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Historical Snow Survey Information

Airborne Gamma Survey Snow Water Equivalent Archive Map

Snow Survey Observations for 1999     (link to file)

Listed SWE values of -900.0 means that the snow was too deep to measure with gamma detectors, i.e. SWE greater than 100 centimeters or 39 inches.

Flight Line Survey Date SWE (cm) Latitude Longitude
MN2401998-11-278.447.388995.9797
MN2411998-11-274.447.249995.9223
MN2421998-11-274.147.174595.8791
MN2431998-11-270.346.846895.6348
MN2441998-11-279.746.901995.3402
MN2451998-11-275.646.916695.1510
MN2481998-11-272.146.690295.0923
MN2491998-11-270.046.247595.0697
MN5011999-01-062.644.232995.9192
MN5021999-01-061.144.325295.7464
MN5031999-01-062.144.245195.6850
MN5041999-01-061.644.176295.6313
MN5051999-01-061.144.116195.4522
MN5061999-01-061.844.030595.4364
MN5071999-01-062.644.130295.1076
MN5081999-01-061.844.322495.1386
MN5091999-01-061.644.392395.2653
MN5101999-01-061.644.231295.3705
MN5111999-01-062.344.233695.1951
MN5121999-01-062.344.247395.0589
MN5131999-01-062.644.265094.9262
MN5141999-01-061.844.275294.8093
MN5151999-01-060.344.246394.7365
MN5161999-01-062.844.325694.6235
IL1221999-01-096.141.316188.0610
IL1251999-01-095.640.819588.4171
IL2021999-01-094.641.285487.6007
IL2031999-01-094.441.215087.7125
IN1011999-01-098.741.624884.8971
IN1021999-01-095.441.436084.9643
IN1031999-01-097.941.370584.9104
IN1041999-01-098.941.360185.1597
IN1051999-01-096.140.825485.0706
IN1061999-01-097.240.739784.8728
IN1071999-01-097.240.930685.0204
IN1081999-01-096.140.904484.8682
IN1091999-01-096.941.257584.9639
IN1101999-01-096.941.247184.8551
IN1111999-01-096.741.142584.8744
IN2041999-01-095.441.503585.9052
IN3031999-01-097.741.444886.3777
IN3041999-01-097.741.364986.5114
IN3061999-01-096.441.522586.8246
IN3071999-01-096.741.265986.7308
IN3101999-01-096.741.256586.4201
IN3131999-01-095.441.384387.0206
IN3151999-01-097.241.140487.3542
IN3171999-01-095.141.312987.4764
IN3311999-01-097.241.208486.1074
IN3341999-01-097.441.119386.5968
IN3361999-01-096.740.906086.3836
IN3371999-01-095.440.919686.5398
IN3391999-01-096.740.925586.8994
IN3411999-01-095.140.752286.6332
IN3421999-01-096.940.672286.8634
IN3441999-01-095.141.070785.5434
IN3471999-01-095.940.907485.8589
IN3481999-01-096.440.940285.8592
IN3491999-01-096.940.904586.0351
IN3501999-01-096.740.949386.1559
IN3511999-01-096.440.859986.2258
IN3521999-01-096.741.491286.1477
IN1121999-01-107.940.577584.9512
NY4061999-01-1010.542.425878.6336
NY4071999-01-1013.842.653078.9078
NY4081999-01-1013.042.362379.0528
NY4091999-01-1013.542.450479.0667
NY4101999-01-1013.042.293779.3920
NY4111999-01-1011.742.219479.1615
PA1081999-01-106.741.796080.1657
PA1091999-01-106.741.815279.7954
PA1101999-01-106.941.973579.3406
PA1111999-01-105.941.883978.3627
PA1121999-01-107.941.524378.7775
OH1441999-01-114.941.167182.6589
OH1451999-01-114.441.136282.4085
OH1461999-01-114.941.168582.0208
OH1471999-01-117.441.313881.2313
OH1481999-01-117.941.614681.0491
OH1491999-01-117.741.623680.8782
MI1251999-01-154.643.602185.0271
MI1261999-01-153.143.345285.6301
MI1271999-01-156.143.234385.0800
MI1291999-01-156.143.182185.4098
MI1301999-01-155.143.008884.6541
MI1311999-01-154.443.415484.7970
MI1321999-01-154.943.805284.4933
MI1331999-01-155.443.470784.2372
MI1341999-01-154.443.182184.2386
MI1351999-01-154.143.299084.4774
MI1361999-01-152.143.616684.4787
MI1371999-01-154.143.797184.0773
MI1541999-01-155.443.812483.1343
MI2141999-01-158.242.816084.1726
MI2161999-01-156.442.992784.4632
MI2211999-01-155.142.829983.9589
MI2221999-01-156.142.885883.4716
MI2231999-01-156.442.949783.2016
MI2251999-01-154.143.275383.5964
MI2261999-01-155.443.404483.2855
MI2271999-01-156.743.591682.9444
MI2281999-01-154.643.337282.9534
MI2301999-01-155.943.093083.1771
MI2311999-01-154.443.116183.9383
MI2331999-01-157.942.465384.2480
MI2341999-01-157.743.062284.0485
MI3011999-01-153.942.185284.2456
MI3031999-01-156.142.148084.0126
MI3131999-01-158.441.937484.1902
MI3151999-01-157.741.829484.1087
IL1111999-01-163.941.948189.1471
IL1141999-01-164.941.464088.9568
IL1151999-01-165.441.565888.4407
IL1161999-01-166.741.826388.4709
IL1181999-01-165.641.196488.5347
IL1191999-01-164.941.037389.5310
IL1201999-01-165.941.176988.9718
IL1221999-01-165.641.316188.0610
IL1301999-01-165.141.756688.9137
IL2011999-01-165.441.090387.6795
IL2091999-01-165.940.879487.8758
IN3041999-01-166.441.364986.5114
IN3061999-01-167.441.522586.8246
IN3101999-01-166.141.256586.4201
IN3171999-01-165.141.312987.4764
IN3231999-01-166.141.006287.3591
IN3291999-01-165.940.664387.4588
IN3351999-01-166.441.061886.6971
IN3401999-01-166.740.743686.9592
MI2091999-01-167.741.878285.5798
IN1041999-01-178.441.360185.1597
IN1091999-01-177.941.257584.9639
IN1111999-01-177.241.142584.8744
IN2031999-01-176.741.649185.6243
IN2041999-01-175.941.503585.9052
IN2061999-01-176.941.450885.5053
IN2071999-01-176.741.591685.2796
IN3311999-01-177.241.208486.1074
IN3431999-01-176.741.200185.3947
IN3461999-01-176.941.066185.8090
IN3511999-01-177.240.859986.2258
MI1061999-01-177.241.702184.6505
MI2011999-01-175.642.160285.2908
MI2021999-01-178.742.165185.7157
MI2051999-01-175.642.187484.7858
MI2071999-01-177.941.843785.9407
MI2091999-01-176.741.878285.5798
MI2101999-01-175.641.853485.3039
MI2111999-01-176.442.128584.9476
MI2121999-01-173.942.812085.1809
MI2151999-01-177.742.562684.9719
MI2181999-01-178.942.413284.6667
MI2191999-01-177.442.437285.7492
MI2361999-01-177.742.610985.9440
OH1011999-01-176.741.565184.7796
OH1021999-01-177.241.648784.6603
OH1031999-01-177.441.372484.7561
IN1021999-01-185.641.436084.9643
IN1061999-01-187.240.739784.8728
MI3041999-01-187.242.115683.8878
MI3091999-01-185.941.967283.7537
MI3101999-01-186.741.937483.5410
MI3111999-01-185.641.877283.8580
OH1041999-01-185.941.513084.3126
OH1051999-01-186.441.341784.4638
OH1061999-01-186.941.143084.3876
OH1071999-01-186.941.300284.6531
OH1081999-01-188.241.183984.1761
OH1091999-01-188.741.088184.1584
OH1101999-01-187.441.025184.4665
OH1231999-01-186.740.916984.6617
MI1131999-01-204.644.342284.9401
MI1141999-01-205.944.023084.9090
MI1151999-01-202.144.168284.8043
MI1161999-01-201.844.300384.5267
MI1171999-01-204.644.066884.5365
MI1181999-01-204.144.217784.2756
MI1211999-01-204.143.576085.6513
MI1231999-01-204.643.826885.1558
MI1241999-01-204.943.888985.3538
MI1381999-01-207.944.535084.1166
ME1011999-01-3116.345.530670.5859
ME1021999-01-3114.545.586070.2217
ME1031999-01-3117.345.643070.3358
ME1041999-01-3117.145.417670.1099
ME1051999-01-3112.045.057170.5857
ME1071999-01-3113.344.887070.2708
ME1081999-01-3112.844.826970.2919
ME1091999-01-3115.544.815270.1832
ME1111999-01-3115.045.564169.8540
ME1121999-01-3111.545.377769.9550
ME1131999-01-3113.845.374069.6730
ME2121999-01-3113.545.319669.2600
ME2131999-01-3113.345.184369.2034
NH1051999-01-317.444.399371.5057
NH1061999-01-3113.345.149971.2247
VT1061999-01-318.944.273973.2533
VT1071999-01-317.444.106473.1944
VT1091999-01-316.943.901273.1404
NY1051999-02-018.444.467173.8143
NY4061999-02-018.742.425878.6336
NY4081999-02-019.742.362379.0528
NY4091999-02-019.242.450479.0667
NY4101999-02-019.242.293779.3920
NY4111999-02-018.442.219479.1615
NY4151999-02-017.943.154678.2027
NY4171999-02-019.243.820375.3073
NY4181999-02-019.243.654175.0945
NY4191999-02-0115.043.785675.6297
NY4231999-02-0116.143.470975.1835
NY4261999-02-015.942.647377.9185
NY4281999-02-016.742.254977.9438
NY4361999-02-017.443.480176.1327
NY4371999-02-016.143.962276.0241
NY4381999-02-0115.843.702175.9388
NY4401999-02-016.943.107975.6746
PA1101999-02-012.341.973579.3406
PA1111999-02-015.441.883978.3627
NY1011999-02-038.944.854273.5530
NY1021999-02-038.744.815073.6273
NY1031999-02-036.744.637173.5952
NY1041999-02-039.744.612873.7980
NY2011999-02-0318.343.386174.7356
NY2021999-02-0314.843.293974.9934
NY2031999-02-039.443.176975.0153
NY2041999-02-0315.343.136074.8038
NY2051999-02-0316.143.165874.6171
NY2061999-02-0311.243.081874.5233
NY3011999-02-037.242.395475.9481
NY3031999-02-037.242.410075.7150
NY4201999-02-0311.043.853975.5595
NY4211999-02-0313.043.675075.4430
NY4221999-02-0316.143.462575.4754
NY4241999-02-0314.843.518675.2829
NY4251999-02-0313.343.720675.3806
NY4391999-02-0310.743.368775.6938
NY4441999-02-034.644.190675.2293
VT1011999-02-034.144.936772.8449
VT1021999-02-036.144.930072.9343
VT1031999-02-036.144.688573.0534
VT1041999-02-036.444.685273.1458
VT1051999-02-034.444.275373.0857
VT1081999-02-038.243.834473.3231
VT1101999-02-0312.542.886973.0641
VT1111999-02-0315.343.433572.8426
NY3021999-02-049.742.558075.7029
NY5091999-02-040.042.156975.0471
NY5101999-02-040.042.124975.3652
NY5111999-02-040.042.115975.4733
PA1011999-02-040.041.795075.3586
PA1021999-02-040.041.741075.2004
PA1031999-02-040.041.690075.1504
PA1051999-02-040.041.771675.5172
PA1061999-02-040.041.585975.1584
PA1191999-02-040.040.096578.6131
PA1201999-02-040.040.241877.9566
PA1211999-02-040.040.386578.2945
PA1221999-02-040.040.746778.1091
PA1231999-02-040.040.915777.5429
PA1241999-02-040.040.982578.2448
PA1281999-02-040.041.766977.1731
PA1291999-02-040.041.569277.1784
PA1301999-02-040.041.660276.7317
PA1311999-02-040.041.841275.9639
IA1011999-02-065.143.075695.2843
IA1021999-02-060.843.359796.1857
IA1041999-02-063.443.136996.1664
IA1051999-02-061.343.441596.3121
IA1061999-02-062.643.192695.7318
IA1071999-02-062.143.247695.8287
IA1081999-02-064.443.427095.3467
IA1091999-02-063.143.236195.5423
IA1101999-02-064.443.251795.1382
IA1271999-02-062.842.888795.6877
IA1291999-02-064.442.835395.3627
MN3101999-02-062.644.111996.3176
MN3141999-02-061.643.987796.1382
MN3151999-02-062.343.558596.2209
MN3201999-02-061.143.883796.2029
MN3381999-02-061.843.569895.1791
ND1031999-02-065.948.8906103.1474
ND1041999-02-064.648.8899102.6671
ND1071999-02-065.948.6865102.2200
ND1151999-02-066.148.6291101.4850
ND1161999-02-068.448.8004100.1925
ND1181999-02-065.648.0100100.8343
ND1191999-02-067.248.0852100.5925
ND1201999-02-067.248.4022101.8175
ND1251999-02-066.448.7691101.9123
ND1301999-02-067.248.3069101.6110
ND2011999-02-068.748.359599.6045
ND2051999-02-0610.548.492199.1191
ND2121999-02-069.748.450198.5041
ND2241999-02-0611.247.837598.6524
ND2251999-02-069.247.772098.2911
ND2301999-02-0610.248.697799.1909
ND2361999-02-068.747.521697.8416
ND2431999-02-067.248.898398.2276
ND4021999-02-068.747.251298.9843
ND4041999-02-068.747.239697.6597
ND4081999-02-064.946.114498.5713
ND4091999-02-063.146.214198.0787
ND4111999-02-065.146.791897.1263
ND4141999-02-065.946.340397.2098
ND4171999-02-066.746.449497.3967
ND4201999-02-068.947.210197.4144
ND4231999-02-065.946.709998.6992
ND4241999-02-065.146.522898.5778
ND4341999-02-064.946.846897.8723
SD2021999-02-065.645.786797.8374
SD2041999-02-063.144.871297.8252
SD2051999-02-061.844.882996.8957
SD2061999-02-061.144.739596.8155
SD2071999-02-065.145.830098.6421
SD2081999-02-066.945.600898.1031
SD2111999-02-062.845.779798.9210
SD4021999-02-061.844.276396.6241
SD4121999-02-063.443.970196.8574
SK3011999-02-0611.749.0902102.0344
SK3021999-02-0610.749.1725102.5776
SK3031999-02-069.749.2256103.1456
SK3131999-02-068.949.1537103.6293
MB1011999-02-077.449.187298.4323
MB1021999-02-078.249.265398.7519
MB1031999-02-078.949.122699.0667
MB1041999-02-077.249.121399.6702
MB1171999-02-076.749.583498.3541
MB1181999-02-076.749.567499.4726
MB1191999-02-077.449.816999.0503
MB1201999-02-0711.049.910099.5906
MB1211999-02-074.149.973498.7887
MB1221999-02-074.649.1893100.3853
MB1231999-02-0710.749.2182101.1349
MB1241999-02-0713.549.5829100.7460
MB1251999-02-079.249.4506100.2510
MB1261999-02-0710.549.9172100.2729
MB1271999-02-078.450.2776100.6099
MB1281999-02-079.450.3362101.0464
MB1291999-02-079.750.4784100.7840
MB1301999-02-078.450.7588101.1531
MB1311999-02-077.950.6243100.4766
MB1321999-02-078.750.3314100.1626
MB1331999-02-074.949.571398.5454
MN1011999-02-076.948.711096.9288
MN1021999-02-077.448.550696.8992
MN1031999-02-078.748.385196.8464
MN1041999-02-078.448.275596.8070
MN1051999-02-0710.048.130196.7415
MN1061999-02-079.748.007596.6679
MN1071999-02-0710.247.685296.5607
MN1081999-02-079.447.453896.5300
MN1091999-02-075.947.128596.4920
MN1101999-02-075.946.819996.4949
MN1111999-02-074.446.528696.4849
MN1121999-02-074.446.362096.5503
MN1151999-02-078.948.567896.7025
MN1171999-02-0711.048.421496.3750
MN1191999-02-0710.047.811696.2940
MN1201999-02-077.747.420396.2889
MN1281999-02-076.146.927096.2658
MN1301999-02-0710.748.127495.9777
MN1311999-02-0711.248.568696.1555
MN2241999-02-0714.848.479995.6772
ND2161999-02-076.148.717097.4349
ND2171999-02-075.648.515497.4553
ND2181999-02-076.748.310797.4440
ND2191999-02-077.948.147097.4598
ND2201999-02-074.648.313497.6290
ND2211999-02-075.948.608597.7425
ND2291999-02-0711.047.600497.4445
ND2321999-02-075.648.928397.5182
ND2331999-02-074.648.866397.7651
ND4121999-02-075.446.703297.0771
ND4181999-02-076.947.253697.2037
ND4191999-02-0710.047.493497.2015
SK1011999-02-0710.049.4980101.6981
SK1021999-02-0710.049.9385101.6627
SK1031999-02-077.950.7226101.6849
SK1041999-02-078.450.3053101.6766
SK1051999-02-078.951.0821102.2567
SK1061999-02-076.451.2111103.0197
SK1071999-02-075.951.4785103.2045
SK1081999-02-076.951.9394102.8230
SK1091999-02-075.951.6997102.4415
SK1101999-02-075.951.4416101.8811
SK1111999-02-078.451.0222101.6069
SK3061999-02-079.449.5299103.6228
SK3101999-02-078.249.7609104.0585
SK3111999-02-0710.250.0142103.1457
SK3121999-02-079.249.5135104.1341
SK3201999-02-078.949.6501102.4353
MB1051999-02-089.749.144196.0890
MB1061999-02-086.449.323496.6034
MB1071999-02-085.649.138796.8796
MB1081999-02-086.949.187197.6506
MB1091999-02-084.649.359797.8208
MB1101999-02-084.649.404797.2679
MB1111999-02-084.649.587496.5887
MB1121999-02-083.149.590197.5674
MB1131999-02-082.149.892197.7452
MB1141999-02-083.450.122797.5459
MB1151999-02-084.950.448197.2564
MB1161999-02-083.150.085296.6709
MN1241999-02-083.646.031096.4178
ND4401999-02-084.946.144796.6279
ND4411999-02-084.945.984796.6290
ND4421999-02-083.646.006696.7016
LS1871999-02-2217.646.355987.0944
LS3901999-02-2217.146.577587.6475
MI1451999-02-2211.245.897387.5021
MI1601999-02-2215.546.543988.1081
MI1621999-02-2220.646.433987.4614
WI2081999-02-229.245.205088.6206
WI2101999-02-228.945.648888.1843
WI3101999-02-227.444.870790.0871
WI3111999-02-223.644.537790.1714
WI4021999-02-223.644.606789.8418
WI4031999-02-227.244.863889.8484
WI4071999-02-225.944.800388.7847
WI4101999-02-220.044.525088.8040
MI1491999-02-2315.546.205688.0417
MI1571999-02-2316.846.120488.7325
MI1581999-02-2315.346.174488.3965
MI1591999-02-2314.846.084888.2019
WI1191999-02-238.445.135690.2147
WI2021999-02-239.445.493589.4246
WI2031999-02-238.745.232389.5582
WI2041999-02-238.245.086089.8191
WI2051999-02-237.945.035989.3096
WI2121999-02-2314.045.972788.7399
WI2131999-02-2312.845.873788.8282
UT1031999-02-240.039.8400111.5048
UT1041999-02-246.439.8303111.5721
UT1051999-02-249.439.7340111.6252
UT1061999-02-242.839.6552111.5779
UT1071999-02-240.039.5518111.6453
UT1081999-02-240.039.4882111.5222
UT1091999-02-2420.639.2638111.4509
UT1101999-02-249.439.2554111.5398
UT1111999-02-240.039.3144111.6852
UT1121999-02-246.439.6970111.4215
UT1131999-02-2429.038.6194111.7268
UT1141999-02-240.038.4009111.8573
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SK3081999-04-058.949.5329102.2495
SK3101999-04-052.149.7609104.0585
SK3111999-04-054.950.0142103.1457
SK3141999-04-055.149.9501103.9822
SK3151999-04-052.849.2211103.3550
SK3161999-04-051.349.4118103.7988
SK3171999-04-052.149.3196103.8181
SK3191999-04-057.249.3366102.2829
SK3201999-04-057.249.6501102.4353
MB1091999-04-063.149.359797.8208
MB1121999-04-063.649.590197.5674
MB1171999-04-064.149.583498.3541
MB1181999-04-061.649.567499.4726
MB1201999-04-060.049.910099.5906
MB1241999-04-060.049.5829100.7460
MB1251999-04-060.049.4506100.2510
MB1261999-04-060.049.9172100.2729
MB1331999-04-063.949.571398.5454
SK1011999-04-068.949.4980101.6981
SK1021999-04-064.649.9385101.6627
MB1011999-04-074.649.187298.4323
MB1021999-04-074.649.265398.7519
MB1031999-04-075.949.122699.0667
MB1041999-04-073.949.121399.6702
MB1081999-04-074.649.187197.6506
MB1101999-04-074.149.404797.2679
ND1161999-04-077.948.8004100.1925
ND1171999-04-075.148.8153100.5712
ND2021999-04-0710.748.636799.5008
ND2051999-04-0713.048.492199.1191
ND2301999-04-079.448.697799.1909
ND2311999-04-0710.748.397498.8933
ND2401999-04-076.148.536698.6792
ND2411999-04-077.248.703498.8497
ME1101999-04-090.044.832569.8927
ME1151999-04-093.445.038769.5404
ME2021999-04-0913.846.077669.0453
ME2051999-04-0912.245.881968.4706
ME2071999-04-095.645.641268.8768
ME2101999-04-096.745.406268.5893
ME2121999-04-096.145.319669.2600
ME2151999-04-094.445.093068.8066
SJ1101999-04-095.146.580668.0106
SJ1111999-04-091.646.479167.7271
SJ1121999-04-098.246.413667.5939
SJ1131999-04-098.246.136867.4344
SJ1141999-04-0912.246.276867.0158
SJ1151999-04-099.246.050166.7988
SJ1161999-04-096.446.262167.9854
SJ1171999-04-096.745.847767.6173
SJ1351999-04-0911.546.802268.6154
SJ1361999-04-0913.546.653868.6010
SJ1401999-04-0911.546.473968.4705
SJ1411999-04-0911.546.361868.5808
SJ1421999-04-0915.846.268168.4792
SJ1431999-04-0910.746.205769.4462
SJ1501999-04-0913.846.623268.9329
SJ1511999-04-0917.646.571369.6739
SJ1521999-04-0911.746.672469.4551
SJ1531999-04-090.046.080867.8028
SJ1011999-04-1020.447.340067.2791
SJ1031999-04-1013.047.178967.3345
SJ1041999-04-1010.047.026267.4395
SJ1061999-04-106.947.250768.0685
SJ1071999-04-1011.046.850267.4398
SJ1081999-04-108.446.805367.6602
SJ1091999-04-106.746.834567.8795
SJ1181999-04-1018.147.800468.9195
SJ1191999-04-1013.547.755668.7625
SJ1211999-04-1012.547.572468.7631
SJ1221999-04-1017.647.626769.1106
SJ1231999-04-1021.947.648869.2920
SJ1241999-04-1013.347.562269.0166
SJ1251999-04-1011.547.464569.0927
SJ1261999-04-1018.147.504369.5128
SJ1271999-04-1017.647.351069.3829
SJ1281999-04-1021.447.332569.1929
SJ1291999-04-1013.847.255368.8334
SJ1301999-04-108.247.058969.0443
SJ1311999-04-1011.747.116368.7209
SJ1321999-04-1016.347.431468.7760
SJ1331999-04-1013.347.053468.3924
SJ1341999-04-104.447.268868.2749
SJ1371999-04-109.446.790368.3395
SJ1441999-04-1024.746.795770.2115
SJ1451999-04-1028.046.526570.3175
SJ1461999-04-1026.046.494970.2290
SJ1471999-04-1020.146.342070.3473
SJ1481999-04-1015.346.133570.4350
NH1061999-04-1111.545.149971.2247
SJ1051999-04-1119.447.193767.8955
SJ1381999-04-115.146.863668.1605
SJ1391999-04-119.746.588168.4003


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