Prognostic Meteorological Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2
000 FXUS01 KWBC 010754 PMDSPD SHORT RANGE FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 353 AM EDT SAT OCT 01 2016 VALID 12Z SAT OCT 01 2016 - 12Z MON OCT 03 2016 ...WIDESPREAD SHOWERS AND THUNDERSTORMS CONTINUES ACROSS THE OHIO VALLEY, MID-ATLANTIC, AND NORTHEAST THIS WEEKEND... ...SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED AHEAD OF A FRONTAL BOUNDARY ACROSS THE INTERMOUNTAIN WEST AND THE ROCKIES... SHOWERS AND THUNDERSTORMS WILL PERSIST ACROSS MUCH OF THE EASTERN SEABOARD THIS WEEKEND ALONG A SPRAWLING FRONT. THE SPINNING UPPER-LEVEL LOW ASSOCIATED WITH THIS SURFACE FEATURE WILL FINALLY MOVE NORTHEASTWARD BY SUNDAY AS A RIDGE OF HIGH PRESSURE CROSSES THE CENTRAL CONUS - ALLOWING THE SURFACE FRONT TO PUSH OFFSHORE. THE HEAVIEST RAINFALL WILL BE LOCATED ALONG AND NORTH OF THE OCCLUDED FRONT, WHICH WILL BE OVER THE LOWER GREAT LAKES/NORTHERN MID-ATLANTIC REGION. ANTECEDENT RAINFALL ACROSS PORTIONS OF THE EAST COAST COMBINED WITH THE PROBABILITY OF ADDITIONAL RAINFALL WITH KEEP LOCALIZED FLASH FLOODING A THREAT. MUCH OF THE INTERMOUNTAIN WEST WILL HAVE SHOWERS AND THUNDERSTORMS OVER THE NEXT COUPLE OF DAYS AS A COLD FRONT SLOWLY CROSSES THE ROCKIES AND INTO THE ADJACENT HIGH PLAINS. A STEADY STREAM OF GULF MOISTURE TRAVELING NORTHWARD WILL INTERACT WITH THIS SYSTEM, YIELDING HIGHER THAN NORMAL PRECIPITATION ACROSS PORTIONS OF MONTANA AND THE DAKOTAS BY EARLY NEXT WEEK. SNOW WILL BE POSSIBLE AT HIGHER ELEVATIONS OF THE CASCADES, SAWTOOTHS, ABSAROKAS, BEARTOOTHS AND THE TETONS. RAIN WILL STEADILY INCREASE ACROSS THE PACIFIC NORTHWEST AS THE UPPER LEVEL SYSTEM APPROACHES THE WEST COAST. HEAVY RAINFALL IS POSSIBLE ALONG THE COASTAL RANGES OF NORTHERN CALIFORNIA AND SOUTHWEST OREGON THIS EVENING INTO SUNDAY. CAMPBELL GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_WBG.PHP $$

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.