344 FXUS06 KWBC 121902 PMDMRD Prognostic Discussion for 6 to 10 and 8 to 14 day outlooks NWS Climate Prediction Center College Park, MD 300 PM EDT Fri June 12 2026 6-10 DAY OUTLOOK FOR JUN 18 - 22 2026 The 0Z ECMWF, GEFS, and Canadian ensemble means are in reasonably good agreement on the predicted highly amplified 500-hPa mean circulation pattern across the North American domain and surrounding regions during the 6-10 day period, and are consistent on underlying variations in the pattern through the period. The manual height blend is based on ensemble means, weighting the ECMWF model stronger due to its recent higher anomaly correlation skill. The manual blend indicates an unseasonably strong trough with negative 500-hPa anomalies predicted across the north-central and northeastern Contiguous U.S. (CONUS). Anomalous ridging with above-normal 500-hPa heights begins to build across the Aleutians extending southeastward toward the western CONUS. Above-normal 500-hPa heights are also forecast over Alaska. Near normal heights are forecast across Hawaii in close proximity to a predicted mid-level closed low. Below normal temperatures are favored across most of the north-central and northeastern CONUS, due to the unseasonably strong trough early in the period. Confidence is high (greater than 60 percent chance) for below normal temperatures across parts of northeastern North Dakota and northern Minnesota, near the predicted trough axis. Above normal temperatures are more likely ahead of this trough across parts of the Southeast and adjacent areas of the East and Gulf Coasts. Confidence is high (greater than 70 percent chance) for above normal temperatures across the southern half of the Florida Peninsula where above normal mid-level heights are most likely. Above normal temperatures are also favored across much of the western CONUS, associated with transient ridging early in the period. In contrast, below normal temperatures are favored for much of southwestern Mainland Alaska underneath anomalous northwesterly flow. A modest tilt toward above normal temperatures is indicated for the northern and eastern Mainland, associated with rising mid-level heights. Above normal temperatures are favored for Hawaii consistent with observed above normal sea surface temperatures in the adjacent Pacific. Above-normal precipitation is forecast over most of the CONUS due to the anomalous trough predicted over the east-central CONUS and potential frontal forcing and enhanced moisture advection from the Gulf early in the period. Confidence is high (greater than 50 percent chance) for above normal precipitation for small portions of southern Arizona and southwestern New Mexico, supported by most of the dynamical precipitation forecast tools. In contrast, a tilt toward below normal precipitation is indicated across parts of the Pacific Northwest and southern Florida Peninsula, associated with anomalous ridging early in the period. A modest tilt toward above normal precipitation is indicated for most of northeastern Mainland Alaska, consistent with most of the dynamical precipitation forecast tools. A drying trend is favored for parts of southwestern Mainland Alaska and the Aleutians as well as Southeast Alaska, as anomalous ridging builds across the Aleutians. Slightly enhanced probabilities of above normal precipitation are indicated across Hawaii, associated with a nearby closed mid-level low. The official 6-10 day 500-hPa height blend consists of 30% of Today's 6z GFS Ensemble Mean centered on Day 8, 40% of Today's 0z European Ensemble Mean centered on Day 8, and 30% of Today's 0z Canadian Ensemble Mean centered on Day 8 FORECAST CONFIDENCE FOR THE 6-10 DAY PERIOD: Above average, 4 on a scale of 1-5, due to reasonably good agreement among the various height and temperature guidance, offset somewhat by differences in precipitation tools. 8-14 DAY OUTLOOK FOR JUN 20 - 26 2026 A transitional 500-hPa pattern is forecast across much of North America and vicinity during the week-2 period as the pattern de-amplifies significantly. The period begins with a weakening trough centered over the Great Lakes. This trough quickly de-amplifies further as time progresses such that the flow becomes mostly zonal by the end of week-2. As this trough weakens, above normal heights are generally forecast to expand in coverage across the Southeast and eventually the Plains. Meanwhile, a trough is forecast to rotate into the Pacific Northwest from Southeast Alaska. Conversely, ridging is forecast to build upstream over the Aleutians and the Bering Sea, with above normal heights overspreading most of Alaska as time progresses. Mid-level troughing and near normal mid-level heights are forecast near or over Hawaii. With early troughing forecast to rapidly weaken, below normal temperatures are forecast over parts of the Northern Plains extending eastward to the Upper Mississippi Valley, the Great Lakes, and the Northeast. As this trough weakens, above normal temperatures are favored across the Southeast, as ridging strengthens toward the middle of the period. Confidence is high (greater than 60 percent chance) for above normal temperatures across the southern and central Florida Peninsula, underneath associated above normal mid-level heights. Later in the period, anomalous ridging is forecast to build into the central CONUS, resulting in increased chances of above normal temperatures across much of the remainder of the southern and western half of the CONUS. Near to above normal temperatures are favored for most of Alaska, as mid-level heights are forecast to rise as the period progresses. Above normal temperatures are favored for Hawaii, due in part to above normal SSTs in the adjacent Pacific. Above-normal precipitation is forecast over most of the CONUS associated with a departing anomalous trough and enhanced moisture flow from the Gulf due to surface low pressure predicted to develop over the central High Plains early in the period, supported by most of the dynamical precipitation forecast tools. Conversely, slightly below normal precipitation is favored for the southern Florida Peninsula associated with predicted anomalous ridging and above-normal 500-hPa heights. Above normal precipitation is favored for northeastern Alaska associated with potential surface low pressure development over or near the southeastern Mainland. Below normal precipitation is favored for southwestern Alaska and the Aleutians, associated with strong mid-level ridging predicted over the Aleutians. A slight tilt toward above normal precipitation is indicated for Hawaii, associated with mid-level troughing in the vicinity of the state. The official 8-14 day 500-hPa height blend consists of: 30% of Today's 6z GFS Ensemble Mean centered on Day 11, 40% of Today's 0z European Ensemble Mean centered on Day 11, and 30% of Today's 0z Canadian Ensemble Mean centered on Day 11 FORECAST CONFIDENCE FOR THE 8-14 DAY PERIOD: Below average, 2 on a scale of 1-5, due to increased uncertainty associated with a predicted transitional pattern. FORECASTER: Luke H Notes: The notation for the categorical forecast indicated on the maps is the same as that in the tables: A-above N-near normal B-below The temperature map shows regions with > 33% chance of being warmer (orange, "A"), colder (blue, "B"), or close to (gray, "N") normal. Labels on the shaded lines give the probability (> 33%) of the more likely category (B or A). Probability of N is always < 40%. The precipitation map shows regions with > 33% chance of being wetter (green, "A"), drier (tan, "B"), or close to (gray, "N") normal. Labels on the shaded lines give the probability (> 33%) of the more likely category (B or A). Probability of N is always < 40%. In the southwest and other climatologically dry regions - there will be a greater than 33.3% chance of no precipitation and occasionally even a normal (i.e. Median) value of zero - especially during the dry seasons. In such cases a forecast of near normal is effectively a forecast of little or no precipitation. The climate prediction center uses 1991-2020 base period means as reference in the climate outlooks. The next set of long-lead monthly and seasonal outlooks will be released on June 18. Analogs to the 5 day mean observed pattern centered 3 days ago (D-3) for the region from 20N to 70N latitude and 175E to 60W longitude include the 5 day periods centered on the following dates: 19980626 - 20220614 - 20230619 - 20120618 - 20010614 Analogs to the 7 day mean observed pattern centered 4 days ago (D-4) for the region from 20N to 70N latitude and 175E to 60W longitude include the 7 day periods centered on the following dates: 19980625 - 20230619 - 20140525 - 20120618 - 20180612 6-10 DAY OUTLOOK TABLE Outlook for Jun 18 - 22 2026 STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN WASHINGTON A N OREGON A N NRN CALIF A N SRN CALIF A N IDAHO A A NEVADA A N W MONTANA A A E MONTANA B A WYOMING A A UTAH A A ARIZONA A A COLORADO A A NEW MEXICO A A N DAKOTA B A S DAKOTA B A NEBRASKA B A KANSAS B A OKLAHOMA A A N TEXAS A A S TEXAS A A W TEXAS A A MINNESOTA B N IOWA B A MISSOURI B A ARKANSAS A A LOUISIANA A A WISCONSIN B A ILLINOIS B A MISSISSIPPI A A MICHIGAN B A INDIANA B A OHIO B A KENTUCKY N A TENNESSEE A A ALABAMA A A NEW YORK B A VERMONT B A NEW HAMP B A MAINE B A MASS B A CONN B A RHODE IS B A PENN B A NEW JERSEY B A W VIRGINIA N A MARYLAND N A DELAWARE N A VIRGINIA A A N CAROLINA A A S CAROLINA A A GEORGIA A A FL PNHDL A N FL PENIN A N AK N SLOPE A A AK ALEUTIAN N B AK WESTERN A B AK INT BSN A A AK S INT A N AK SO COAST A B AK PNHDL A B 8-14 DAY OUTLOOK TABLE Outlook for Jun 20 - 26 2026 STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN WASHINGTON A A OREGON A N NRN CALIF A N SRN CALIF A N IDAHO A A NEVADA A N W MONTANA A A E MONTANA N A WYOMING A A UTAH A A ARIZONA A A COLORADO A A NEW MEXICO A A N DAKOTA B A S DAKOTA B A NEBRASKA N A KANSAS N A OKLAHOMA A A N TEXAS A A S TEXAS A A W TEXAS A A MINNESOTA B A IOWA B A MISSOURI B A ARKANSAS A A LOUISIANA A N WISCONSIN B A ILLINOIS B A MISSISSIPPI A A MICHIGAN B A INDIANA B A OHIO B A KENTUCKY B A TENNESSEE N A ALABAMA A A NEW YORK B A VERMONT B N NEW HAMP B N MAINE B N MASS B A CONN B A RHODE IS B A PENN B A NEW JERSEY B A W VIRGINIA B A MARYLAND B A DELAWARE B A VIRGINIA N A N CAROLINA A A S CAROLINA A A GEORGIA A N FL PNHDL A N FL PENIN A N AK N SLOPE A N AK ALEUTIAN N N AK WESTERN A N AK INT BSN A N AK S INT A N AK SO COAST A N AK PNHDL A N LEGEND TEMPS WITH RESPECT TO NORMAL PCPN WITH RESPECT TO MEDIAN A - ABOVE N - NEAR NORMAL A - ABOVE N - NEAR MEDIAN B - BELOW B - BELOW THE FORECAST CLASSES REPRESENT AVERAGES FOR EACH STATE. NORMAL VALUES - WHICH MAY VARY WIDELY ACROSS SOME STATES - ARE AVAILABLE FROM YOUR LOCAL WEATHER SERVICE FORECAST OFFICE. FOR ADDITIONAL INFORMATION SEE MESSAGE FXUS06 KWBC - ON AWIPS AS PMDMRD. $$