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FXUS06 KWBC 201901
PMDMRD
PROGNOSTIC DISCUSSION FOR 6 TO 10 AND 8 TO 14 DAY OUTLOOKS
NWS CLIMATE PREDICTION CENTER COLLEGE PARK, MD
300 PM EDT TUE MAY 20 2025
6-10 DAY OUTLOOK FOR MAY 26 - 30 2025
TODAY'S MODEL SOLUTIONS START OFF IN GOOD AGREEMENT BUT BEGIN TO DIVERGE LATE
IN THE PERIOD. A FAIRLY AMPLIFIED 500-HPA PATTERN SHOULD BE IN PLACE AT THE
START OF THE PERIOD WHICH WILL SLOWLY DEAMPLIFY AS THE PERIOD PROGRESSES,
ALTHOUGH THIS PROCESS IS A BIT SLOWER TODAY THAN YESTERDAY. THE MANUAL 500-HPA
HEIGHT BLEND EMPHASIZES THE OPERATIONAL EUROPEAN AND THE CANADIAN ENSEMBLES,
BUT INCLUDES OTHER MODELS AS WELL. THE OPERATIONAL ECMWF AND GFS WERE INCLUDED
TO ADD MORE AMPLITUDE TO THE PATTERN WHICH MAY BE GETTING ERRONEOUSLY FLATTENED
BY OUTLIER MEMBERS IN THE ENSEMBLES. COMPARED TO YESTERDAY, THE 5-DAY MEAN
MANUAL HEIGHT BLEND IS DEEPER WITH THE MID-LEVEL TROUGH CENTERED SOUTH OF
ALASKA (PEAK ANOMALY -18 DM), ABOUT THE SAME WITH THE RIDGE CENTERED IN CENTRAL
CANADA (+12 DM), AND WEAKER WITH THE MID-LEVEL TROUGH IN THE EASTERN CONTIGUOUS
UNITED STATES (-3 DM). IN ADDITION, THE EXTENSION OF THE MID-LEVEL RIDGE FROM
CENTRAL CANADA IS STRONGER OVER THE WESTERN CONUS THAN YESTERDAY, WITH
ANOMALIES ABOVE +9 DM COVERING AREAS FROM THE GREAT BASIN TO THE NORTHERN
ROCKIES. NEAR-NORMAL 500-HPA HEIGHTS ARE PREDICTED ACROSS HAWAII BY MOST TOOLS,
WITH HEIGHTS INCREASING FROM WEAK MID-LEVEL TROUGH TO THE NORTHWEST AND A WEAK
RIDGE TO THE SOUTHEAST.
MEAN SURFACE HIGH PRESSURE IS EXPECTED TO STRETCH FARTHER SOUTH THAN FORECAST
YESTERDAY, WITH THE MEAN SYSTEM CENTERED AROUND THE GREAT LAKES OR MIDDLE
MISSISSIPPI VALLEY AND EXTENDING SOUTHWARD INTO THE LOWER MISSISSIPPI VALLEY
AND CENTRAL GULF COAST STATES, WEST TO SOUTHWEST OF THE WEAKENING MEAN
MID-LEVEL TROUGH. THIS SHOULD HOLD BELOW-NORMAL TEMPERATURES OVER MOST OF THE
CENTRAL AND EASTERN CONUS OUTSIDE THE NORTHERN AND SOUTHERN FRINGES OF THIS
REGION. THE TOOLS ARE IN FAIR TO GOOD AGREEMENT PLACING THE BEST CHANCES FOR
SUB-NORMAL TEMPERATURES (OVER 60%) FROM THE CENTRAL GREAT PLAINS THROUGH THE
LOWER OHIO VALLEY AND CENTRAL APPALACHIANS. THIS REPRESENTS AN INCREASE IN ODDS
FROM YESTERDAY, AND A FARTHER WEST EXTENSION, CONSISTENT WITH STRONGER SURFACE
HIGH PRESSURE IN OR NEAR THE MISSISSIPPI VALLEY. MEANWHILE, ABOVE-NORMAL
TEMPERATURES ARE ANTICIPATED FOR MOST OF THE WESTERN CONUS UNDER MID-LEVEL
RIDGING, WHICH MODELS SHOW AS SOMEWHAT STRONGER AND MORE RESILIENT THAN
YESTERDAY. WESTERN WASHINGTON IS AN EXCEPTION, UPSTREAM FROM THE MID-LEVEL
RIDGE AND CLOSER TO THE STRONG MID-LEVEL TROUGH CENTERED OVER THE GULF OF
ALASKA. WARMER THAN NORMAL CONDITIONS ARE FAVORED ACROSS HAWAII, CONSISTENT
WITH THE CONSOLIDATION AND GRADUALLY RISING 500-HPA HEIGHTS. FARTHER NORTH,
THERE REMAINS SOME UNCERTAINTY ACROSS ALASKA. RAW ENSEMBLE MEAN OUTPUTS SHOW
GREATLY ENHANCED ODDS FOR SUB-NORMAL TEMPERATURES ACROSS THE SOUTHERN MAINLAND
AND SOUTHEASTERN SECTIONS, BUT THE BIAS-CORRECTED VERSIONS REDUCE THE ANOMALIES
SOMEWHAT. THE REFORECAST TOOLS ARE MILDER STILL, AND THE CANADIAN ENSEMBLE
REFORECAST ACTUALLY FAVORS ABOVE-NORMAL TEMPERATURES ACROSS SOUTHEASTERN
ALASKA. THE ALASKA TEMPERATURE FORECAST IS A COMPROMISE OF THE TOOLS, FAVORING
COOLER THAN NORMAL CONDITIONS IN SOUTH-CENTRAL AND SOUTHEASTERN ALASKA, BUT
WITH SOMEWHAT LOWER CHANCES THAN DEPICTED BY THE CONSOLIDATION AND THE AUTO
BLEND.
ABOVE-NORMAL PRECIPITATION IS FAVORED OVER MUCH OF THE SOUTH-CENTRAL AND
SOUTHEASTERN CONUS, WITH SLIGHTLY LESS-ENHANCED ODDS STRETCHING NORTHWARD ALONG
MUCH OF THE EAST COAST. ENSEMBLE MEAN SURFACE PRESSURE FORECASTS ALL SHOW A
DECENT INFLOW OF MOISTURE FROM THE GULF INTO THE SOUTH-CENTRAL AND SOUTHEASTERN
CONUS WHILE SURFACE HIGH PRESSURE TO THE NORTH EXTENDS THROUGH THE OHIO VALLEY.
WHERE THESE CIRCULATION FEATURES CONVERGE, A QUASI-STATIONARY FRONT WILL BECOME
ESTABLISHED OVER THE SOUTHEAST, WHICH SHOULD SERVE AS A FOCUS FOR ENHANCED
RAINFALL. CHANCES FOR SURPLUS PRECIPITATION EXCEED 50% IN THESE AREAS. IN
ADDITION, SOME TOOLS SUGGEST A SURFACE LOW PRESSURE WAVE MAY FORM ALONG THIS
FRONT, WHICH WOULD FURTHER ENHANCE THE ODDS FOR A WET PERIOD. MEANWHILE,
ABOVE-NORMAL PRECIPITATION IS ALSO FAVORED IN MOST OF ALASKA AND THE PACIFIC
NORTHWEST NEAR OR UPSTREAM FROM THE ALASKAN MID-LEVEL TROUGH. THE BEST ODDS FOR
SURPLUS PRECIPITATION (OVER 50%) STRETCH FROM SOUTHEASTERN ALASKA INTO WESTERN
WASHINGTON UNDER CYCLONIC FLOW BETWEEN THE STRONG MID-LEVEL TROUGH AND THE
RIDGE AXIS OVER THE INTERIOR WEST. IN THE CONUS, INCREASED ODDS FOR DRIER THAN
NORMAL CONDITIONS STRETCH FROM THE CENTRAL WEST COAST NORTHEASTWARD THROUGH THE
NORTHERN ROCKIES, THEN EASTWARD ALONG THE NORTHERN FRINGE OF THE CONUS, AS FAR
EAST AS NORTHERN MAINE. THESE AREAS ARE UNDER THE MID-LEVEL RIDGE IN THE WEST
OR UPSTREAM FROM THE DECAYING MID-LEVEL TROUGH ALONG OR NEAR THE EAST COAST.
CONSISTENT WITH THE CONSOLIDATION, ODDS LEAN TOWARD WET WEATHER ACROSS HAWAII.
THE OFFICIAL 6-10 DAY 500-HPA HEIGHT BLEND CONSISTS OF 17% OF TODAY'S 6Z GFS
ENSEMBLE MEAN CENTERED ON DAY 8, 10% OF TODAY'S OPERATIONAL 6Z GFS CENTERED ON
DAY 8, 18% OF TODAY'S 0Z EUROPEAN ENSEMBLE MEAN CENTERED ON DAY 8, 30% OF
TODAY'S OPERATIONAL 0Z ECMWF CENTERED ON DAY 8, AND 25% OF TODAY'S 0Z CANADIAN
ENSEMBLE MEAN CENTERED ON DAY 8
FORECAST CONFIDENCE FOR THE 6-10 DAY PERIOD: ABOUT AVERAGE, 3 OUT OF 5. GOOD
AGREEMENT ON THE HEIGHT PATTERN AMONG THE ENSEMBLE MEANS EARLY IN THE PERIOD IS
OFFSET BY INCREASINGLY DIVERGENT SOLUTIONS TOWARD THE END OF THE PERIOD, ALONG
WITH SOME AREAS OF INCONSISTENCY AMONG THE DYNAMICAL AND STATISTICAL
TEMPERATURE AND PRECIPITATION TOOLS, AND THE UNCERTAINTY INHERENT IN A
SHIFTING, DEAMPLIFYING PATTERN THAT HAS BEEN HANDLED INCONSISTENTLY BY THE
MODELS IN RECENT DAYS.
8-14 DAY OUTLOOK FOR MAY 28 - JUN 03, 2025
ENSEMBLE MEAN SOLUTIONS FOR THE 8-14 DAY PERIOD DEPICT A SLOWLY PROGRESSIVE AND
DEAMPLIFYING 500-HPA CIRCULATION PATTERN, AND DYNAMICAL MODEL SOLUTIONS ARE
INCREASINGLY DIVERGENT BY THE END OF WEEK-2. THERE ARE SIGNIFICANT
UNCERTAINTIES REGARDING WHICH MID-LEVEL FEATURES DEAMPLIFY MORE QUICKLY THAN
OTHERS AND HOW PROGRESSIVE THE PATTERN BECOMES, RESULTING IN DISCREPANCIES IN
MODEL SOLUTIONS OF THE TIMING, PLACEMENT, AND MAGNITUDE OF INDIVIDUAL FEATURES.
THERE IS GENERAL AGREEMENT THAT THE MID-LEVEL TROUGH NEAR ALASKA WILL SLOWLY
FILL AND PERHAPS DRIFT EAST TOWARD THE CONUS WEST COAST, LEADING INTO A BROAD
DOWNSTREAM RIDGE WITH AN AXIS SOMEWHERE FROM THE INTERMOUNTAIN WEST TO THE
CENTRAL CONUS. THE POSITIVE 500-HPA HEIGHT ANOMALY MAXIMUM OVER CENTRAL CANADA
WILL ALSO WEAKEN, BUT AS IS THE CASE FARTHER SOUTH AND WEST, MODELS ARE NOT IN
GOOD AGREEMENT ON HOW THIS EVOLVES WITH TIME. SOLUTIONS RANGE FROM KEEPING WEAK
POSITIVE HEIGHT ANOMALIES IN THE NEIGHBORHOOD TO COMPLETELY QUASHING THE RIDGE
TO THE SOUTH, ENHANCING ABOVE-NORMAL HEIGHTS OVER THE CENTRAL AND/OR WESTERN
CONUS. WITH A LACK OF GUIDANCE FAVORING ONE SOLUTION OVER ANOTHER, THE MANUAL
BLEND IS AN EQUAL MIX OF THE EUROPEAN, 6Z GEFS, AND CANADIAN ENSEMBLE MEANS. A
FURTHER COMPLICATING FACTOR IS THE POTENTIAL FOR A TROPICAL OR SUBTROPICAL LOW
PRESSURE CENTER TO MOVE TOWARD THE FLORIDA PENINSULA NEAR THE END OF WEEK-2, AS
SHOWN BY THE GEFS. THE CANADIAN ENSEMBLE MEAN IS CONSIDERABLY WEAKER AND DRIER
WITH THIS POTENTIAL SYSTEM, AND THE EUROPEAN ENSEMBLE MEAN HAS LITTLE IF ANY
REFLECTION OF SURFACE LOW PRESSURE DEVELOPMENT.
ABOVE-NORMAL TEMPERATURES CONTINUE TO BE FAVORED ACROSS MOST OF WESTERN NORTH
AMERICA UNDER PREDOMINANTLY ABOVE-NORMAL 500-HPA HEIGHTS, STRETCHING EASTWARD
ACROSS THE NORTHERN TIER OF THE CONUS BEHIND THE MEANDERING, WEAKENING EASTERN
CONUS MID-LEVEL TROUGH. ENHANCED ODDS FOR ABOVE-NORMAL TEMPERATURES REACH AS
FAR EAST AS THE UPPER MISSISSIPPI VALLEY, MUCH OF THE GREAT LAKES REGION, AND
MOST OF NEW ENGLAND. FARTHER SOUTH AND EAST, SURFACE HIGH PRESSURE SHOULD KEEP
COOL AIR STUBBORNLY LOCKED INTO MUCH OF THE EAST-CENTRAL STATES AND SOUTHERN
GREAT PLAINS, WITH SOME MODERATION FORECAST CLOSER TO THE EAST COAST. MOST
TOOLS LOOK SIGNIFICANTLY COOLER IN THE SOUTHERN PLAINS AND ADJACENT LOCATIONS
DUE TO THE PLACEMENT OF THE MEAN HIGH PRESSURE CENTER FARTHER SOUTH IN THE
EAST-CENTRAL CONUS THAN ANTICIPATED YESTERDAY. WARMER THAN NORMAL CONDITIONS
ARE FAVORED ACROSS MUCH OF FLORIDA (CONSISTENT WITH MOST RAW AND
STATISTICALLY-ADJUSTED MODEL OUTPUT) AND OVER A LARGE PART OF THE WEST (UNDER
GENERALLY ABOVE-NORMAL 500-HPA HEIGHTS). PORTIONS OF THE PACIFIC NORTHWEST
REMAIN AN EXCEPTION, WITH LOWER HEIGHTS DRIFTING IN FROM THE NORTHWEST FAVORING
TEMPERATURES CLOSER TO OR SLIGHTLY BELOW NORMAL. BELOW-NORMAL TEMPERATURES ARE
FAVORED FOR MUCH OF MAINLAND AND SOUTHEASTERN ALASKA A LITTLE MORE ROBUSTLY
THAN YESTERDAY WITH SUB-NORMAL 500-HPA HEIGHTS AND MID-LEVEL TROUGHING LOOKING
A LITTLE MORE RESILIENT THAN IT DID YESTERDAY. ABOVE-NORMAL TEMPERATURES ARE
FAVORED TO PERSIST ACROSS HAWAII DURING WEEK-2 BY DYNAMICAL MODELS.
WITH DEAMPLIFYING MID-LEVEL HEIGHT ANOMALIES, THE PRECIPITATION ANOMALY PATTERN
IS UNCERTAIN OVER MUCH OF NORTH AMERICA. THE FORECAST IS ESSENTIALLY A
COMPROMISE OF THE AVAILABLE TOOLS. IN MOST AREAS WHERE ABOVE- OR BELOW-NORMAL
PRECIPITATION IS FAVORED, CHANCES GENERALLY REMAIN BELOW 40%. EXCEPTIONS ON THE
WET SIDE INCLUDE PORTIONS OF THE SOUTH-CENTRAL AND SOUTHEASTERN CONUS (WHERE A
LINGERING QUASI-STATIONARY FRONT COULD SERVE AS A FOCUS FOR INCREASED
RAINFALL), THE SOUTHERN HIGH PLAINS AND ADJACENT ROCKIES (WHERE MOISTURE MAY BE
FUNNELED IN FROM THE TROPICS BY A SURFACE HEAT-INDUCED LOW PRESSURE IN THE
SOUTHWEST), AND WESTERNMOST WASHINGTON (UPSTREAM FROM A MID-LEVEL TROUGH). THE
LATTER FEATURE ALSO ENHANCES THE ODDS FOR SURPLUS PRECIPITATION IN SOUTHEAST
ALASKA TO OVER 40 PERCENT, WITH WETNESS ONLY NOMINALLY FAVORED OVER THE REST OF
THE STATE. MEANWHILE, BELOW-NORMAL PRECIPITATION IS WEAKLY FAVORED ACROSS A
BROAD AREA FROM THE CENTRAL WEST COAST THROUGH THE GREAT BASIN, NORTHERN
INTERMOUNTAIN WEST, ROUGHLY THE NORTHERN HALVES OF THE ROCKIES AND PLAINS,
PARTS OF THE MIDDLE AND UPPER MISSISSIPPI VALLEY, AND WESTERN GREAT LAKES
REGION. HOWEVER, CHANCES FOR ABNORMAL DRYNESS EXCEED 40% ONLY IN A BAND FROM
THE NORTHERN GREAT BASIN INTO THE NORTHWESTERN ROCKIES. WET WEATHER IS WEAKLY
FAVORED FOR HAWAII, CONSISTENT WITH THE CONSOLIDATION AND WITH ITS PLACEMENT
DOWNSTREAM FROM A WEAK MID-LEVEL TROUGH AND UPSTREAM FROM A WEAK RIDGE.
THE OFFICIAL 8-14 DAY 500-HPA HEIGHT BLEND CONSISTS OF: 33% OF TODAY'S 6Z GFS
ENSEMBLE MEAN CENTERED ON DAY 11, 34% OF TODAY'S 0Z EUROPEAN ENSEMBLE MEAN
CENTERED ON DAY 11, AND 33% OF TODAY'S 0Z CANADIAN ENSEMBLE MEAN CENTERED ON
DAY 11
FORECAST CONFIDENCE FOR THE 8-14 DAY PERIOD: BELOW AVERAGE, 2 OUT OF 5. FAIR
AGREEMENT ON THE MEAN PATTERN IS OFFSET BY AREAS OF DISAGREEMENT IN THE RAW AND
DERIVED TEMPERATURE AND PRECIPITATION TOOLS, DIVERGENT DYNAMICAL SOLUTIONS
TOWARD THE END OF THE PERIOD, PLUS THE UNCERTAINTIES INHERENT TO AN EVOLVING,
DEAMPLIFYING PATTERN.
FORECASTER: RICH TINKER
NOTES:
AUTOMATED FORECASTS ARE ISSUED ON SATURDAY AND SUNDAY. OCCASIONALLY MANUAL
INTERVENTION IS NECESSARY TO ADDRESS QUALITY CONTROL AND CONSISTENCY ISSUES. IN
THESE CASES, FORECASTS ARE MANUALLY DRAWN BUT A FULL DISCUSSION IS NOT ISSUED.
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
JUNE 19.
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:
20040529 - 20010602 - 19640508 - 19890516 - 19860514
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:
20010601 - 20040529 - 19640509 - 19890516 - 19860512
6-10 DAY OUTLOOK TABLE
OUTLOOK FOR MAY 26 - 30 2025
STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN
WASHINGTON A A OREGON A A NRN CALIF A B
SRN CALIF A B IDAHO A B NEVADA A B
W MONTANA A B E MONTANA A B WYOMING A B
UTAH A N ARIZONA A A COLORADO A A
NEW MEXICO B A N DAKOTA A B S DAKOTA N B
NEBRASKA B B KANSAS B N OKLAHOMA B A
N TEXAS B A S TEXAS B A W TEXAS B A
MINNESOTA A B IOWA B B MISSOURI B N
ARKANSAS B A LOUISIANA B A WISCONSIN N B
ILLINOIS B N MISSISSIPPI B A MICHIGAN B B
INDIANA B N OHIO B N KENTUCKY B A
TENNESSEE B A ALABAMA B A NEW YORK B A
VERMONT N N NEW HAMP N A MAINE A N
MASS N 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 B A
N CAROLINA B A S CAROLINA B A GEORGIA B A
FL PNHDL N A FL PENIN A A AK N SLOPE B A
AK ALEUTIAN B N AK WESTERN N A AK INT BSN B A
AK S INT B A AK SO COAST B A AK PNHDL B A
8-14 DAY OUTLOOK TABLE
OUTLOOK FOR MAY 28 - JUN 03, 2025
STATE TEMP PCPN STATE TEMP PCPN STATE TEMP PCPN
WASHINGTON A A OREGON A N NRN CALIF A B
SRN CALIF A N IDAHO A B NEVADA A B
W MONTANA A B E MONTANA A B WYOMING A B
UTAH A N ARIZONA A A COLORADO A A
NEW MEXICO A A N DAKOTA A B S DAKOTA A B
NEBRASKA A B KANSAS A N OKLAHOMA B A
N TEXAS B A S TEXAS B A W TEXAS B A
MINNESOTA A B IOWA N B MISSOURI B N
ARKANSAS B N LOUISIANA B A WISCONSIN A B
ILLINOIS B N MISSISSIPPI B A MICHIGAN N B
INDIANA B N OHIO B N KENTUCKY B N
TENNESSEE B N ALABAMA B A NEW YORK N A
VERMONT A A NEW HAMP A A MAINE A A
MASS A A CONN N A RHODE IS N A
PENN N A NEW JERSEY N A W VIRGINIA B N
MARYLAND N A DELAWARE N A VIRGINIA N A
N CAROLINA N A S CAROLINA B A GEORGIA B A
FL PNHDL N A FL PENIN A A AK N SLOPE B A
AK ALEUTIAN B N AK WESTERN B A AK INT BSN B A
AK S INT B A AK SO COAST B A AK PNHDL B 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.
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