Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php