PROGNOSTIC DISCUSSIONS FOR 6 TO 10 AND 8 TO 14 DAY OUTLOOKS NWS CLIMATE PREDICTION CENTER CAMP SPRINGS MD 300 PM EST THU DEC 25 2003 6 TO 10 DAY OUTLOOK FOR DEC 31 2003 - JAN 4 2004 . . . . . . . . THE MODELS ARE IN GOOD AGREEMENT ON DAILY 500-HPA HEIGHT FORECASTS OUT THROUGH DAY 5... WITH THE EXPECTED INCREASE IN UNCERTAINTY IN DETAILS OF THE SHORT WAVES WHICH BECOME NOTICEABLE BY DAYS 4 AND 5 BUT DO NOT SERIOUSLY IMPACT THE LONG WAVE PATTERN. THE RIDGE INITIALLY OVER THE PLAINS PROGRESSES TO THE EAST COAST BY DAYS 4 AND 5 AND A STRONG MEAN TROUGH MOVES INTO THE WESTERN U.S. FROM THE PACIFIC... WITH MULTIPLE SHORT WAVES ROTATING THROUGH IT. THE MOST NOTICEABLE DIFFERENCES WERE THAT THE ECMWF WAS SIGNIFICANTLY SLOWER WITH THE TROUGH MOVING THROUGH THE MISSISSIPPI VALLEY ON DAY 4 AND THE 00Z GFS HAD A DEEPER TROUGH OVER THE SOUTHERN ROCKIES ON DAY 5 THAN DID THE OTHER MODELS. DURING THE 6-10 DAY PERIOD THE MODELS CONTINUE TO HAVE GENERALLY GOOD AGREEMENT ON THE FORECAST LARGE-SCALE FEATURES OF THE LONG-WAVE PATTERN. THE STRONG POSITIVE ANOMALY OVER NORTHEAST CANADA IS NOW PREDICTED A BIT FARTHER SOUTH JUST OFF THE NEWFOUNDLAND COAST... WITH SPLIT FLOW AND A TROUGH AND NEGATIVE ANOMALY CENTER SOUTH OF NOVA SCOTIA OVER THE WESTERN ATLANTIC. THE GFS RUNS... 00Z... 06Z AND ENSEMBLE MEAN ALL HAVE A TENDENCY FOR A WEAK BREAKTHROUGH OF NEGATIVE HEIGHT ANOMALIES ACROSS THE NORTHEASTERN STATES... WHILE THE CANADIAN ENSEMBLE MEAN... THE ECMWF... THE ECMWF ENSEMBLE MEAN AND THE DAVA ALL BUILD A SUBSTANTIAL RIDGE OVER THE EASTERN U.S. TELECONNECTIONS FROM EITHER THE GULF OF ALAKSA/ALEUTIANS/BERING SEA POSITIVE HEIGHT ANOMALY CENTER OR THE NEGATIVE ANOMALY CENTER NEAR THE PACIFIC NORTHWEST COAST FAVOR A STRONG RIDGE OVER THE SOUTHEASTERN U.S. THE BLOCK OVER EASTERN CANADA AND THE NORTHWESTERN ATLANTIC TELECONNECTS WELL WITH ONLY THE NEGATIVE ANOMALY TO ITS SOUTH OVER THE WESTERN ATLANTIC... BUT ALSO POINTS MORE TOWARDS THE GFS PREFERENCE FOR BELOW NORMAL HEIGHTS ACROSS THE EASTERN U.S. FOR THESE REASONS THE ECMWF AND THE CANADIAN ENSEMBLE MEAN WERE GIVEN HIGHER WEIGHTS THAN USUAL IN THE BLEND. MODEL OF THE DAY: NO PREFERENCE THE OFFICIAL HEIGHT PROG FOR TODAY CONSISTS OF 10 PERCENT OF TODAYS GFS ENSEMBLE MEAN CENTERED ON DAY 8... 20 PERCENT OF THE HIGH RESOLUTION ECMWF CENTERED ON DAY 7... 20 PERCENT EACH OF THE LATEST 00Z AND 06Z OPERATIONAL GFS RUNS CENTERED ON DAY 8... 10 PERCENT OF THE DAVA CENTERED ON DAY 8.... AND 20 PERCENT OF THE CANADIAN ENSEMBLE MEAN CENTERED ON DAY 8. FORECAST CONFIDENCE FOR THE 6 TO 10 DAY PERIOD IMPROVED TO ABOVE AVERAGE AGAIN TODAY... 4 ON A SCALE FROM 1 TO 5 FOR THE REASONS DISCUSSED ABOVE. THE ANALOG TEMPERATURE AND PRECIPITATION SPECIFICATIONS BASED ON THE VARIOUS MODELS WERE IN CORRESPONDINGLY REASONABLY GOOD AGREEMENT. THE D+8 TEMPERATURE PROG IS BASED ON KLEIN AND NEURAL NET SPECIFICATIONS FROM THE OFFICIAL HEIGHT BLEND CHART... ANALOGS TO THE BLENDED HEIGHT FIELD AND THE INDIVIDUAL MODELS... AND THE BIAS CORRECTED 850-HPA TEMPERATURES FROM THE 00Z OPERATIONAL GFS. THE MOS TEMPERATURE FORECAST FROM THE GFS ENSEMBLE WAS AVAILABLE... BUT WAS NOT WEIGHTED MUCH INTO THE TEMPERATURE FORECAST BECAUSE IT APPEARED TO BE TOO WARM IN MANY PLACES... ESPECIALLY THE FAR WEST. THE KLEIN TEMPEERATURE SPECIFICATION WAS MUCH COOLER OVER THE EAST THAN THE NEURAL NET AND THE ANALOGS AND WAS SOMEWHAT DISCOUNTED. THE D+8 PRECIPITATION PROG IS BASED ON GFS ENSEMBLE CALIBRATED PRECIPITATION PERCENTAGES... ANALOGS TO THE BLENDED HEIGHT FIELD... THE NEURAL NET SPECIFI- CATIONS FROM THE OFFICIAL HEIGHT BLEND... THE CALIBRATED PRECIPITATION FROM THE 0Z OPERATIONAL GFS AND THE BIAS CORRECTED PRECIPITATION FROM THE 0Z OPERA- TIONAL GFS. . . . . . . . . 8 TO 14 DAY OUTLOOK FOR JAN 2 - JAN 8 2004 THE CIRCULATION PATTERNS PREDICTED BY THE VARIOUS GFS MODELS WERE IN QUITE FOOD AGREMENT AND ALL ARE FORECASTING A BROAD INTENSE TROUGH COVERING MOST OF THE CONUS WHICH WOULD IMPLY GENERALLY COLD WEATHER FOR MOST OF THE CONUS WITH WELL BELOW NORMAL TEMPERATURES OVER THE NORTH-CENTRAL STATES WHERE ARCTIC AIR IS LIKLEY TO BE IN PLACE DURING MUCH OF THE PERIOD... ESPECIALLY OVER THE GREAT PLAINS REGION. AT THE SAME TIME THE BLOCK OVER EASTERN CANADA IS PREDICTED TO WEAKEN ALTHOUGH THERE IS SOME DISAGREEMENT AMONG THE MODELS AS TO HOW FAST THIS WILL HAPPEN. IN ANY CASE A MAJOR ARCTIC AIRMASS WILL BE BUILDING OVER NORTHWESTERN CANADA AND WILL LIKELY BEGIN TO AFFECT THE CONUS SOMETIME DURING THE WEEK TWO PERIOD. THE TREND FOR THE RIDGE OVER THE GULF OF ALASKA TO STRENGTHEN FURTHER AND BEGIN TO RETROGRADE TOWARDS THE BERING STRAITS IS WELL EXTABLISHED AS SEEN MOST STRONGLY IN SOME THE THE INDIVIDUAL GFS OPAERATIONAL RUNS BUT IT IS NOW OBVIOUS IN THE OFFICAL BLENDED CIRCULATION MAP TOO. THE BLOCK OVER THE ARCTIC IS INDICATED BY MOST OF THE MODELS... BUT THERE IS ALSO A LOT OF UNCERTAINTY AS TO HOW STRONG IT WILL BE OR WHETHER MOST OF THE POSITIVE ANOMALY WILL BE BE ASSOCIATED WITH THE BERING SEA RIDGE. THE OFFICIAL 500-HPA HEIGHT PROG FOR TODAY CONSISTS OF 40 PERCENT OF TODAYS GFS ENSEMBLE MEAN CENTERED ON DAY 11... 10 PERCENT OF EACH OF THE 00Z AND 06Z GFS OPERATIONAL RUNS CENTERED ON DAY 11... 10 PERCENT OF TODAYS 5-DAY MEAN ECMWF CENTERED ON DAY 7... 10 PERCENT OF THE 06Z OPERATIONAL GFS CENTERED ON DAY 7... 10 PERCENT OF THE CANADIAN ENSEMBLE 5-DAY MEAN CENTERED ON DAY 8... AND 10 PERCENT OF YESTEERDAYS GFS ENSEMBLE MEAN CENTERED ON TODAYS DAY 10. THE HEIGHT FIELDS CENTERED ON DAY 7 AND DAY 8 WERE INCLUDED IN ORDER TO RAISE HEIGHTS SOMEWHAT OVER THE EASTERN U.S. MORE IN ACCORD WITH THE MODAL TELECONNECTIONS FROM THE BERING STRAIT POSITIVE AND PACIFIC NORTHWEST NEGATIVE ANOMALY CENTERS. FORECAST CONFIDENCE FOR THE 8 TO 14 DAY PERIOD IS ABOUT AVERAGE TODAY... RATED A 3 ON A SCALE FROM 1 TO 5... DUE TO THE FAIRLY GOOD AGREEMENT AMONG THE MODELS OFFSET SOMEWHAT BY RATHER LARGE SPREAD IN THE GFS ENSEMBLE MEMBERS... AND UNCERTAINTIES ABOUT THE RELATIVE STRENGTHS OF THE RIDGES OVER EASTERN NORTH AMERICA... THE ARCTIC... AND THE BERING STRAIT. THE D+11 TEMPERATURE PROG IS BASED ON THE KLEIN AND NEURAL NET SPECIFICATIONS TO THE BLEND... ANALOGS TO THE BLEND AND THE VARIOUS MODELS USED IN IT... AND THE 850-HPA BIAS CORRECTED TEMPERATURES FROM THE 00Z OPERATIONAL GFS. THE KLEIN SPECIFICATION ALSO APPEARED TOO COLD OVER THE EAST FOR THE WEEK TWO PERIOD COMPARED TO THE OTHER TEMPERATURE TOOLS AND WAS SOMEWHAT DISCOUNTED. THE D+11 PRECIPITATION PROG IS BASED ON THE GFS ENSEMBLE CALIBRATED PRECIPITATION PERCENTAGES... NEURAL NET SPECIFICATIONS TO THE BLEND... ANALOGSTO THE OFFICIAL FORECAST AND THE VARIOUS MODELS FOR THE WEEK TWO PERIOD... AND THE BIAS CORRECTED PRECIPITATION FROM THE 00Z OPERATIONAL GFS. FORECASTER: A. J. WAGNER . . . . . . . NOTES: AUTOMATED FORECASTS ARE ISSUED ON SATURDAY AND SUNDAY. OTHERWISE - FORECASTS INCORPORATE FORECASTER INPUT. 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 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 NARRATIVE DESCRIPTION OF THE FORECAST PATTERNS FOR TEMPERATURE AND PRECIPITATION FOR BOTH THE 6-10 OR 8-14 DAY PERIODS HAS BEEN DISCONTINUED. THE STATE TABLES FOR BOTH THE 6-10 AND 8-14 DAY PERIODS ARE NOW CONTAINED IN THIS MESSAGE...AVAILABLE AS PMDMRD ON AWIPS. . . . . . . . GLOSSARY AND DEFINITIONS:--------------------------------------------- AC - ANOMALY CORRELATION - A MEASURE OF HOW WELL A MODEL FORECASTS THE HEIGHT OR HEIGHT ANOMALY FIELD OBTAINED BY CORRELATING THE IMPLIED GRADIENTS OF THE TWO ANOMALY PATTERNS BEING COMPARED. ANALOG (NATURAL ANALOG) - A WEATHER MAP THAT RESEMBLES ANOTHER WEATHER MAP - USUALLY FROM DIFFERENT YEARS BUT THE SAME SEASON IN THE HISTORICAL RECORD. THE CRITERION FOR SELECTING AN ANALOG IS OFTEN THE PATTERN CORRELATION BETWEEN THE MAPS. TWO MAPS WILL JUST BEGIN TO RESEMBLE EACH OTHER TO THE HUMAN EYE AT A PATTERN CORRELATION OF ABOUT 40%. TO BE USEFUL - ANALOGS NEED TO HAVE MUCH HIGHER CORRELATIONS TO THE ORIGINAL MAP THAN THAT - 80% OR MORE. ANALOGS ARE INCREASINGLY DIFFICULT TO FIND AS THE GEOGRAPHIC REGION BEING STUDIED INCREASES IN SIZE. PERFECT ANALOGS TO THE ENTIRE NORTHERN HEMISPHERE SIMPLY DO NO EXIST - FOR PRACTICAL PURPOSES. THIS IS WHY SIMPLE NATURAL ANALOG FORECAST METHODS DO NOT WORK VERY WELL. ANOMALY - THE ARITHMETIC DIFFERENCE BETWEEN THE VALUE OF A VARIABLE AT A GIVEN PLACE AND TIME AND THE LONG-TERM AVERAGE OF THAT VARIABLE AT THAT PLACE AND TIME OF YEAR. AO - ARCTIC OSCILLATION - A MEASURE OF THE DIFFERENCE BETWEEN THE MEAN MID-TROPOSPHERIC HEIGHT OR SEA LEVEL PRESSURE ANOMALY OVER THE POLAR BASIN AND THE CORRESPONDING AVERAGE ANOMALY IN A RING SURROUNDING THE POLAR BASIN AT MIDDLE LATITUDES. THE AO IS CONSIDERED TO BE THE LEADING MODE OF CLIMATE VARIABILITY OF THE EXTRATROPICAL NORTHERN HEMISPHERE. THE AO CAN ALSO BE CONSIDERED TO INCLUDE THE NAO (NORTH ATLANTIC OSCILLATION) WITH WHICH IT IS POSITIVELY CORRELATED - BUT NOT IDENTICAL. THE PHASE OF THE AO IS CONSIDERED TO BE POSITIVE WHEN HEIGHTS OR PRESSURES ARE BELOW NORMAL OVER THE ARCTIC BASIN AND ABOVE NORMAL OVER SURROUNDING MID- LATITUDES - AND IS NEGATIVE FOR THE REVERSE ANOMALY PATTERN. BLEND - A WEIGHTED AVERAGE OF 500-HPA HEIGHT FORECAST MAPS FROM SEVERAL MODELS. WEIGHTS ARE CURRENTLY ASSIGNED SUBJECTIVELY BY THE FORECASTER. THE SUM OF THE WEIGHTS MUST BE 1. WEIGHTS ARE APPLIED BY MULTIPLYING EACH 500-HPA MAP BY ITS WEIGHT AND ADDING ALL OF THE WEIGHTED MAPS TOGETHER TO MAKE THE OFFICIAL 500-HPA FORECAST. CONUS - CONTERMINOUS UNITED STATES. DAVA - DIVERGENT ANOMALY VORTICITY ADVECTION MODEL. THIS IS A BAROTROPIC MODEL WITH DIVERGENCE IN IT TO ALLOW MORE ACCURATE PREDICTION OF LONG WAVES THAN A STANDARD BAROTROPIC MODEL. REFERENCE: QIN J. AND H.M. VAN DEN DOOL - 1996: SIMPLE EXTENSIONS OF AN NWP MODEL. MON. WEA. REV. - VOL 124 - PP 277-287. EL NINO - THE WARM PHASE OF ENSO. ENSO - EL NINO/SOUTHERN OSCILLATION. FLOW PATTERN - THE PATTERN OF WIND INFERRED BY THE 500-HPA CONTOURS - THE WIND TENDS TO BLOW PARALLEL TO THE CONTOURS WITH LOW HEIGHT ON THE LEFT - IN THE NORTHERN HEMISPHERE - THE OPPOSITE IS TRUE IN THE SOUTHERN HEMISPHERE. WIND SPEED IS INVERSELY PROPORTIONAL TO THE SPACING BETWEEN THE CONTOURS. GFS - GLOBAL FORECAST SYSTEM. THIS REFERS TO ANY OF THE GLOBAL MODELS RUN AT NCEP FOUR TIMES A DAY THAT USED TO BE REFERRED TO AS THE MRF AND AVN MODELS. THE MODEL RUN INITIATED AT 00Z (00 GMT) IS CURRENTLY THE ONLY ONE USED BY CPC IN ITS OFFICIAL BLEND FORECAST - ALTHOUGH THE OTHERS CAN BE CONSIDERED BY THE FORECASTER IN FORMULATING THE TEMPERATURE AND PRECIPITATION FORECASTS. GFS ENSEMBLE - A SET OF GFS FORECASTS WHICH ARE ALL VALID AT THE SAME TIME BUT WHOSE STARTING CONDITIONS DIFFER BY SMALL AMOUNTS. THERE ARE CURRENTLY 25 MEMBERS IN THE GFS ENSEMBLE. THE AVERAGE OF THESE IS THE GFS ENSEMBLE MEAN. 500-HPA HEIGHT IS THE HEIGHT - IN METERS - ABOVE MEAN SEA LEVEL - WHICH ABOUT HALF OF THE MASS OF THE ATMOSPHERE LIES ABOVE AND BELOW - AS MEASURED BY THE PRESSURE. UPPER AIR STORM SYSTEMS TEND TO BE STEERED IN THE DIRECTION OF THE WINDS AT 500-HPA. 500-HPA SYSTEMS CORRELATE STRONGLY WITH SURFACE WEATHER. HPA - HECTO-PASCALS. 1 HPA = 1 MILLIBAR. LA NINA - THE COLD PHASE OF ENSO. MERIDIONAL FLOW PATTERN - OCCURS WHEN 500-HPA CONTOURS EXHIBIT LARGE NORTHWARD AND SOUTHWARD EXCURSIONS WITH EXTENSIVE AREAS OF SOUTHERLY AND NORTHERLY FLOW. MODEL BIAS - THE DIFFERENCE BETWEEN THE MODEL CLIMATOLOGY AND THE OBSERVED CLIMATOLOGY - EXPRESSED AS BIAS = MODEL CLIMO - OBSERVED CLIMO. MODEL OF THE DAY - FOR 6-10 DAYS - IS THE MODEL WHOSE SOLUTION IS CONSIDERED TO BE MORE RELIABLE THAN USUAL - AND MAY BE GIVEN HIGHER THAN TYPICAL WEIGHT IN THE BLEND. NO MODEL OF THE DAY IS CHOSEN FOR 8-14 DAYS. MOS - MODEL OUTPUT STATISTICS - A STATISITCAL TOOL FOR SPECIFYING THE SURFACE TEMPERATURE (AND ITS ANOMALY) FROM MODEL FIELDS - CORRECTING AUTOMATICALLY FOR BOTH BIASES IN THE MODEL FIELDS AND THE SPECIFICATION METHOD. IT IS VALID AS LONG AS A GIVEN CONFIGURATION OF A MODEL IS NOT CHANGED OR MODIFIED. MJO - MADDEN-JULIAN OSCILLATION - ALSO CALLED TROPICAL INTRA-SEASONAL OSCILLATION - A SERIES OF WAVES WITH A PERIOD AVERAGING 50 DAYS THAT MOVES SLOWLY EASTWARD NEAR THE EQUATOR ALTERNATELY ENHANCING AND SUPRESSING PRECIPITATION. NAO - NORTH ATLANTIC OSCILLATION TELECONNECTION PATTERN. IT CAN ALSO BE VIEWED AS THE ATLANTIC HALF OF THE AO (ARCTIC OSCILLATION) TELECONNECTION PATTERN - STRONGLY INFLUENCES TEMPERATURES OVER EUROPE AND MUCH OF NORTH AMERICA - ESPECIALLY DURING THE COLD SEASONS - AND DETERMINES THE MEAN LATITUDE OF THE PREVAILING STORM TRACKS ACROSS THE NORTH ATLANTIC. THE PHASE OF THE NAO IS CONSIDERED POSITIVE WHEN PRESSURES AND HEIGHTS ARE BELOW NORMAL OVER GREENLAND AND ICELAND (STRONG ICELANDIC LOW) AND ABOVE NORMAL AT MIDDLE AND SUBTROPICAL LATITUDES (STRONG BERMUDA-AZORES HIGH) - AND NEGATIVE FOR THE REVERSE ANOMALIES. PNA - PACIFIC NORTH AMERICAN TELECONNECTION PATTERN. PROG - PROGNOSIS - OR FORECAST. PROGRESSION OR PROGRESSIVE MOTION - THE NORMAL MOVEMENT OF ATMOSPHERIC WEATHER SYSTEMS (HIGHS... LOWS... RIDGES... OR TROUGHS) FROM WEST TO EAST IN THE MIDDLE LATITUDES. RETROGRESSION OR RETROGRADE MOTION - A TYPE OF MOTION SOMETIMES OBSERVED IN WEATHER SYSTEMS WHEN THEY END UP IN POSITIONS FURTHER TO THE WEST THAN THEIR ORIGINAL LOCATIONS - CONTRARY TO THEIR USUAL WEST TO EAST MOTION. RIDGE - A REGION OF UNUSUALLY HIGH 500-HPA HEIGHT. SHORT WAVES - RELATIVELY LOW-AMPLITUDE - FAST-MOVING DISTURBANCES OF THE 500-HPA FIELD. SOUTHERN STREAM - A FLOW PATTERN WITH UNUSUALLY STRONG FLOW ACROSS THE SOUTHERN U.S. - ACCOMPANIED BY UNUSUAL STORMINESS IN THE SOUTH AND SOUTHEAST. SPECIFICATIONS - KLEIN AND NEURAL NETWORK SPECIFICATIONS GIVE THE HISTORICAL RELATIONSHIP BETWEEN 500-HPA HEIGHT ANOMALIES AND SURFACE TEMPERATURE AND PRECIPITATION. KLEIN SPECIFICATIONS TEND TO EMPHASIZE REGIONAL TELECONNECTIONS WHILE THOSE FROM THE NEURAL NETWORK WORK FROM GLOBAL TELECONNECTIONS. . . . . . . . TELECONNECTIONS GIVE THE HISTORICAL RELATIONSHIP BETWEEN THE 500-HPA HEIGHT AT A GIVEN POINT AND ALL OTHER POINTS ON A MAP FOR A GIVEN TIME OF YEAR. WE AVERAGE THE TOP/BOTTOM 10% OF DAILY MAPS FROM 1950-1999 FOR THE SAME TIME OF YEAR HAVING THE HIGHEST/LOWEST 500-HPA HEIGHT AT THE SPECIFIED POINT. TROUGH - A REGION OF UNUSUALLY LOW 500-HPA HEIGHT. UTC - UNIVERSAL TIME COORDINATED - SAME AS GREENWICH MEAN TIME (GMT). WESTERLY WIND - WIND BLOWING FROM WEST TO EAST. EASTERLY WIND - WIND BLOWING FROM EAST TO WEST. NORTHERLY WIND - WIND BLOWING FROM NORTH TO SOUTH SOUTHERLY WIND - WIND BLOWING FROM SOUTH TO NORTH. ZONAL FLOW PATTERN - OCCURS WHEN 500-HPA CONTOURS LIE IN AN EAST-WEST DIRECTION PARALLEL TO LATITUDE CIRCLES WITH NEARLY PURE WEST-TO-EAST FLOW. ---------------------------------------------------------------------- THE NEXT MONTHLY AND SEASONAL OUTLOOKS WILL BE RELEASED ... THURSDAY JAN 15 2004. 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: 19911226 - 19941221 - 19791227 - 19871206 - 19580102 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: 19580102 - 19791227 - 19610106 - 19941221 - 19911226 6 to 10 day Outlook Table STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN WASHINGTON B N OREGON B N NRN CALIF B A SRN CALIF B A IDAHO B A NEVADA B A W MONTANA B N E MONTANA B N WYOMING B A UTAH N A ARIZONA B N COLORADO N A NEW MEXICO N N N DAKOTA N B S DAKOTA N B NEBRASKA N N KANSAS N B OKLAHOMA N N N TEXAS A N S TEXAS A B W TEXAS N B MINNESOTA N N IOWA N A MISSOURI N A ARKANSAS A A LOUISIANA A N WISCONSIN N A ILLINOIS A A MISSISSIPPI A N MICHIGAN A A INDIANA A A OHIO A A KENTUCKY A N TENNESSEE A N ALABAMA A N NEW YORK A A VERMONT A A NEW HAMP A A MAINE A N MASS A N CONN A N RHODE IS A N PENN A A NEW JERSEY A N W VIRGINIA A N MARYLAND A N DELAWARE A N VIRGINIA A N N CAROLINA A N S CAROLINA A B GEORGIA A B FL PNHDL A B FL PENIN A B AK N SLOPE A N AK ALEUTIAN A N AK WESTERN A A AK INT BSN N N AK S INT B B AK SO COAST B B AK PNHDL B B 8 to 14 day Outlook Table STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN WASHINGTON B N OREGON B A NRN CALIF B A SRN CALIF B N IDAHO N A NEVADA N A W MONTANA B A E MONTANA B A WYOMING B A UTAH N A ARIZONA N N COLORADO B A NEW MEXICO N N N DAKOTA B N S DAKOTA B A NEBRASKA B A KANSAS B N OKLAHOMA B B N TEXAS B B S TEXAS N B W TEXAS N B MINNESOTA B N IOWA B N MISSOURI B N ARKANSAS B N LOUISIANA N N WISCONSIN B N ILLINOIS B N MISSISSIPPI N N MICHIGAN B A INDIANA B N OHIO N A KENTUCKY N A TENNESSEE N A ALABAMA N N NEW YORK N A VERMONT N N NEW HAMP N N MAINE A N MASS N N CONN N A RHODE IS N N PENN N A NEW JERSEY N A W VIRGINIA N A MARYLAND N A DELAWARE N A VIRGINIA N A N CAROLINA N A S CAROLINA N A GEORGIA N A FL PNHDL N N FL PENIN A B AK N SLOPE A N AK ALEUTIAN N N AK WESTERN N N AK INT BSN N N AK S INT B B AK SO COAST B B AK PNHDL B B 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. $$