090 FXUS01 KWBC 140809 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Tue Apr 14 2026 Valid 12Z Tue Apr 14 2026 - 12Z Thu Apr 16 2026 ...Rounds of strong to severe thunderstorms with heavy rain across the Southern/Central Plains and from the Upper Midwest to the Great Lakes during the next couple of days... ...Heavy mountain snow, windy and much colder weather will push into the Northwest on Wednesday, reaching into the northern Rockies by Thursday morning... ...Record warmth expected to overspread the east-central U.S. to the Mid-Atlantic... ...Critical fire weather risk over the central to Southern High Plains... A frontal boundary extending across the northern tier states is forecast to undulate as multiple low pressure waves ride along the front through the next couple days. A couple of the stronger waves are expected to trigger rounds of severe weather along with heavy rainfall from the Upper Midwest to the Great Lakes. These storms will likely become daily occurrence during the latter half of each day as they generally move from west to east across the aforementioned areas along the undulating front. The interior Northeast will also see a couple of rounds of showers and thunderstorms in the latter half of today and Wednesday. Further south in the central/southern Plains, additional moisture returning from the Gulf will interact with a dryline to trigger additional rounds of strong to possibly severe thunderstorms with heavy downpours. These storms are expected to extend northeast across Missouri into the Midwest, again most active during the latter half of each day into the overnight hours. The strong ridge of high pressure that helps feeding the moisture into the southern Plains will also bring anomalous warmth into the eastern U.S. High temperatures well into the 80s will begin to challenge daily records this afternoon in the east-central U.S. By Wednesday afternoon, record heat with temperatures reaching into the 90s are forecast for the Mid-Atlantic region. More record heat is forecast to continue into Thursday for the Mid-Atlantic. In the western U.S., high-elevation snow and low-elevation rain associated with an upper low will move through the Four Corners and then the central Rockies today. Meanwhile, a stronger system is approaching the Pacific Northwest. Heavy mountain snow, windy and much colder weather associated with this system will push into the Northwest on Wednesday, reaching into the northern Rockies and northern Great Basin by Thursday morning behind a strong cold front. As the warm air expands eastward from the Plains to the eastern U.S. over the next couple of days, a cooling trend will gradually work its way across the interior western U.S. with the ongoing unsettled weather. West of the aforementioned dryline in the Plains, a combination warm temperatures, dry air and some gusty winds will promote a Critical Risk of fire weather over the central to southern High Plains and nearby southern Rockies over the next couple of days. Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$  455 FXHW01 KWNH 140845 PMDHI Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 445 AM EDT Tue Apr 14 2026 Valid 00Z Wed 15 Apr 2026 - 00Z Wed 22 Apr 2026 PW values are expected to remain above average through much of the upcoming forecast period. This will be from a combination of above average PW along the weakening shear line emanating southward from the strong closed low initially near 38N 162W and additional high PW to the east of a new upper trof forming west of the Island along approx 170W late in the week. The trades that have been disrupted significantly lately with this stalled front/shear line, will begin to return to more normal by the end of this week and into the weekend as surface high pressure builds to the north of the state near 40-45N and the stalled front/shear line dissipates. By early next week, it appears the trades will again weaken as the high to the north of the Islands pushes farther east and upstream troffing forming initially along 170W, begins to push eastward. The latest model consensus is for less organized precipitation late week and into the weekend, with more typical trade precipitation distributions. By late weekend into early next week, the new upstream trof along 170W will begin to favor more enhanced larger scale precip areas forming west of the Islands. Eventually some of these more organized precip areas may push eastward in the Monday to Wednesday time frame from west to east as the aforementioned new trof forming along 170W is pushed eastward by upstream height falls. There is a lot of model spread here with qpf details. The GFS is the most emphatic about pushing an organized area of heavy rains across the Islands Mon-Wed, while the AIGFS does not follow. At the moment, believe there will be increased large scale precip chances given the upstream height falls approaching the state and the above average PW in place. Oravec