633  
FXUS06 KWBC 081902  
PMDMRD  
PROGNOSTIC DISCUSSION FOR 6 TO 10 AND 8 TO 14 DAY OUTLOOKS  
NWS CLIMATE PREDICTION CENTER COLLEGE PARK, MD  
300 PM EDT WED OCTOBER 08 2025  
 
6-10 DAY OUTLOOK FOR OCT 14 - 18 2025  
 
TODAY'S DYNAMICAL MODELS ARE IN RELATIVELY GOOD AGREEMENT IN PREDICTING AN  
AMPLIFIED 500-HPA CIRCULATION PATTERN ACROSS MUCH OF THE FORECAST DOMAIN. A  
MODERATELY DEEP, ANOMALOUS TROUGH IS FORECAST TO EXTEND SOUTHWESTWARD FROM THE  
ARCTIC OCEAN ACROSS NORTHERN AND WESTERN ALASKA, EASTERN SIBERIA, THE BERING  
SEA, AND NEARBY NORTHERN PACIFIC OCEAN. A STRONG ANOMALOUS RIDGE WITH  
ASSOCIATED POSITIVE HEIGHT ANOMALIES IS PREDICTED OVER THE EASTERN PACIFIC  
(INCLUDING THE GULF OF ALASKA), WITH THE LARGEST POSITIVE ANOMALIES LOCATED IN  
THE GENERAL VICINITY OF 50N/140W. AS TIME PROGRESSES, THIS RIDGE IS FORECAST TO  
BREAK DOWN AS THE FLOW BECOMES MORE ZONAL. DOWNSTREAM, A MODERATELY STRONG  
MID-LEVEL TROUGH IS FORECAST NEAR THE WEST COAST OF THE CONTIGUOUS U.S.  
(CONUS). FARTHER EAST, RIDGING AND ASSOCIATED ABOVE NORMAL HEIGHTS ARE  
PREDICTED OVER THE CENTRAL AND MOST OF THE EASTERN CONUS WEST OF THE  
APPALACHIANS, WITH THE LARGEST POSITIVE DEPARTURES OVER MOST OF THE MISSISSIPPI  
VALLEY AND GREAT PLAINS. A MID-LEVEL TROUGH IS FORECAST JUST OFF THE ATLANTIC  
COAST, WHICH IS STRONGER IN TODAY'S MODEL RUNS THAN IT WAS IN YESTERDAY'S RUNS.  
NEAR NORMAL HEIGHTS CONTINUE TO BE FORECAST FOR HAWAII BY TODAY'S ENSEMBLE  
MEANS.  
 
BELOW NORMAL TEMPERATURES ARE FAVORED ACROSS MOST OF THE WESTERN QUARTER OF THE  
CONUS DUE TO THE PROXIMITY OF A PREDICTED TROUGH. DOWNSTREAM RIDGING AND  
POSITIVE HEIGHT ANOMALIES ELEVATE THE CHANCES OF ABOVE NORMAL TEMPERATURES  
ACROSS MUCH OF THE REMAINDER OF THE LOWER 48 STATES. THERE ARE SOME DIFFERENCES  
IN THE REFORECAST TEMPERATURE TOOLS NEAR THE EAST COAST, WITH THE GEFS BEING  
THE WARMEST SOLUTION, FOLLOWED BY THE ECENS AND THEN CMCE, WITH THE LATTER  
FEATURING A MIX OF BELOW, NEAR, AND ABOVE NORMAL TEMPERATURES EAST OF THE  
APPALACHIANS. THE CONSOLIDATED TEMPERATURE TOOL PROVIDES A REASONABLE  
COMPROMISE BETWEEN THE GEFS AND ECENS SOLUTIONS, WHILE THE MAJORITY OF THE RAW  
AND BIAS-CORRECTED TEMPERATURES FAVOR A SOMEWHAT COOLER SOLUTION FOR THE  
ATLANTIC COAST STATES. MAXIMUM CHANCES FAVORING ABOVE NORMAL TEMPERATURES  
EXCEED 80 PERCENT OVER THE SOUTHERN PLAINS. ABOVE NORMAL TEMPERATURES ARE  
FAVORED ACROSS MOST OF ALASKA DUE TO PREDICTED ENHANCED SOUTHWESTERLY ONSHORE  
FLOW BETWEEN A TROUGH OVER THE BERING SEA AND WESTERN ALASKA AND A RIDGE OVER  
THE GULF OF ALASKA AND SOUTHEAST ALASKA. ABOVE NORMAL TEMPERATURES ARE LIKELY  
FOR HAWAII (PARTICULARLY THE WESTERN AND CENTRAL ISLANDS), CONSISTENT WITH  
ABOVE NORMAL SEA-SURFACE TEMPERATURES (SSTS) IN THE ADJACENT PACIFIC OCEAN.  
 
WETTER-THAN-NORMAL CONDITIONS CONTINUE TO BE FAVORED OVER MUCH OF THE WESTERN  
AND NORTH-CENTRAL CONUS. THIS IS DUE TO THE PROXIMITY OF A SIGNIFICANT  
MID-LEVEL TROUGH FORECAST NEAR THE WEST COAST, AND THE PREDICTED INFLUX OF  
TROPICAL MOISTURE FROM THE EASTERN PACIFIC ASSOCIATED WITH THE REMNANTS OF AT  
LEAST ONE, AND POSSIBLY TWO TROPICAL SYSTEMS (FROM WHAT IS CURRENTLY TROPICAL  
STORM PRISCILLA AND THE DEVELOPING SYSTEM BEHIND IT). THIS POSSIBILITY IS MOST  
LIKELY TO OCCUR JUST PRIOR TO, AND DURING THE EARLY STAGES OF, THE 6-10 PERIOD.  
THE NORTH-CENTRAL CONUS IS FORECAST TO BE INFLUENCED BY LOW PRESSURE MOVING  
ACROSS CENTRAL CANADA, WITH ITS ASSOCIATED TRAILING COLD FRONT TAPPING INTO  
MOISTURE STREAMING OUT THE SOUTHWEST U.S. CHANCES OF ABOVE NORMAL PRECIPITATION  
PEAK OVER 60 PERCENT ACROSS CENTRAL SECTIONS OF CALIFORNIA. A LOW PRESSURE  
SYSTEM PREDICTED OFF THE UPPER MID-ATLANTIC COAST EARLY IN THE FORECAST PERIOD  
IS EXPECTED TO SLOWLY TRACK NORTHEASTWARD, SPREADING WRAPAROUND PRECIPITATION  
ACROSS THE NORTHEAST COASTAL PLAIN, BEFORE DEPARTING THE REGION. THEREFORE,  
ABOVE NORMAL PRECIPITATION IS FAVORED FOR NEW ENGLAND, WITH NEAR NORMAL  
PRECIPITATION OVER NEW YORK STATE, NEW JERSEY, AND EASTERN PENNSYLVANIA. BEHIND  
THE OFFSHORE STORM SYSTEM, AND TO THE EAST OF THE MEAN SUBTROPICAL RIDGE AXIS  
OVER NORTHERN MEXICO AND TEXAS, A LARGE AREA OF BELOW NORMAL PRECIPITATION IS  
FAVORED. THIS INCLUDES APPROXIMATELY THE SOUTHEASTERN QUARTER OF THE CONUS,  
NOSING NORTHEASTWARD OVER THE OHIO VALLEY, CENTRAL APPALACHIANS, AND PORTIONS  
OF THE MID-ATLANTIC. AN ACTIVE PATTERN IS LIKELY FOR MOST OF ALASKA DUE TO  
FORECAST ONSHORE FLOW ASSOCIATED WITH THE PREDICTED RIDGE TO THE SOUTH OF THE  
STATE. PROBABILITIES OF ABOVE NORMAL PRECIPITATION EXCEED 60 PERCENT FOR PARTS  
OF WESTERN ALASKA. ABOVE NORMAL PRECIPITATION IS ALSO FAVORED FOR HAWAII,  
CONSISTENT WITH A CONSOLIDATION OF CALIBRATED PRECIPITATION AMOUNTS FROM THE  
GEFS AND ECMWF ENSEMBLES.  
 
THE OFFICIAL 6-10 DAY 500-HPA HEIGHT BLEND CONSISTS OF 30% OF TODAY'S 0Z 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 OUT OF 5, DUE TO  
FAIRLY GOOD AGREEMENT AMONG TODAY'S ENSEMBLE MEANS IN DEPICTING AN AMPLIFIED  
500-HPA PATTERN ACROSS MUCH OF THE FORECAST DOMAIN.  
 
8-14 DAY OUTLOOK FOR OCT 16 - 22 2025  
 
DURING WEEK-2, ANOMALOUS TROUGHING PERSISTS OVER THE VICINITY OF THE BERING SEA  
AND FAR WESTERN ALASKA. DOWNSTREAM RIDGING CONTINUES TO FLATTEN OUT,  
OVERSPREADING WESTERN CANADA WITH PACIFIC AIR. A TROUGH IS FORECAST TO PERSIST  
NEAR THE U.S.WEST COAST (THOUGH WEAKEN RELATIVE TO THE EARLIER 6-10 DAY  
PERIOD), WITH FAST LOW-AMPLITUDE FLOW ACROSS THE REMAINDER OF THE CONUS. THE  
MANUAL HEIGHT BLEND DEPICTS WEAK POSITIVE HEIGHT ANOMALIES AND WEAK RIDGING  
OVER THE SOUTHERN ROCKIES, PLAINS, AND MISSISSIPPI VALLEY. NEAR TO BELOW NORMAL  
500-HPA HEIGHTS ARE PREDICTED FOR THE ATLANTIC COAST STATES, WITH THE GREATER  
NEGATIVE DEPARTURES OVER AND JUST EAST OF NEW ENGLAND. THE CENTER OF THE  
PREDICTED MEAN SUBTROPICAL RIDGE IS FORECAST OVER NORTHERN MEXICO AND SOUTHERN  
TEXAS. TODAY'S ENSEMBLE MEANS CONTINUE TO FORECAST NEAR-NORMAL HEIGHTS OVER THE  
HAWAIIAN ISLANDS.  
 
ABOVE NORMAL TEMPERATURES ARE FAVORED FOR THE CENTRAL CONUS AND MUCH OF THE  
SOUTHEAST, IN ADDITION TO NORTHERN NEW ENGLAND. THIS IS ATTRIBUTED TO ABOVE  
NORMAL MID-LEVEL HEIGHTS AND/OR ANOMALOUS RIDGING OVER MOST OF THIS LARGE AREA.  
FOR NORTHERN NEW ENGLAND, WARMER-THAN-NORMAL MEAN TEMPERATURES ARE FAVORED NEAR  
AND EAST OF A MID-LEVEL TROUGH AXIS. THE MAXIMUM CHANCES FOR ABOVE NORMAL  
TEMPERATURES EXCEED 70 PERCENT OVER PARTS OF TEXAS. FOR MOST OF THE WESTERN AND  
EASTERN THIRDS OF THE CONUS, NEAR TO BELOW NORMAL TEMPERATURE CHANCES ARE  
ELEVATED BASED ON THE PREDICTED PROXIMITY OF MID-LEVEL TROUGHS AND COLD AIR  
ADVECTION. THIS IS WELL SUPPORTED BY RAW AND BIAS-CORRECTED TEMPERATURES FROM  
THE VARIOUS MODELS, AND TO A LESSER EXTENT THE ECENS AND CMCE ENSEMBLE MEANS.  
SOUTHWESTERLY ANOMALOUS FLOW INTO ALASKA TILTS THE ODDS TOWARDS  
WARMER-THAN-NORMAL TEMPERATURES FOR MOST OF THE STATE, WITH THE EXCEPTION OF  
NEAR NORMAL TEMPERATURES FAVORED OVER SOUTHERN PORTIONS OF SOUTHEAST ALASKA.  
ABOVE NORMAL TEMPERATURES ARE LIKELY FOR HAWAII (PARTICULARLY THE WESTERN AND  
CENTRAL ISLANDS), CONSISTENT WITH ABOVE NORMAL SSTS IN THE ADJACENT PACIFIC  
OCEAN.  
 
THE WEEK-2 PRECIPITATION OUTLOOK IS FAIRLY SIMILAR TO THAT OF THE PRECEDING  
6-10 DAY PERIOD. ODDS FOR ABOVE NORMAL PRECIPITATION ARE ELEVATED FOR MUCH OF  
THE WESTERN AND NORTH-CENTRAL CONUS, IN ADDITION TO NORTHERN NEW ENGLAND, BASED  
ON THE SAME REASONING AS FOR THE EARLIER PERIOD, THOUGH NORTHERN NEW ENGLAND IS  
EXPECTED TO BE NEAR AND JUST EAST OF A 500-HPA TROUGH AXIS. A SLIGHT TILT  
FAVORING BELOW NORMAL PRECIPITATION IS INDICATED FROM THE SOUTHERN PLAINS  
EASTWARD ACROSS THE GULF COAST STATES TO THE SOUTHEAST COAST, AND NORTHEASTWARD  
OVER THE TENNESSEE VALLEY, UPPER OHIO VALLEY, MOST OF THE APPALACHIANS, AND  
MID-ATLANTIC REGION. THIS IS BASED ON RAW PRECIPITATION AMOUNTS FROM THE  
VARIOUS MODELS, THE CONSOLIDATION, AND THE AUTOMATED PRECIPITATION TOOLS. THIS  
ANOMALOUSLY DRY AREA (THOUGH PROBABILITIES ARE MODEST) IS BOOKENDED BY THE MEAN  
SUBTROPICAL RIDGE AXIS OVER NORTHERN MEXICO AND TEXAS, AND THE AREA BEHIND THE  
OCEANIC STORM SYSTEM AS IT MOVES FARTHER OUT TO SEA. IN OTHER WORDS, THIS LARGE  
REGION IS FORECAST TO BE IN AN ENVIRONMENT DOMINATED BY SUBSIDENCE. AN ACTIVE  
PATTERN IS FAVORED TO PERSIST ACROSS MOST OF ALASKA AHEAD OF A TROUGH OVER THE  
BERING SEA. ABOVE NORMAL PRECIPITATION IS FAVORED FOR HAWAII, CONSISTENT WITH  
A CONSOLIDATION OF CALIBRATED PRECIPITATION AMOUNTS FROM THE GEFS AND ECMWF  
ENSEMBLES.  
 
THE OFFICIAL 8-14 DAY 500-HPA HEIGHT BLEND CONSISTS OF: 30% OF TODAY'S 0Z 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: NEAR AVERAGE, 3 OUT OF 5, DUE TO  
FAIRLY GOOD MODEL AGREEMENT ON THE 500-HPA CIRCULATION PATTERN, OFFSET BY  
UNCERTAINTIES REGARDING A DEAMPLIFYING FLOW PATTERN AND ASSOCIATED INCREASE IN  
UNCERTAINTY IN THE SURFACE TEMPERATURE AND PRECIPITATION FIELDS.  
 
FORECASTER: ANTHONY A  
 
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 (UNSHADED, "N"). HISTORICAL AVERAGE  
VALUES FOR THE CALENDAR PERIOD OF THE FORECAST (DASHES, "F"). 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 (UNSHADED, "N"). HISTORICAL MEDIAN VALUES  
FOR THE CALENDAR PERIOD OF THE FORECAST (DASHES, "INCHES"). 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  
OCTOBER 16.  
 
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:  
19611019 - 20070918 - 19710922 - 20050923 - 19610924  
 
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:  
19610922 - 19831002 - 20070917 - 19831010 - 19710921  
 
6-10 DAY OUTLOOK TABLE  
OUTLOOK FOR OCT 14 - 18 2025  
 
STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN  
WASHINGTON B N OREGON B A NRN CALIF B A  
SRN CALIF B A IDAHO B A NEVADA B A  
W MONTANA B A E MONTANA N A WYOMING A A  
UTAH A A ARIZONA A A COLORADO A A  
NEW MEXICO A A N DAKOTA A A S DAKOTA A A  
NEBRASKA A A KANSAS A A OKLAHOMA A B  
N TEXAS A B S TEXAS A B W TEXAS A A  
MINNESOTA A A IOWA A A MISSOURI A N  
ARKANSAS A B LOUISIANA A B WISCONSIN A A  
ILLINOIS A N MISSISSIPPI A B MICHIGAN A N  
INDIANA A B OHIO A B KENTUCKY A B  
TENNESSEE A B ALABAMA A B NEW YORK N N  
VERMONT A N NEW HAMP A A MAINE A A  
MASS N A CONN N A RHODE IS N A  
PENN N B NEW JERSEY N N W VIRGINIA A B  
MARYLAND N B DELAWARE N N VIRGINIA N B  
N CAROLINA N B S CAROLINA A B GEORGIA A B  
FL PNHDL A B FL PENIN A B AK N SLOPE A A  
AK ALEUTIAN A A AK WESTERN A A AK INT BSN A A  
AK S INT A A AK SO COAST A A AK PNHDL A N  
 
 
 
8-14 DAY OUTLOOK TABLE  
OUTLOOK FOR OCT 16 - 22 2025  
 
STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN  
WASHINGTON N N OREGON N A NRN CALIF B A  
SRN CALIF B A IDAHO N A NEVADA B A  
W MONTANA N A E MONTANA N A WYOMING A A  
UTAH N A ARIZONA N A COLORADO A A  
NEW MEXICO A A N DAKOTA A A S DAKOTA A A  
NEBRASKA A A KANSAS A A OKLAHOMA A N  
N TEXAS A B S TEXAS A B W TEXAS A N  
MINNESOTA A A IOWA A A MISSOURI A N  
ARKANSAS A N LOUISIANA A B WISCONSIN A A  
ILLINOIS A N MISSISSIPPI A B MICHIGAN A N  
INDIANA A N OHIO N N KENTUCKY N B  
TENNESSEE A B ALABAMA A B NEW YORK B N  
VERMONT N N NEW HAMP N N MAINE A N  
MASS B N CONN B N RHODE IS B N  
PENN B B NEW JERSEY B B W VIRGINIA N B  
MARYLAND B B DELAWARE B B VIRGINIA N B  
N CAROLINA N B S CAROLINA N B GEORGIA A B  
FL PNHDL A B FL PENIN A B AK N SLOPE A N  
AK ALEUTIAN A A AK WESTERN A A AK INT BSN A A  
AK S INT A A AK SO COAST A A 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.  
 

 
 
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