Station Name: MC GRATH/ARPT AK WMO Station Number: 70231 National I.D. Number: 00505769 Country: UNITED STATES OF AMERICA WMO Region: REGION IV - NORTH & CENTRAL AMERICA Latitude: 62d 58m N Longitude: 155d 37m W Elevation: 104 m In the following tables, byr = beginning year of normals or extremes data period eyr = ending year of normals or extremes data period NA = Not Applicable, data not submitted or not computed * = value > 0 but < units resolution Ann-NCDC = annual value computed by NCDC from monthly values provided by Members ========================================================== The normals data and climate variable descriptions are presented in these tables as provided by the WMO Member country. ========================================================== Element 01: Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value #_YEARS (Statistic 98): Number of Years used to Calculate Normal -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN #_YEARS Month -------------------------- Jan -22.6 30 Feb -19.2 30 Mar -12.1 30 Apr -3.1 30 May 6.9 30 Jun 12.9 30 Jul 14.8 30 Aug 12.4 30 Sep 6.8 30 Oct -4.1 30 Nov -15.3 30 Dec -21.1 30 Annual -3.6 30 Ann-NCDC -3.6 NA -------------------------- Element 02: Maximum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value MAX_VAL (Statistic 04): Maximum Value DATEMAX (Statistic 12): Date (Year/Day) of Occurrence of Maximum Daily Value #_YEARS (Statistic 98): Number of Years used to Calculate Normal ------------------------------------------ byr: 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 Statistic: MEAN MAX_VAL DATEMAX #_YEARS Month ------------------------------------------ Jan -17.6 7.8 196120 30 Feb -12.8 10.0 198011 30 Mar -4.8 10.6 196231 30 Apr 2.8 15.6 198027 30 May 12.5 27.2 198130 30 Jun 18.6 32.2 196915 30 Jul 20.2 31.7 197730 30 Aug 17.5 31.7 197721 30 Sep 11.6 23.9 197403 30 Oct -.4 15.0 196917 30 Nov -10.9 9.4 196712 30 Dec -16.3 9.4 197729 30 Annual 1.7 NA NA 30 Ann-NCDC 1.7 NA NA NA ------------------------------------------ Element 03: Minimum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value MIN_VAL (Statistic 05): Minimum Value DATEMIN (Statistic 14): Date (Year/Day) of Occurrence of Minimum Daily Value #_YEARS (Statistic 98): Number of Years used to Calculate Normal ------------------------------------------ byr: 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 Statistic: MEAN MIN_VAL DATEMIN #_YEARS Month ------------------------------------------ Jan -27.7 -59.4 198927 30 Feb -25.7 -47.2 196905 30 Mar -19.4 -46.1 196617 30 Apr -8.9 -40.0 198501 30 May 1.4 -13.9 196409 30 Jun 7.3 -1.1 197407 30 Jul 9.4 .6 198101 30 Aug 7.2 -3.9 198428 30 Sep 1.9 -12.8 198326 30 Oct -7.8 -33.3 198230 30 Nov -19.8 -47.2 199030 30 Dec -25.9 -55.0 196127 30 Annual -9.0 NA NA 30 Ann-NCDC -9.0 NA NA NA ------------------------------------------ Element 04: Wet Bulb Temperature (deg C) SD3HRLY (Statistic 60): Standard Deviation of 3-Hourly Values MN3HRLY (Statistic 94): Mean of 3-Hourly Observations #_YEARS (Statistic 98): Number of Years used to Calculate Normal ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: SD3HRLY MN3HRLY #_YEARS Month ---------------------------------- Jan 11.6 -21.7 29 Feb 9.9 -18.7 28 Mar 9.1 -12.3 29 Apr 6.3 -4.4 30 May 3.8 3.8 30 Jun 3.0 9.3 30 Jul 2.7 11.5 30 Aug 3.4 9.8 30 Sep 3.9 4.6 30 Oct 6.2 -4.8 30 Nov 8.6 -15.0 30 Dec 11.5 -20.7 29 Annual 14.1 -4.9 27 Ann-NCDC NA -4.9 NA ---------------------------------- Element 05: Dew Point Temperature (deg C) SD3HRLY (Statistic 60): Standard Deviation of 3-Hourly Values MN3HRLY (Statistic 94): Mean of 3-Hourly Observations #_YEARS (Statistic 98): Number of Years used to Calculate Normal ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: SD3HRLY MN3HRLY #_YEARS Month ---------------------------------- Jan 12.7 -25.4 29 Feb 11.0 -23.1 28 Mar 10.0 -17.3 29 Apr 6.9 -9.3 30 May 4.1 -1.1 30 Jun 3.3 5.4 30 Jul 2.7 8.7 30 Aug 3.6 7.5 30 Sep 4.6 1.8 30 Oct 6.7 -7.4 30 Nov 9.6 -18.1 30 Dec 12.5 -24.2 29 Annual 14.8 -8.5 27 Ann-NCDC NA -8.5 NA ---------------------------------- Element 06: Precipitation (mm) MEANMLY (Statistic 15): Mean Monthly Value MIN_MLY (Statistic 20): Minimum Monthly Value QUIN20% (Statistic 22): First Quintile QUIN40% (Statistic 23): Second Quintile QUIN60% (Statistic 24): Third Quintile QUIN80% (Statistic 25): Fourth Quintile MAX_MLY (Statistic 26): Maximum Monthly Value #_YEARS (Statistic 98): Number of Years used to Calculate Normal -------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 Statistic: MEANMLY MIN_MLY QUIN20% QUIN40% QUIN60% QUIN80% MAX_MLY #_YEARS Month -------------------------------------------------------------------------- Jan 19.0 2.5 7.1 12.4 19.0 29.2 45.2 30 Feb 16.8 0.0 4.6 9.7 16.3 26.7 63.0 30 Mar 20.3 0.0 3.3 9.7 18.5 33.3 70.1 30 Apr 20.8 0.8 4.6 10.7 19.0 33.5 70.6 30 May 22.1 4.6 10.2 16.0 22.6 32.3 78.0 30 Jun 37.3 13.0 22.4 30.5 39.1 50.8 88.1 30 Jul 52.1 14.0 26.7 39.6 53.8 74.2 136.1 30 Aug 62.7 20.3 43.9 54.9 65.8 80.0 99.6 30 Sep 50.3 4.8 15.7 30.2 48.8 78.2 141.2 30 Oct 35.6 3.6 16.5 25.9 36.6 52.1 69.8 30 Nov 32.8 0.5 9.7 19.0 31.5 51.8 110.2 30 Dec 35.6 2.8 10.4 20.6 34.0 55.9 127.5 30 Annual 405.4 NA NA NA NA NA NA 30 Ann-NCDC 405.4 NA NA NA NA NA NA NA -------------------------------------------------------------------------- Element 08: Maximum 24-Hour Precipitation (mm) MAX_DLY (Statistic 11): Maximum Daily Value DATEMAX (Statistic 12): Date (Year/Day) of Occurrence of Maximum Daily Value #_YEARS (Statistic 98): Number of Years used to Calculate Normal ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: MAX_DLY DATEMAX #_YEARS Month ---------------------------------- Jan 20.8 198906 30 Feb 24.1 198907 30 Mar 24.6 198217 30 Apr 26.2 196424 30 May 17.8 198422 30 Jun 21.6 198816 30 Jul 38.1 197516 30 Aug 38.4 196124 30 Sep 34.8 198706 30 Oct 23.4 198216 30 Nov 26.9 198510 30 Dec 39.6 197023 30 Annual NA NA NA Ann-NCDC NA NA NA ---------------------------------- Element 09: Snowfall (cm) MEDIAN (Statistic 02): Median Value MAX_DLY (Statistic 11): Maximum Daily Value DATEMAX (Statistic 12): Date (Year/Day) of Occurrence of Maximum Daily Value MEANMLY (Statistic 15): Mean Monthly Value QUAR25% (Statistic 58): First Quartile QUAR75% (Statistic 59): Third Quartile #_YEARS (Statistic 98): Number of Years used to Calculate Normal ------------------------------------------------------------------ byr: 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 Statistic: MEDIAN MAX_DLY DATEMAX MEANMLY QUAR25% QUAR75% #_YEARS Month ------------------------------------------------------------------ Jan 31.5 24.6 198906 31.5 16.0 43.9 30 Feb 25.4 27.9 197604 28.4 9.7 40.4 30 Mar 23.9 30.5 198217 30.7 10.7 45.5 30 Apr 14.0 32.3 196424 22.4 5.8 30.7 30 May Trace 17.3 197107 2.3 Trace 2.8 30 Jun .0 Trace 197201 Trace .0 .0 30 Jul .0 .0 199031 .0 .0 .0 30 Aug .0 .0 199031 .0 .0 .0 30 Sep Trace 8.9 196530 2.0 .0 1.8 30 Oct 32.5 21.6 197108 30.7 18.0 39.1 30 Nov 50.3 27.2 198509 47.2 25.7 65.5 30 Dec 43.2 27.2 199019 51.8 31.5 55.9 30 Annual NA NA NA 247.0 NA NA NA Ann-NCDC NA NA NA NA NA NA NA ------------------------------------------------------------------ Element 11: Relative Humidity (%) MN00LST (Statistic 70): Mean of Observations at 0000 LST MN03LST (Statistic 73): Mean of Observations at 0300 LST MN06LST (Statistic 76): Mean of Observations at 0600 LST MN09LST (Statistic 79): Mean of Observations at 0900 LST MN12LST (Statistic 82): Mean of Observations at 1200 LST MN15LST (Statistic 85): Mean of Observations at 1500 LST MN18LST (Statistic 88): Mean of Observations at 1800 LST MN21LST (Statistic 91): Mean of Observations at 2100 LST MN3HRLY (Statistic 94): Mean of 3-Hourly Observations ---------------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Statistic: MN00LST MN03LST MN06LST MN09LST MN12LST MN15LST MN18LST MN21LST MN3HRLY Month ---------------------------------------------------------------------------------- Jan 72.8 72.7 72.9 72.7 71.6 70.6 72.2 72.5 72.2 Feb 71.2 72.1 72.3 72.0 67.6 62.3 64.3 70.3 68.7 Mar 69.6 72.7 73.5 72.0 58.6 52.0 52.9 62.9 64.3 Apr 67.9 73.4 76.5 67.4 54.5 49.2 50.2 57.9 62.1 May 67.0 75.9 78.3 63.5 49.8 44.6 45.0 51.5 59.5 Jun 71.9 80.6 81.2 66.9 53.3 48.1 48.3 55.2 63.2 Jul 78.2 84.4 85.5 74.3 61.2 54.9 55.3 63.6 69.7 Aug 83.6 86.9 88.7 82.4 67.5 59.9 60.4 72.3 75.2 Sep 80.2 83.6 85.2 82.5 68.0 59.0 60.3 73.4 74.0 Oct 80.8 82.1 82.7 82.4 75.8 68.9 72.2 78.5 77.9 Nov 77.4 77.5 77.8 77.4 75.5 74.2 76.8 77.2 76.7 Dec 74.4 74.3 74.4 74.6 74.2 73.8 74.1 74.3 74.0 Annual 74.5 77.9 78.9 73.9 64.8 59.8 61.0 67.4 69.6 Ann-NCDC 74.6 78.0 79.1 74.0 64.8 59.8 61.0 67.5 69.8 ---------------------------------------------------------------------------------- Element 11: Relative Humidity (%) Statistic 98: Number of Years used to Calculate Normal Qualifier: 70: Mean of Observations at 0000 LST Qualifier: 73: Mean of Observations at 0300 LST Qualifier: 76: Mean of Observations at 0600 LST Qualifier: 79: Mean of Observations at 0900 LST Qualifier: 82: Mean of Observations at 1200 LST Qualifier: 85: Mean of Observations at 1500 LST Qualifier: 88: Mean of Observations at 1800 LST Qualifier: 91: Mean of Observations at 2100 LST Qualifier: 94: Mean of 3-Hourly Observations ---------------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 70 73 76 79 82 85 88 91 94 Month ---------------------------------------------------------------------------------- Jan 29 29 29 29 29 29 29 29 29 Feb 29 29 29 29 30 30 29 29 28 Mar 29 30 30 30 30 30 29 29 29 Apr 30 30 30 30 30 30 30 30 30 May 30 30 30 30 30 30 30 30 30 Jun 30 30 30 30 30 30 30 30 30 Jul 30 30 30 30 30 30 30 30 30 Aug 30 30 30 30 30 30 30 30 30 Sep 30 30 30 30 30 30 30 30 30 Oct 30 30 30 30 30 30 30 30 30 Nov 30 30 30 30 30 30 30 30 30 Dec 29 30 30 30 30 30 29 29 29 Annual 28 28 28 28 29 29 28 28 27 Ann-NCDC NA NA NA NA NA NA NA NA NA ---------------------------------------------------------------------------------- Element 12: Sea Level Pressure (hPa) MN3HRLY (Statistic 94): Mean of 3-Hourly Observations #_YEARS (Statistic 98): Number of Years used to Calculate Normal -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MN3HRLY #_YEARS Month -------------------------- Jan 1012.1 29 Feb 1010.6 29 Mar 1010.7 29 Apr 1010.5 29 May 1010.7 30 Jun 1011.1 30 Jul 1013.7 30 Aug 1011.7 30 Sep 1008.7 30 Oct 1005.9 30 Nov 1008.4 30 Dec 1010.4 29 Annual 1010.5 28 Ann-NCDC 1010.4 NA -------------------------- Element 16: Wind Speed (m/sec) MN3HRLY (Statistic 94): Mean of 3-Hourly Observations ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 1.4 Feb 2.1 Mar 2.6 Apr 3.2 May 3.2 Jun 3.0 Jul 2.9 Aug 2.8 Sep 2.8 Oct 2.7 Nov 1.9 Dec 1.5 Annual 2.5 Ann-NCDC 2.5 ------------------ Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 000.0 degrees Qualifier: 022.5 degrees Qualifier: 045.0 degrees Qualifier: 067.5 degrees Qualifier: 090.0 degrees Qualifier: 112.5 degrees Qualifier: 135.0 degrees Qualifier: 157.5 degrees Qualifier: 180.0 degrees ---------------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 000.0 022.5 045.0 067.5 090.0 112.5 135.0 157.5 180.0 Month ---------------------------------------------------------------------------------- Jan .441 .036 .015 .014 .029 .039 .032 .020 .025 Feb .313 .081 .022 .012 .028 .039 .027 .022 .024 Mar .238 .071 .023 .021 .042 .042 .026 .020 .036 Apr .143 .050 .020 .027 .048 .051 .030 .024 .048 May .116 .046 .027 .039 .056 .049 .038 .038 .064 Jun .108 .033 .018 .028 .037 .036 .032 .043 .092 Jul .123 .028 .021 .019 .028 .037 .033 .046 .120 Aug .137 .028 .021 .028 .038 .048 .043 .050 .102 Sep .142 .052 .025 .034 .052 .059 .039 .036 .072 Oct .170 .068 .019 .024 .048 .062 .048 .032 .036 Nov .343 .041 .014 .016 .037 .054 .042 .022 .029 Dec .406 .037 .017 .015 .030 .041 .033 .023 .029 Annual NA NA NA NA NA NA NA NA NA Ann-NCDC NA NA NA NA NA NA NA NA NA ---------------------------------------------------------------------------------- Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 202.5 degrees Qualifier: 225.0 degrees Qualifier: 247.5 degrees Qualifier: 270.0 degrees Qualifier: 292.5 degrees Qualifier: 315.0 degrees Qualifier: 337.5 degrees Qualifier: 360.0 degrees -------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 202.5 225.0 247.5 270.0 292.5 315.0 337.5 360.0 Month -------------------------------------------------------------------------- Jan .021 .023 .024 .034 .066 .063 .051 .069 Feb .020 .021 .034 .052 .078 .070 .060 .096 Mar .030 .025 .036 .052 .082 .068 .078 .108 Apr .038 .039 .041 .064 .091 .080 .090 .118 May .059 .052 .052 .060 .083 .061 .071 .089 Jun .087 .074 .066 .069 .085 .058 .062 .071 Jul .101 .079 .068 .066 .074 .052 .054 .051 Aug .085 .058 .057 .065 .073 .052 .059 .057 Sep .050 .034 .041 .061 .084 .063 .067 .087 Oct .028 .025 .029 .050 .077 .072 .085 .126 Nov .025 .020 .028 .052 .076 .063 .062 .074 Dec .021 .021 .025 .046 .070 .061 .056 .068 Annual NA NA NA NA NA NA NA NA Ann-NCDC NA NA NA NA NA NA NA NA -------------------------------------------------------------------------- Element 17: Wind Direction (degrees) PREVAIL (Statistic 41): Prevailing #_YEARS (Statistic 98): Number of Years used to Calculate Normal -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: PREVAIL #_YEARS Month -------------------------- Jan 360.0 29 Feb 360.0 29 Mar 360.0 29 Apr 360.0 30 May 360.0 30 Jun 180.0 30 Jul 180.0 30 Aug 180.0 30 Sep 360.0 30 Oct 360.0 30 Nov 292.5 30 Dec 292.5 29 Annual 360.0 NA Ann-NCDC NA NA -------------------------- Element 51: Number Days with Thunder (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .1 Feb .0 Mar .0 Apr .0 May .5 Jun 2.7 Jul 2.8 Aug 1.0 Sep .1 Oct .0 Nov .1 Dec * Annual 7.3 Ann-NCDC 7.3 ------------------ Element 61: Number Days with Haze/Smoke (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .0 Feb .0 Mar .0 Apr .0 May .0 Jun .4 Jul 1.1 Aug .6 Sep .1 Oct .0 Nov .0 Dec .1 Annual 2.3 Ann-NCDC 2.3 ------------------ Element 63: Number Days with Blowing Dust/Sand (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .0 Feb .0 Mar .0 Apr .0 May .0 Jun .0 Jul .0 Aug .0 Sep .0 Oct .0 Nov .0 Dec .0 Annual .0 Ann-NCDC 0.0 ------------------ Element 83: Number Days Maximum Temperature GE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 10.0 deg C Qualifier: 35.0 deg C -------------------------- byr: 1961 1961 eyr: 1990 1990 Qualifier: 10.0 35.0 Month -------------------------- Jan .0 .0 Feb * .0 Mar .1 .0 Apr 2.7 .0 May 21.4 .0 Jun 29.5 .0 Jul 30.9 .0 Aug 30.3 .0 Sep 20.1 .0 Oct 1.3 .0 Nov .0 .0 Dec .0 .0 Annual 136.3 .0 Ann-NCDC 136.3 0.0 -------------------------- Element 85: Number Days Minimum Temperature LE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 0.0 deg C Qualifier: 10.0 deg C -------------------------- byr: 1961 1961 eyr: 1990 1990 Qualifier: 0.0 10.0 Month -------------------------- Jan 30.9 31.0 Feb 27.9 28.0 Mar 30.5 31.0 Apr 28.0 30.0 May 11.5 31.0 Jun .2 26.0 Jul .0 19.3 Aug 1.0 25.1 Sep 10.1 29.8 Oct 27.8 31.0 Nov 29.7 30.0 Dec 30.9 31.0 Annual 228.5 343.2 Ann-NCDC 228.5 343.2 -------------------------- Element 95: Number Days with Precipitation GE Threshold (count) Qualifier: 1.0 mm MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 5.1 Feb 4.0 Mar 5.1 Apr 5.0 May 5.8 Jun 8.1 Jul 10.3 Aug 11.7 Sep 9.0 Oct 7.7 Nov 6.8 Dec 7.3 Annual 85.9 Ann-NCDC 85.9 ------------------ Element 97: Number Days with Freezing Rain/Drizzle (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .1 Feb .1 Mar * Apr .0 May .0 Jun .0 Jul .0 Aug .0 Sep .0 Oct .1 Nov .4 Dec .5 Annual 1.2 Ann-NCDC 1.2 ------------------ Element 98: Number Days with Blowing Snow (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .5 Feb .3 Mar .6 Apr .2 May * Jun .0 Jul .0 Aug .0 Sep .0 Oct .1 Nov .3 Dec .6 Annual 2.6 Ann-NCDC 2.6 ------------------ Element AA: Number Days with Rain/Drizzle (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 1.8 Feb 1.5 Mar 2.0 Apr 5.1 May 15.6 Jun 20.0 Jul 20.7 Aug 21.4 Sep 17.9 Oct 7.4 Nov 2.4 Dec 2.0 Annual 117.8 Ann-NCDC 117.8 ------------------ Element AB: Number Days with Snow/Hail (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 15.1 Feb 13.9 Mar 14.3 Apr 13.1 May 3.8 Jun .1 Jul .0 Aug .0 Sep 2.5 Oct 17.9 Nov 19.6 Dec 18.5 Annual 118.8 Ann-NCDC 118.8 ------------------ Element AC: Number Days with Fog/Mist (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 12.1 Feb 7.4 Mar 6.0 Apr 5.8 May 3.7 Jun 3.3 Jul 6.8 Aug 9.3 Sep 7.8 Oct 10.1 Nov 10.4 Dec 12.2 Annual 94.9 Ann-NCDC 94.9 ------------------ Element AD: Number Days with Weather Phenomena (count) #_YEARS (Statistic 98): Number of Years used to Calculate Normal ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 30 Feb 30 Mar 30 Apr 30 May 30 Jun 30 Jul 30 Aug 30 Sep 30 Oct 30 Nov 30 Dec 30 Annual NA Ann-NCDC NA ------------------