2001 North Platte, Nebraska (LBF)

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2001 NORTH PLATTE, NEBRASKA (LBF)

The climate of North Platte is characterized throughout the year by frequent rapid changes in the weather. During the winter, most North Pacific lows cross the country north of North Platte. The passage usually brings little or no snowfall, and only a moderate drop in temperature. Only when there is a major outbreak of cold air from Canada does the temperature fall to zero or below. The duration of below–zero temperature is hardly more than two mornings, and by the third or fourth day the temperature is ordinarily rising to the 40s or higher. Snowfall at the onset of a cold outbreak is usually less than 2 inches.

Only when a low moves from the middle Rockies through Nebraska, allowing easterly winds to draw moist air into the low circulation, does snowfall of appreciable amounts occur. Few of these storms move slowly enough, or are intense enough, to deposit much precipitation in the North Platte area. However, during some winters the cold outbreak and intense low from the mid–Rockies combine to produce severe cold and snow several inches in depth, with blizzard conditions following. During and after these snowfalls and blizzards, rail and highway traffic may be stalled until the snow is cleared. Widespread loss of unsheltered livestock and wild life results from such conditions.

The sudden and frequent weather changes of the winter continue through spring with decreasing intensity of temperature changes but increasing precipitation. The summer and fall months bring frequent changes from hot to cool weather. Most summer and fall precipitation is associated with thunderstorms, so the amounts are extremely variable. The surrounding area is occasionally damaged by locally severe winds and hailstorms.

Temperatures may reach into the upper 90s and lower 100s frequently during the summer months, but the elevation and clear skies bring rapid cooling after sunset to lows in the 60s or below by daybreak. Since the humidity is generally low, the extremely hot days of summer are not uncomfortable.

Based on the 1951–1980 period, the average first occurrence of 32 degrees Fahrenheit in the fall is September 24 and the average last occurrence in the spring is May 11.

NORMALS, MEANS, AND EXTREMES

NORTH PLATTE, NE (LBF)

LATITUDE:    LONGITUDE:    ELEVATION (FT):    TIME ZONE:    WBAN: 24023

41 07′ 19″ N  100 40′ 06″ W  GRND: 2778  BARO: 2781  CENTRAL (UTC + 6)

ELEMENTPORJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR
TEMPERATURE FNORMAL DAILY MAXIMUM3034.640.949.962.571.881.787.886.076.665.749.537.262.0
MEAN DAILY MAXIMUM5435.741.549.461.771.681.587.686.177.466.049.639.362.3
HIGHEST DAILY MAXIMUM507379869897107112105102948275112
YEAR OF OCCURRENCE199019621986199219531952195419541990199019801980JUL 1954
MEAN OF EXTREME MAXS.5459.365.075.684.789.296.399.998.494.286.372.662.482.0
NORMAL DAILY MINIMUM308.614.323.033.944.654.160.157.646.233.521.311.234.0
MEAN DAILY MINIMUM549.615.122.633.545.154.860.658.647.034.021.112.734.6
LOWEST DAILY MINIMUM50-23-22-227192939351710-13-34-34
YEAR OF OCCURRENCE197919811962197519891969199719761984199319761989DEC 1989
MEAN OF EXTREME MINS.54-11.0-5.72.317.429.241.148.545.929.717.53.9-7.917.6
NORMAL DRY BULB3021.627.636.548.258.267.974.071.861.449.735.424.248.0
MEAN DRY BULB5422.628.135.947.758.268.274.072.562.050.035.325.848.4
MEAN WET BULB1821.725.332.740.952.160.465.164.054.342.428.621.242.4
MEAN DEW POINT1815.919.125.432.946.255.160.059.548.435.422.815.736.4
NORMAL NO. DAYS WITH:
MAXIMUM 90300.00.00.00.31.06.013.611.33.80.30.00.036.3
MAXIMUM 323012.18.34.10.2*0.00.00.00.00.13.610.839.2
MINIMUM 323031.027.726.913.12.3*0.00.02.214.027.730.8175.7
MINIMUM 0308.53.50.60.00.00.00.00.00.00.00.85.118.5
H/CNORMAL HEATING DEG. DAYS30134510478845042344901115847488812656859
NORMAL COOLING DEG. DAYS3000002313628222250000713
RHNORMAL (PERCENT)3069686460636463646462677065
HOUR 00 LST3075767370737473757472757674
HOUR 06 LST3078797979828383848380807881
HOUR 12 LST3061595346505150504945546052
HOUR 18 LST3062564842474746464646566250
SPERCENT POSSIBLE SUNSHINE4963626264657177757270606167
W/OMEAN NO. DAYS WITH:
HEAVY FOG(VISBY 1/4 MI)491.42.42.21.11.10.81.12.02.01.92.31.720.0
THUNDERSTORMS490.00.10.82.66.59.99.98.13.91.50.20.043.5
CLOUDINESSMEAN:
SUNRISE-SUNSET (OKTAS)445.05.05.25.15.14.23.73.83.73.94.74.54.5
MIDNIGHT-MIDNIGHT (OKTAS)324.44.34.74.64.74.23.83.73.53.64.34.14.2
MEAN NO. DAYS WITH:
CLEAR448.47.27.57.06.810.112.111.712.812.58.89.8114.7
PARTLY CLOUDY448.77.57.79.010.010.712.011.48.48.48.07.8109.6
CLOUDY4413.913.615.814.014.39.26.98.08.810.113.213.4141.2
PRMEAN STATION PRESSURE(IN)2927.1027.0927.0027.0027.0027.1027.1027.1027.1027.1027.1127.1227.08
MEAN SEA-LEVEL PRES. (IN)1830.1130.1030.0029.9329.9129.9929.9329.9529.9930.0330.0630.1430.01
WINDSMEAN SPEED (MPH)469.39.811.612.611.410.49.69.19.79.79.99.310.2
PREVAIL. DIR (TENS OF DEGS)3031313111161111111830313111
MAXIMUM 2-MINUTE:
SPEED (MPH)544524746484955564645464556
DIR. (TENS OF DEGS)31363136313424313031293631
YEAR OF OCCURRENCE199719992000199919981999199919991999199719982000AUG 1999
MAXIMUM 5-SECOND:
SPEED (MPH)555625654596270755361535375
DIR. (TENS OF DEGS)32363101313324302831323630
YEAR OF OCCURRENCE199719992000199919981999199919991999199719972000AUG 1999
PRECIPITATIONNORMAL (IN)300.360.431.201.993.433.373.061.741.610.980.660.4719.30
MAXIMUM MONTHLY (IN)501.121.982.985.948.016.817.056.306.033.242.891.228.01
YEAR OF OCCURRENCE196019781992200119621965197919921963200019791977MAY 1962
MINIMUM MONTHLY (IN)49TT0.050.100.770.330.420.06T0.050.02TT
YEAR OF OCCURRENCE196419961994198919661952195519671953198819891988 FEB1996
MAXIMUM IN 24 HOURS (IN)500.751.152.262.422.953.803.152.932.532.241.480.793.80
YEAR OF OCCURRENCE199219711959197119621965196419571963200019791978JUN 1965
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01305.05.06.87.911.39.210.07.67.44.84.74.584.2
PRECIPITATION 1.00300.0*0.20.40.90.70.90.30.30.1*0.03.8
SNOWFALLNORMAL (IN)305.34.26.62.60.10.00.00.00.11.44.15.229.6
MAXIMUM MONTHLY (IN)5017.120.621.914.53.6TTT3.115.717.514.121.9
YEAR OF OCCURRENCE197619781980198419671995199619921985196919791973MAR 1980
MAXIMUM IN 24 HOURS (IN)5011.99.715.18.52.3TTT3.18.89.78.615.1
YEAR OF OCCURRENCE197619551980198419671995199519921985196920001968MAR 1980
MAXIMUM SNOW DEPTH (IN)531813189100035131018
YEAR OF OCCURRENCE194919931980194919671985196919791968MAR 1980
NORMAL NO. DAYS WITH:
SNOWFALL 1.0301.71.41.70.80.10.00.00.00.*0.51.11.48.7
PRECIPITATION (inches) 2001 NORTH PLATTE, NE (LBF)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
19720.160.080.651.193.182.963.580.951.460.621.120.4216.37
19730.400.102.451.453.850.882.872.823.981.260.541.1321.73
19740.270.080.421.171.643.862.271.150.240.610.040.4212.17
19750.260.170.921.772.126.122.510.250.560.141.150.2216.19
19760.990.142.032.802.882.430.922.872.031.180.080.0118.36
19770.180.272.894.855.901.314.411.791.480.180.391.2224.87
19780.521.980.401.964.841.753.701.920.330.431.030.9919.85
19790.860.092.781.462.963.377.051.490.451.322.890.2825.00
19800.520.822.560.772.591.890.643.040.341.000.130.0214.32
19810.070.052.722.475.372.325.092.480.250.601.940.4323.79
19820.200.150.991.426.322.351.781.181.262.440.731.0819.90
19830.330.251.542.123.203.323.741.980.140.561.560.4619.20
19840.360.871.205.012.824.370.941.380.392.410.690.7221.16
19850.550.140.441.844.010.873.981.163.231.241.090.7919.34
19860.021.100.703.772.801.702.571.221.021.580.190.2716.94
19870.161.551.651.013.193.952.811.191.161.671.260.8120.41
19880.720.030.372.023.593.123.033.931.590.050.40T18.85
19890.550.730.380.103.023.511.862.371.110.080.020.2814.01
19900.270.181.751.523.651.901.991.790.311.480.870.0915.80
19910.350.211.003.005.392.781.810.531.752.140.920.6720.55
19920.891.422.980.183.182.613.756.300.250.920.200.3323.01
19930.741.370.611.802.476.125.473.780.711.591.320.2226.20
19940.530.290.051.471.164.924.521.240.602.630.780.6618.85
19950.120.091.213.094.512.592.010.731.980.870.080.0217.30
19960.50T0.330.844.123.875.573.255.550.330.400.0324.79
1997T0.730.071.001.872.583.193.401.762.770.040.2017.61
19980.270.401.300.672.934.845.811.851.131.921.310.0122.44
19990.340.260.642.831.925.320.935.491.200.220.140.0519.34
20000.310.461.221.651.211.532.862.051.223.240.530.0416.32
20010.480.400.605.942.191.712.525.262.760.800.960.0723.69
POR=127 YRS0.420.500.972.073.003.252.742.181.541.020.530.4018.62
AVERAGE TEMPERATURE (F) 2001 NORTH PLATTE, NE (LBF)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
197220.729.940.746.658.168.470.470.861.246.429.817.246.7
197321.530.340.445.856.067.772.873.758.451.735.023.248.0
197416.033.040.150.059.566.577.567.157.552.934.824.248.3
197525.723.431.546.657.165.774.673.258.550.930.226.447.0
197617.832.734.047.453.164.672.870.659.845.230.528.246.4
197716.632.037.051.763.170.574.568.563.850.035.824.949.0
197811.214.735.148.456.668.274.571.065.449.232.114.645.1
19796.017.237.048.457.468.174.172.967.153.832.234.047.4
198025.126.835.550.560.272.578.074.063.748.938.532.050.5
198129.729.140.255.854.868.673.870.163.049.039.926.750.1
198217.128.136.344.857.363.475.073.161.749.233.328.147.3
198327.135.137.242.354.065.275.378.064.851.336.77.547.9
198420.433.234.143.358.168.073.775.558.448.037.222.547.7
198518.323.140.552.260.865.475.370.159.848.624.619.246.5
198631.627.044.348.958.071.475.671.363.050.435.530.250.6
198729.535.836.751.363.170.275.770.361.347.038.227.750.6
198816.426.537.848.560.774.674.573.462.048.738.030.349.3
198930.217.835.751.159.065.874.371.761.050.737.620.648.0
199030.630.940.048.556.771.173.774.067.650.238.121.950.3
199123.137.540.549.361.871.074.973.763.648.432.233.450.8
199232.137.341.850.658.765.768.566.563.049.932.422.549.1
199318.518.037.045.558.765.371.570.358.348.532.730.446.2
199424.023.741.547.862.671.770.572.665.452.037.429.149.9
199526.834.037.843.852.666.773.879.362.648.238.628.849.4
199620.930.131.347.356.668.571.270.059.148.630.725.046.6
199723.329.139.542.355.169.573.970.964.251.133.928.248.4
199826.034.732.646.359.664.175.372.468.549.739.327.749.7
199927.636.738.545.357.166.975.670.758.250.041.830.749.9
200027.333.940.948.060.767.976.577.563.651.124.621.649.5
200127.723.436.949.157.067.577.571.161.748.438.927.448.9
POR=127 YRS23.328.036.548.658.768.574.672.963.351.036.427.049.1

REFERENCE NOTES:

PAGE 1:

THE TEMPERATURE GRAPH SHOWS NORMAL MAXIMUM AND NORMAL MINIMUM DAILY TEMPERATURES (SOLID CURVES) AND THE ACTUAL DAILY HIGH AND LOW TEMPERATURES (VERTICAL BARS).

PAGE 2 AND 3:

H/C INDICATES HEATING AND COOLING DEGREE DAYS.

RH INDICATES RELATIVE HUMIDITY

W/O INDICATES WEATHER AND OBSTRUCTIONS

S INDICATES SUNSHINE.

PR INDICATES PRESSURE.

CLOUDINESS ON PAGE 3 IS THE SUM OF THE CEILOMETER AND SATELLITE DATA NOT TO EXCEED EIGHT EIGHTHS (OKTAS).

GENERAL:

T INDICATES TRACE PRECIPITATION, AN AMOUNT GREATER THAN ZERO BUT LESS THAN THE LOWEST REPORTABLE VALUE.

+ INDICATES THE VALUE ALSO OCCURS ON EARLIER DATES.

BLANK ENTRIES DENOTE MISSING OR UNREPORTED DATA.

NORMALS ARE 30–YEAR AVERAGES (1961–1990).

ASOS INDICATES AUTOMATED SURFACE OBSERVING SYSTEM.

PM INDICATES THE LAST DAY OF THE PREVIOUS MONTH.

POR (PERIOD OF RECORD) BEGINS WITH THE JANUARY DATA MONTH AND IS THE NUMBER OF YEARS USED TO COMPUTE THE MEAN. INDIVIDUAL MONTHS WITHIN THE POR MAY BE MISSING.

WHEN THE POR FOR A NORMAL IS LESS THAN 30 YEARS, THE NORMAL IS PROVISIONAL AND IS BASED ON THE NUMBER OF YEARS INDICATED.

0.* OR * INDICATES THE VALUE OR MEAN–DAYS–WITH IS BETWEEN 0.00 AND 0.05.

CLOUDINESS FOR ASOS STATIONS DIFFERS FROM THE NON–ASOS OBSERVATION TAKEN BY A HUMAN OBSERVER. ASOS STATION CLOUDINESS IS BASED ON TIME–AVERAGED CEILOMETER DATA FOR CLOUDS AT OR BELOW 12,000 FEET AND ON SATELLITE DATA FOR CLOUDS ABOVE 12,000 FEET.

THE NUMBER OF DAYS WITH CLEAR, PARTLY CLOUDY, AND CLOUDY CONDITIONS FOR ASOS STATIONS IS THE SUM OF THE CEILOMETER AND SATELLITE DATA FOR THE SUNRISE TO SUNSET PERIOD.

GENERAL CONTINUED:

CLEAR INDICATES 0–2 OKTAS, PARTLY CLOUDY INDICATES 3–6 OKTAS, AND CLOUDY INDICATES 7 OR 8 OKTAS. WHEN AT LEAST ONE OF THE ELEMENTS (CEILOMETER OR SATELLITE) IS MISSING, THE DAILY CLOUDINESS IS NOT COMPUTED.

WIND DIRECTION IS RECORDED IN TENS OF DEGREES (2 DIGITS) CLOCKWISE FROM TRUE NORTH. "00" INDICATES CALM. "36" INDICATES TRUE NORTH.

RESULTANT WIND IS THE VECTOR AVERAGE OF THE SPEED AND DIRECTION.

AVERAGE TEMPERATURE IS THE SUM OF THE MEAN DAILY MAXIMUM AND MINIMUM TEMPERATURE DIVIDED BY 2.

SNOWFALL DATA COMPRISE ALL FORMS OF FROZEN PRECIPITATION, INCLUDING HAIL.

A HEATING (COOLING) DEGREE DAY IS THE DIFFERENCE BETWEEN THE AVERAGE DAILY TEMPERATURE AND 65 F.

DRY BULB IS THE TEMPERATURE OF THE AMBIENT AIR.

DEW POINT IS THE TEMPERATURE TO WHICH THE AIR MUST BE COOLED TO ACHIEVE 100 PERCENT RELATIVE HUMIDITY.

WET BULB IS THE TEMPERATURE THE AIR WOULD HAVE IF THE MOISTURE CONTENT WAS INCREASED TO 100 PERCENT RELATIVE HUMIDITY.

ON JULY 1, 1996, THE NATIONAL WEATHER SERVICE BEGAN USING THE "METAR" OBSERVATION CODE THAT WAS ALREADY EMPLOYED BY MOST OTHER NATIONS OF THE WORLD. THE MOST NOTICEABLE DIFFERENCE IN THIS ANNUAL PUBLICATION WILL BE THE CHANGE IN UNITS FROM TENTHS TO EIGHTS (OKTAS) FOR REPORTING THE AMOUNT OF SKY COVER.

HEATING DEGREE DAYS (base 65 F) 2001 NORTH PLATTE, NE (LBF)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-732415169567104714791343967756567283347251
1973-7410021940789212901518889765445190626687
1974-750402563739001262121611601032558247627106
1975-7660228437103511911460929956521363707196
1976-770131786081028113314939208583958126709
1977-7823496458869123616621400924491275717518
1978-7952499488982156018281335862491259567989
1979-804115234197595712331102909439166106199
1980-8106107491790101910891000762283318265891
1981-82941014927491179147910308856012391116879
1982-8301816048494611381167833854672343906705
1983-842012841984017801379915953647236337332
1984-8500247519829131214401168752393156836899
1985-86023252502120514161029106063447921926821
1986-870149844687810741093810868420102155818
1987-88133613955179611521501110983949017036799
1988-89013128498803106710721316902430211676507
1989-902718043781513741061948771502259156371
1990-91151844577971331129076275446614956111
1991-92311485089779711010797714436219455829
1992-931860113466970131014361311862578204737401
1993-9422421851396510661263115172451713156579
1994-95389039582011061180863840631377676380
1995-961721675177861116135910041037527283406855
1996-97312145031021123312841001782673306147035
1997-981017113452926113312028419985511951146552
1998-99203946776411491151785815586248546060
1999-008922745869010571164894738503169495966
2000-010142424120413371152115686847325587
2001-051465117731160
COOLING DEGREE DAYS (base 65 F) 2001 NORTH PLATTE, NE (LBF)
YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANNUAL
197200004313719920264000645
197300001112126027829300702
197400052411739411540300698
197500010118931126039700727
1976000056224719227000533
197700022617430514964000720
1978000121174307218117500843
1979000027156294262123000862
19800001027243411289740001054
198100010914128816847100664
1982000087031427668000736
198300008103331412128100983
198400002712928133155200825
19850001432100326189100000761
198600031120133421743000809
1987000164817635220835000835
198800014129330128246000964
198900021359929522067200739
19900001510205291289165500980
1991000359194317276112200963
199200013316813511660100424
19930000158821219424600539
19940001063213183251111000831
199500000125298449103400979
199600003314920416544300598
199700005156295206962900787
199800003794326237150000844
19990000911934319228000691
20000000421403623931070001044
200100041316839420152300835
SNOWFALL (inches) 2001 NORTH PLATTE, NE (LBF)
YEARJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNTOTAL
1972-730.00.00.00.88.08.73.80.41.61.70.00.025.0
1973-740.00.00.0T4.314.14.21.02.30.70.00.026.6
1974-750.00.00.00.0T4.52.22.63.93.00.00.016.2
1975-760.00.00.00.810.91.217.11.65.2T0.00.036.8
1976-770.00.00.01.00.6T2.52.29.98.10.00.024.3
1977-780.00.00.0T0.36.46.220.62.0TT0.035.5
1978-790.00.00.0T7.610.36.30.35.92.3T0.032.7
1979-800.00.00.02.917.52.35.29.121.97.40.00.066.3
1980-810.00.00.00.61.2T0.70.50.50.40.00.03.9
1981-820.00.00.0T5.36.44.41.76.40.90.00.025.1
1982-830.00.00.01.02.09.71.60.15.95.40.00.025.7
1983-840.00.0T0.012.17.35.39.68.814.50.20.057.8
1984-850.00.0T0.30.98.78.50.82.10.00.00.021.3
1985-860.00.03.1T13.08.10.28.73.8T0.00.036.9
1986-870.00.00.02.01.02.61.69.27.20.10.00.023.7
1987-880.00.00.01.38.27.212.60.63.82.10.00.035.8
1988-890.00.00.0T2.5T6.110.64.30.3T0.023.8
1989-90T0.0TTT2.25.91.95.30.3TT15.6
1990-910.00.00.02.09.70.84.11.15.6TT0.023.3
1991-920.00.00.07.31.61.85.41.25.10.3T0.022.7
1992-93TT0.0T2.23.910.117.22.72.0TT38.1
1993-94T0.0TT3.93.310.66.00.411.5TT35.7
1994-95T0.00.00.04.69.00.12.77.49.60.0T33.4
1995-96T0.00.74.10.80.54.9T3.44.00.00.018.4
1996-97T0.0T5.21.00.912.10.54.40.00.0
1997-980.0T0.05.71.63.24.44.28.80.0TT27.9
1998-99T0.00.0T5.70.74.55.22.71.20.0T20.0
1999-00TT0.00.01.41.18.13.60.8TTT15.0
2000-01TT2.80.010.61.07.45.34.26.3TT37.6
2001-TT0.00.01.63.4
POR=49 YRSTT0.21.53.84.45.45.16.33.00.2T29.9

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