PROGNOSTIC DISCUSSIONS FOR 6 TO 10 AND 8 TO 14 DAY OUTLOOKS NWS CLIMATE PREDICTION CENTER CAMP SPRINGS MD 300 PM EST TUE NOV 4 2003 6 TO 10 DAY OUTLOOK FOR NOV 10 - NOV 14 2003 . . . . . . . TODAYS MODELS AT DAY 5 ARE IN FAIRLY GOOD AGREEMENT ON THE LARGE-SCALE PATTERN OVER NORTH AMERICA AND IN BETTER AGREEMENT ON THE DETAILS THAN YESTERDAYS RUNS. BY DAY 5 THE HIGHLY AMPLIFIED 500-HPA PATTERN THAT INITIALLY COVERS THE CONTINENT IS FORECAST TO DEAMPLIFY SIGNIFICANTLY LEAVING FAIRLY ZONAL FLOW OVER THE LOWER 48 STATES. WITHIN THIS FLOW IT IS EXPECTED THAT THERE WILL BE ONE OR TWO WEAK TO MODERATE STRENGTH SHORTWAVE TROUGHS OVER THE UPPER MIDWEST AND GREAT LAKES...ALTHOUGH THE ECMWF AND GFS RUNS DISAGREE ON THE RELATIVE STRENGTH OF THESE TWO FEATURES. THE ECMWF HAS A STRONGER WAVE OVER THE GREAT LAKES AND LEAVES THE SECOND WAVE MOSTLY NORTH OF THE U.S./CANADA BORDER WHILE THE 0Z AND 6Z GFS RUNS WEAKEN THE LEAD WAVE AS IT GOES INTO A SHORT WAVE RIDGE OVER NEW ENGLAND AND PLACE MOST OF THEIR EMPHASIS ON THE FOLLOWING TROUGH. FARTHER WEST THE MODELS HAVE ANOTHER TROUGH NEAR NORTHERN CALIFORNIA BY DAY 5...EXCEPT THE CANADIAN WHICH LEAVES THIS SYSTEM ABOUT 15 DEGREES FARTHER WEST. IN GENERAL DURING THE FIRST FIVE DAYS THE PATTERN IS EXPECTED TO BE PROGRESSIVE...WITH DISTINCT NORTHERN AND SOUTHERN STREAMS OVER THE EASTERN PACIFIC AND WESTERN NORTH AMERICA MERGING DOWNSTREAM IN THE CONFLUENCE ZONE OVER EASTERN NORTH AMERICA. IN THE MEAN FOR THE 6 TO 10 DAY PERIOD THE MODELS HAVE DIVERGED IN THEIR SOLUTIONS COMPARED TO YESTERDAY. THE ECMWF IS MORE AMPLIFIED THAN YESTERDAY AND HAS ALSO MOVED ITS MAIN TROUGH AND RIDGE AXES EASTWARD. THE NEWLY AVAILABLE ECMWF ENSEMBLE MEAN IS MORE CONSISTENT BETWEEN RUNS...BUT KEEPS THE MAIN TROUGH AXIS OFF THE WEST COAST. THE GFS RUNS ARE ALSO MORE PROGRESSIVE THAN THOSE FROM YESTERDAY... LIKE THE ECMWF...BUT UNLIKE THE ECMWF THEY ARE LESS AMPLIFIED THAN THEIR CORRESPONDING PREVIOUS RUNS. THE MRF ENSEMBLE MEAN IS FAIRLY CONSISTENT WITH YESTERDAYS...ALTHOUGH ALSO A BIT DEAMPLIFIED AND FARTHER EAST WITH ITS MAIN FEATURES. DOWNSTREAM ALL THE MODELS CONTINUE TO FORECAST A STRONG BLOCKING RIDGE IN THE VICINITY OF SCANDANAVIA. THE ECMWF TELECONNECTS SLIGHTLY BETTER THAN THE GFS SOLUTIONS. THE GFS AND ECMWF ENSEMBLE SPAGHETTI DIAGRAMS HAVE MORE SPREAD THAN YESTERDAY...ALTHOUGH THE ENSEMBLE MEANS ARE FAIRLY WELL IN PHASE THROUGH THE PERIOD WITH THE MRF ENSEMBLE MEAN BEING MORE AMPLIFIED THAN THE ECMWF ENSEMBLE MEAN. MODEL OF THE DAY: NO PREFERENCE FORECAST CONFIDENCE FOR THE 6 TO 10 DAY PERIOD IS BELOW AVERAGE TODAY...2 ON A SCALE FROM 1 TO 5...DUE TO BELOW AVERAGE MODEL AGREEMENT AND CONTINUITY. THE OFFICIAL HEIGHT PROG FOR TODAY CONSISTS OF 30 PERCENT OF TODAYS 0Z GFS OPERATIONAL RUN CENTERED ON DAY 8...30 PERCENT OF TODAYS ECMWF SOLUTION CENTERED ON DAY 7...30 PERCENT OF TODAYS GFS ENSEMBLE MEAN CENTERED ON DAY 8...AND 10 PERCENT OF THE DAVA CENTERED ON DAY 8. THE TEMPERATURE PROG IS BASED ON THE KLEIN AND NEURAL NET SPECIFICATIONS FROM THE OFFICIAL HEIGHT FIELD AND MOS TEMPERATURES FROM THE GFS ENSEMBLE. THE PRECIPITATION PROG IS BASED ON CALIBRATED PRECIPITATION FROM THE GFS ENSEMBLE MEMBERS...THE NEURAL NET SPECIFICATIONS FROM THE OFFICIAL HEIGHT FIELD...AND THE BIAS CORRECTED AND THE CALIBRATED PRECIPITATION FROM THE 0Z OPERATIONAL GFS. . . . . . . . 8 TO 14 DAY OUTLOOK FOR NOV 12 - NOV 18 2003 FOR THE WEEK 2 PERIOD THE MODELS CONTINUE TO DIVERGE IN THEIR FORECASTS...AND MOST DIVERGE FROM WHAT THEY FORECAST FOR THE 6 TO 10 DAY PERIOD. MOST SOLUTIONS HAVE SPLIT FLOW SOMEWHERE OVER NORTH AMERICA...BUT THE DETAILS DIFFER. THERE IS AGREEMENT ON A MEAN TROUGH OVER ALASKA...WITH WELL BELOW NORMAL 500-HPA HEIGHTS. THE RESULTING SOUTHERLY ANOMALOUS FLOW OVER NORTHEASTERN CANADA WOULD SHUT DOWN THE MAIN SOURCE REGION FOR SIGNIFICANTLY COLDER THAN NORMAL AIR FOR THE LOWER 48 STATES. AT LEAST THIS IS CONSISTENT WITH THE TEMPERATURE SPECIFICATIONS FROM THE OFFICIAL HEIGHT PROG...WHICH SHOW NEAR OR ABOVE NORMAL TEMPERATURES FOR ALMOST THE ENTIRE LOWER 48 STATES. CONFIDENCE IN THE WEEK 2 FORECAST IS WELL BELOW AVERAGE TODAY...1 ON A SCALE OF 1 TO 5...DUE TO POOR MODEL AGREEMENT AND POOR CONTINUITY FROM DAYS 6-10. THE OFFICIAL 500-HPA HEIGHT PROG FOR TODAY CONSISTS OF 25 PERCENT OF TODAYS ENSEMBLE MEAN CENTERED ON DAY 11...25 PERCENT OF TODAYS DAVA CENTERED ON DAY 11...25 PERCENT OF TODAYS 0Z GFS OPERATIONAL RUN CENTERED ON DAY 11..AND 25 PERCENT OF TODAYS 5-DAY AVERAGE ECMWF CENTERED ON DAY 7. THE TEMPERATURE PROG IS BASED ON THE KLEIN AND NEURAL NET SPECIFICATIONS FROM THE OFFICIAL 500-HPA HEIGHT PROG...WHICH WERE IN UNUSUALLY GOOD AGREEMENT. THE PRECIPITATION PROG IS BASED ON BIAS CORRECTED AND CALIBRATED PRECIPITATION FROM THE 0Z GFS...NEURAL NET SPECIFICATIONS FROM THE OFFICIAL 500-HPA HEIGHT PROG...AND CALIBRATED PRECIPITATION FROM THE GFS ENSEMBLE MEMBERS. FORECASTER: R. MARTIN . . . . . . . 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 NOV 20 2003. 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: 19781118 - 19791105 - 19911024 - 19851110 - 19861108 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: 19861108 - 19851109 - 19911023 - 19791105 - 19781117 6 to 10 day Outlook Table STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN WASHINGTON N B OREGON B B NRN CALIF B N SRN CALIF B N IDAHO B B NEVADA B N W MONTANA B N E MONTANA B N WYOMING B N UTAH B N ARIZONA B N COLORADO B N NEW MEXICO N N N DAKOTA N N S DAKOTA N B NEBRASKA N N KANSAS N A OKLAHOMA N A N TEXAS A A S TEXAS A N W TEXAS A A MINNESOTA N N IOWA N N MISSOURI N A ARKANSAS A A LOUISIANA A A WISCONSIN N N ILLINOIS N N MISSISSIPPI A A MICHIGAN N N INDIANA A N OHIO A N KENTUCKY A A TENNESSEE A A ALABAMA A A NEW YORK N N VERMONT N N NEW HAMP N N MAINE B N MASS N N CONN N N RHODE ISL N N PENN N N NEW JERSEY A N W VIRGINIA A A MARYLAND A A DELAWARE A A VIRGINIA A A N CAROLINA A A S CAROLINA A A GEORGIA A A FL PNHDL A A FL PENIN A N AK N SLOPE B A AK ALEUTIAN N B AK WESTERN B N AK INT BSN B A AK S INT N N AK S COAST N B AK PNHDL A B 8 to 14 day Outlook Table STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN WASHINGTON N B OREGON N B NRN CALIF N B SRN CALIF N N IDAHO N B NEVADA N N W MONTANA N B E MONTANA A B WYOMING N B UTAH N B ARIZONA N N COLORADO N N NEW MEXICO A N N DAKOTA A B S DAKOTA A B NEBRASKA A N KANSAS A A OKLAHOMA A A N TEXAS A A S TEXAS A N W TEXAS A A MINNESOTA A N IOWA A N MISSOURI A A ARKANSAS A A LOUISIANA A N WISCONSIN A N ILLINOIS A A MISSISSIPPI A N MICHIGAN A N INDIANA A A OHIO A A KENTUCKY A A TENNESSEE A A ALABAMA A N NEW YORK A N VERMONT A N NEW HAMP A N MAINE B N MASS A N CONN A N RHODE ISL A N PENN A N NEW JERSEY A N W VIRGINIA A N MARYLAND A N DELAWARE A N VIRGINIA A N N CAROLINA A N S CAROLINA A N GEORGIA A N FL PNHDL A N FL PENIN A B AK N SLOPE B B AK ALEUTIAN N N AK WESTERN B B AK INT BSN B B AK S INT B N AK S COAST B A AK PNHDL N A 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. $$