PUBLIC INFORMATION STATEMENT
 
 NOUS45 KFGZ 071615 PNSFGZ  PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 915 AM MST TUE FEB 7 2006  ...RECORD DRY CONDITIONS CONTINUE OVER NORTHERN ARIZONA...  FOR THE PERIOD OF SEPTEMBER 1ST 2005 THROUGH FEBRUARY 6TH 2006...  FLAGSTAFF HAS RECEIVED ONLY 2.49 INCHES OF PRECIPITATION (INCLUDING  MELTED SNOW). THIS NOW SURPASSES THE PREVIOUS DRIEST AMOUNT WHICH  WAS SET IN THE 1950-1951 SEASON. THE 2005-2006 PERIOD NOW REPRESENTS  THE LEAST AMOUNT OF PRECIPITATION EVER RECORDED FOR THAT PERIOD IN  THE HISTORICAL RECORDS WHICH BEGAN IN 1898. NORMALLY 10.43 INCHES  SHOULD BE MEASURED IN THIS PERIOD. LAST YEAR...19.72 INCHES OF  PRECIPITATION HAD OCCURRED DURING THIS SAME PERIOD.  ONLY 1.6 INCHES OF SNOWFALL HAVE BEEN RECORDED FOR THE SNOW  SEASON...WHICH CONTINUES TO BE THE LEAST AMOUNT EVER RECORDED TO  THIS DATE IN HISTORY. THE PREVIOUS LEAST AMOUNT OF SNOWFALL RECORDED  THROUGH FEBRUARY 6TH WAS 2.5 INCHES SET DURING THE WINTER OF  1930-1931. THE NORMAL SEASONAL SNOWFALL FOR THIS PERIOD SHOULD BE  56.0 INCHES. LAST YEAR...95.1 INCHES OF SNOWFALL HAD FALLEN DURING  THIS SAME PERIOD.  THESE DRY CONDITIONS EXIST ACROSS ALL OF NORTHERN ARIZONA WITH MANY  LOCATIONS RECORDING 20 TO 40 PERCENT OF THEIR NORMAL PRECIPITATION  FOR THE FALL AND WINTER MONTHS SO FAR. WINSLOW HAS ONLY RECEIVED 17%  (0.62") OF THEIR NORMAL PRECIPITATION FOR THE SEPT 1ST THROUGH FEB  6TH PERIOD.   ...LA NINA CONDITIONS EXPECTED THROUGH SPRING...  NOAA HAS ALSO ANNOUNCED THE OFFICIAL RETURN OF LA NINA. LA NINA IS  THE PERIODIC COOLING OF OCEAN WATERS IN THE EAST-CENTRAL EQUATORIAL  PACIFIC...WHICH CAN IMPACT THE ALIGNMENT OF WEATHER PATTERNS AROUND  THE GLOBE. LA NINA TYPICALLY FAVORS DRIER THAN NORMAL CONDITIONS FOR  ARIZONA DURING THE WINTER SEASON. LA NINA EVENTS RECUR APPROXIMATELY  EVERY THREE TO FIVE YEARS. THE LAST LA NINA EVENT WAS A MULTI-YEAR  EVENT FROM 1998-2001.   THE INITIAL STARTING YEARS OF LA NINA EVENTS SINCE 1949 ARE LISTED  IN THE TABLE BELOW...ALONG WITH THE AMOUNT OF TOTAL SNOWFALL  RECEIVED FOR THE SNOWFALL SEASON...THE SNOWFALL THAT OCCURRED FROM  FEB 1ST THROUGH JUNE 30TH...AND LIQUID PRECIPITATION (INCLUDING  MELTED SNOW) THAT OCCURRED FROM FEB 1ST THROUGH JUNE 30TH OF THOSE  YEARS:  STARTING    TOTAL     SNOW FROM         LIQ. PRECIP. FROM YEAR        SNOW    FEB 1 - JUN 30       FEB 1 - JUN 30  1949-1950   63.3"       20.7"                 3.30" 1954-1955   67.6"       17.8"                 5.37" 1961-1962  128.9"       48.6"                 7.05" 1964-1965* 166.7"*     123.6"*               13.47"* 1967-1968  150.4"       44.1"                 5.24" 1970-1971   56.6"       29.3"                 3.51" 1973-1974   70.0"       12.8"                 1.84" 1983-1984   32.0"        7.6"                 2.09" 1988-1989   77.7"       29.1"                 4.29" 1995-1996   28.5"       16.2"                 1.97" 1998-1999   72.0"       53.3"                 5.18"  NORMALS 1971-2000  109.4"       57.7"                 7.70"  *THE 1964-1965 SEASON LA NINA EVENT ENDED EARLY IN THE WINTER  SEASON...WITH WELL ABOVE NORMAL PRECIPITATION OCCURRING IN  FEBRUARY-MAY. IT PROBABLY IS NOT RELEVANT FOR THIS CURRENT WINTER  SEASON AS LA NINA CONDITIONS ARE CURRENTLY FORECAST TO CONTINUE INTO  LATE SPRING, POSSIBLY INTO THE SUMMER.  WITH THE REMOVAL OF THE 1964-1965 DATA...THE AVERAGE TOTAL SNOWFALL  DURING THESE PREVIOUS LA NINA EVENTS WAS 74.7 INCHES (68% OF  NORMAL). MUCH OF THE SNOWFALL DURING THESE WINTERS FELL EARLY IN THE  SEASON...SO THAT WHEN ONLY THE FEB-JUNE PERIOD IS EXAMINED...ONLY  28.0 ADDITIONAL INCHES OF SNOW WERE RECEIVED (49% OF NORMAL). WHEN  LIQUID PRECIPITATION FOR THE FEB-JUNE PERIOD IS EXAMINED FOR THESE  LA NINA EVENTS...ONLY 3.98 INCHES FELL ON AVERAGE (52% OF NORMAL).  CLEARLY THE TENDENCY FOR LA NINA TO BRING DRIER THAN NORMAL  CONDITIONS TO NORTHERN ARIZONA CAN BE SEEN IN THESE STATISTICS.    NOT SURPRISINGLY...THE EXTENDED RANGE OUTLOOK FOR NORTHERN ARIZONA  FOR THE MONTHS OF FEBRUARY THROUGH APRIL CALLS FOR ENHANCED  PROBABILITIES OF ABOVE NORMAL TEMPERATURES AND BELOW NORMAL  PRECIPITATION.
			
									
						Offical statement from NWS Flag in regards...........
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The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or STORM2K.- wall_cloud
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