Historical Snow Survey Information
Airborne Gamma Survey Snow Water Equivalent Archive Map
Snow Survey Observations for 1981 (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 |
| ND107 | 1981-02-25 | 1.1 | 48.6865 | 102.2200 |
| ND113 | 1981-02-25 | 3.1 | 48.6752 | 100.9575 |
| ND114 | 1981-02-25 | 1.4 | 48.7581 | 101.3966 |
| ND117 | 1981-02-25 | 2.0 | 48.8153 | 100.5712 |
| ND120 | 1981-02-25 | 1.3 | 48.4022 | 101.8175 |
| ND121 | 1981-02-25 | 2.3 | 48.4913 | 101.1693 |
| ND122 | 1981-02-25 | 1.7 | 48.8364 | 101.2883 |
| ND125 | 1981-02-25 | 1.5 | 48.7691 | 101.9123 |
| ND129 | 1981-02-25 | 1.0 | 48.2766 | 101.4543 |
| ND130 | 1981-02-25 | 1.9 | 48.3069 | 101.6110 |
| ND307 | 1981-02-25 | 24.6 | 47.1354 | 101.7928 |
| ND308 | 1981-02-25 | 28.7 | 47.3502 | 101.8856 |
| ND309 | 1981-02-25 | 28.4 | 47.3641 | 101.9197 |
| ND310 | 1981-02-25 | 27.0 | 46.9956 | 100.5216 |
| ND312 | 1981-02-25 | 20.1 | 46.5564 | 103.2017 |
| ND313 | 1981-02-25 | 18.8 | 46.5225 | 103.0296 |
| ND315 | 1981-02-25 | 17.2 | 46.4068 | 102.7033 |
| ND316 | 1981-02-25 | 18.6 | 46.7238 | 102.7819 |
| ND317 | 1981-02-25 | 16.1 | 46.8960 | 102.5805 |
| ND318 | 1981-02-25 | 17.0 | 46.3762 | 102.2267 |
| ND323 | 1981-02-25 | 26.9 | 47.0985 | 100.7801 |
| ND324 | 1981-02-25 | 25.4 | 47.1176 | 101.2571 |
| MN102 | 1981-02-26 | 1.7 | 48.5506 | 96.8992 |
| MN103 | 1981-02-26 | 2.2 | 48.3851 | 96.8464 |
| MN104 | 1981-02-26 | 1.3 | 48.2755 | 96.8070 |
| MN105 | 1981-02-26 | 2.3 | 48.1301 | 96.7415 |
| MN106 | 1981-02-26 | 2.4 | 48.0075 | 96.6679 |
| MN110 | 1981-02-26 | 0.7 | 46.8199 | 96.4949 |
| MN111 | 1981-02-26 | 0.1 | 46.5286 | 96.4849 |
| MN112 | 1981-02-26 | 0.0 | 46.3620 | 96.5503 |
| MN113 | 1981-02-26 | 0.0 | 46.1138 | 96.4828 |
| MN121 | 1981-02-26 | 0.0 | 47.5227 | 96.6729 |
| ND217 | 1981-02-26 | 1.8 | 48.5154 | 97.4553 |
| ND218 | 1981-02-26 | 1.8 | 48.3107 | 97.4440 |
| ND219 | 1981-02-26 | 1.7 | 48.1470 | 97.4598 |
| ND229 | 1981-02-26 | 0.0 | 47.6004 | 97.4445 |
| ND235 | 1981-02-26 | 0.0 | 47.7810 | 97.2065 |
| ND404 | 1981-02-26 | 0.0 | 47.2396 | 97.6597 |
| ND405 | 1981-02-26 | 0.0 | 47.0179 | 97.5644 |
| ND407 | 1981-02-26 | 19.8 | 46.9823 | 97.0587 |
| ND411 | 1981-02-26 | 0.0 | 46.7918 | 97.1263 |
| ND412 | 1981-02-26 | 0.0 | 46.7032 | 97.0771 |
| ND414 | 1981-02-26 | 0.0 | 46.3403 | 97.2098 |
| ND415 | 1981-02-26 | 0.0 | 46.2551 | 96.9724 |
| ND416 | 1981-02-26 | 0.0 | 46.7592 | 97.5769 |
| ND417 | 1981-02-26 | 0.6 | 46.4494 | 97.3967 |
| ND418 | 1981-02-26 | 0.0 | 47.2536 | 97.2037 |
| ND419 | 1981-02-26 | 0.0 | 47.4934 | 97.2015 |
| ND428 | 1981-02-26 | 0.7 | 46.6236 | 97.2293 |
| ND406 | 1981-03-11 | 0.0 | 46.9708 | 97.3914 |
| ND407 | 1981-03-11 | 18.9 | 46.9823 | 97.0587 |
| ND411 | 1981-03-11 | 0.0 | 46.7918 | 97.1263 |
| ND412 | 1981-03-11 | 0.0 | 46.7032 | 97.0771 |
| ND413 | 1981-03-11 | 0.0 | 46.5271 | 96.9118 |
| ND428 | 1981-03-11 | 1.1 | 46.6236 | 97.2293 |
| MN110 | 1981-03-12 | 0.3 | 46.8199 | 96.4949 |
| MN111 | 1981-03-12 | 0.1 | 46.5286 | 96.4849 |
| MN112 | 1981-03-12 | 0.6 | 46.3620 | 96.5503 |
| MN113 | 1981-03-12 | 0.1 | 46.1138 | 96.4828 |
| MN120 | 1981-03-12 | 0.6 | 47.4203 | 96.2889 |
| MN121 | 1981-03-12 | 0.0 | 47.5227 | 96.6729 |
| MN122 | 1981-03-12 | 0.0 | 47.3018 | 96.6768 |
| ND104 | 1981-03-12 | 18.6 | 48.8899 | 102.6671 |
| ND105 | 1981-03-12 | 19.8 | 48.9133 | 102.2444 |
| ND106 | 1981-03-12 | 0.7 | 48.8899 | 102.3937 |
| ND107 | 1981-03-12 | 0.3 | 48.6865 | 102.2200 |
| ND109 | 1981-03-12 | 31.4 | 48.8580 | 101.6367 |
| ND115 | 1981-03-12 | 25.4 | 48.6291 | 101.4850 |
| ND120 | 1981-03-12 | 0.0 | 48.4022 | 101.8175 |
| ND125 | 1981-03-12 | 0.0 | 48.7691 | 101.9123 |
| ND129 | 1981-03-12 | 0.0 | 48.2766 | 101.4543 |
| ND130 | 1981-03-12 | 0.3 | 48.3069 | 101.6110 |
| ND229 | 1981-03-12 | 0.0 | 47.6004 | 97.4445 |
| ND236 | 1981-03-12 | 24.6 | 47.5216 | 97.8416 |
| ND404 | 1981-03-12 | 0.0 | 47.2396 | 97.6597 |
| ND405 | 1981-03-12 | 0.0 | 47.0179 | 97.5644 |
| ND414 | 1981-03-12 | 0.4 | 46.3403 | 97.2098 |
| ND415 | 1981-03-12 | 0.0 | 46.2551 | 96.9724 |
| ND416 | 1981-03-12 | 0.0 | 46.7592 | 97.5769 |
| ND417 | 1981-03-12 | 0.3 | 46.4494 | 97.3967 |
| ND418 | 1981-03-12 | 0.0 | 47.2536 | 97.2037 |
| ND419 | 1981-03-12 | 0.0 | 47.4934 | 97.2015 |
| ND420 | 1981-03-12 | 0.0 | 47.2101 | 97.4144 |
| ND113 | 1981-03-13 | 1.2 | 48.6752 | 100.9575 |
| ND114 | 1981-03-13 | 0.4 | 48.7581 | 101.3966 |
| ND116 | 1981-03-13 | 34.0 | 48.8004 | 100.1925 |
| ND117 | 1981-03-13 | 0.8 | 48.8153 | 100.5712 |
| ND118 | 1981-03-13 | 28.1 | 48.0100 | 100.8343 |
| ND119 | 1981-03-13 | 28.4 | 48.0852 | 100.5925 |
| ND121 | 1981-03-13 | 1.1 | 48.4913 | 101.1693 |
| ND122 | 1981-03-13 | 0.2 | 48.8364 | 101.2883 |
| ND222 | 1981-03-13 | 44.7 | 47.6967 | 99.9098 |
| ND237 | 1981-03-13 | 42.3 | 47.8109 | 99.5011 |
| ND401 | 1981-03-13 | 32.6 | 47.4696 | 99.5218 |
| SK301 | 1981-03-13 | 30.8 | 49.0902 | 102.0344 |
| SK302 | 1981-03-13 | 27.5 | 49.1725 | 102.5776 |
| SK303 | 1981-03-13 | 26.8 | 49.2256 | 103.1456 |
| SK304 | 1981-03-13 | 24.1 | 49.1020 | 103.5034 |
| SK305 | 1981-03-13 | 16.2 | 49.4574 | 103.8789 |
| SK306 | 1981-03-13 | 21.8 | 49.5299 | 103.6228 |
| SK307 | 1981-03-13 | 26.4 | 49.7406 | 103.0168 |
| SK308 | 1981-03-13 | 28.4 | 49.5329 | 102.2495 |
| SK309 | 1981-03-13 | 18.4 | 49.4610 | 104.4371 |
| SK310 | 1981-03-13 | 14.5 | 49.7609 | 104.0585 |
| SK311 | 1981-03-13 | 26.6 | 50.0142 | 103.1457 |
| SK312 | 1981-03-13 | 19.0 | 49.5135 | 104.1341 |
| SK313 | 1981-03-13 | 23.3 | 49.1537 | 103.6293 |
| SK314 | 1981-03-13 | 16.4 | 49.9501 | 103.9822 |
| SK315 | 1981-03-13 | 24.3 | 49.2211 | 103.3550 |
| SK316 | 1981-03-13 | 19.6 | 49.4118 | 103.7988 |
| SK317 | 1981-03-13 | 19.3 | 49.3196 | 103.8181 |
| SK318 | 1981-03-13 | 24.7 | 49.4029 | 102.2985 |
| SK319 | 1981-03-13 | 32.6 | 49.3366 | 102.2829 |
| SK320 | 1981-03-13 | 26.9 | 49.6501 | 102.4353 |
| MN101 | 1981-03-14 | 2.7 | 48.7110 | 96.9288 |
| MN102 | 1981-03-14 | 1.4 | 48.5506 | 96.8992 |
| MN103 | 1981-03-14 | 1.3 | 48.3851 | 96.8464 |
| MN104 | 1981-03-14 | 1.3 | 48.2755 | 96.8070 |
| MN105 | 1981-03-14 | 1.7 | 48.1301 | 96.7415 |
| MN106 | 1981-03-14 | 1.5 | 48.0075 | 96.6679 |
| MN107 | 1981-03-14 | 0.0 | 47.6852 | 96.5607 |
| MN108 | 1981-03-14 | 0.0 | 47.4538 | 96.5300 |
| MN109 | 1981-03-14 | 0.0 | 47.1285 | 96.4920 |
| MN115 | 1981-03-14 | 34.2 | 48.5678 | 96.7025 |
| MN116 | 1981-03-14 | 38.3 | 48.6502 | 96.5766 |
| MN117 | 1981-03-14 | 31.7 | 48.4214 | 96.3750 |
| MN118 | 1981-03-14 | 30.7 | 47.8994 | 96.5346 |
| MN119 | 1981-03-14 | 27.6 | 47.8116 | 96.2940 |
| ND201 | 1981-03-14 | 59.4 | 48.3595 | 99.6045 |
| ND202 | 1981-03-14 | 60.5 | 48.6367 | 99.5008 |
| ND203 | 1981-03-14 | 52.2 | 48.1068 | 99.4290 |
| ND204 | 1981-03-14 | 53.4 | 48.2210 | 99.0753 |
| ND205 | 1981-03-14 | 56.8 | 48.4921 | 99.1191 |
| ND206 | 1981-03-14 | 40.2 | 48.9052 | 98.9472 |
| ND207 | 1981-03-14 | 41.8 | 48.8871 | 98.3592 |
| ND208 | 1981-03-14 | 42.6 | 48.7552 | 98.6521 |
| ND209 | 1981-03-14 | 57.1 | 48.7544 | 98.2479 |
| ND210 | 1981-03-14 | 53.2 | 48.6952 | 98.1365 |
| ND211 | 1981-03-14 | 47.8 | 48.5834 | 98.3744 |
| ND212 | 1981-03-14 | 50.6 | 48.4501 | 98.5041 |
| ND213 | 1981-03-14 | 43.7 | 48.1863 | 98.3670 |
| ND214 | 1981-03-14 | 2.4 | 48.7990 | 97.5241 |
| ND215 | 1981-03-14 | 1.7 | 48.7982 | 97.3413 |
| ND216 | 1981-03-14 | 1.0 | 48.7170 | 97.4349 |
| ND217 | 1981-03-14 | 1.1 | 48.5154 | 97.4553 |
| ND218 | 1981-03-14 | 2.3 | 48.3107 | 97.4440 |
| ND219 | 1981-03-14 | 1.5 | 48.1470 | 97.4598 |
| ND220 | 1981-03-14 | 29.6 | 48.3134 | 97.6290 |
| ND221 | 1981-03-14 | 39.8 | 48.6085 | 97.7425 |
| ND226 | 1981-03-14 | 25.2 | 47.8764 | 97.9781 |
| ND227 | 1981-03-14 | 27.7 | 47.7522 | 97.7950 |
| ND230 | 1981-03-14 | 57.7 | 48.6977 | 99.1909 |
| ND231 | 1981-03-14 | 53.2 | 48.3974 | 98.8933 |
| ND232 | 1981-03-14 | 36.6 | 48.9283 | 97.5182 |
| ND233 | 1981-03-14 | 41.5 | 48.8663 | 97.7651 |
| ND234 | 1981-03-14 | 34.5 | 48.3146 | 97.8528 |
| ND235 | 1981-03-14 | 0.0 | 47.7810 | 97.2065 |
| ND238 | 1981-03-14 | 28.0 | 47.8541 | 97.2000 |
| MN223 | 1981-03-16 | 0.0 | 48.5140 | 95.7723 |
| MN224 | 1981-03-16 | 1.9 | 48.4799 | 95.6772 |
| MN225 | 1981-03-16 | 0.0 | 48.4437 | 95.8818 |
| MN227 | 1981-03-16 | 0.0 | 48.3305 | 95.7560 |
| MN228 | 1981-03-16 | 0.0 | 48.2995 | 95.6898 |
| MN229 | 1981-03-16 | 0.0 | 48.2597 | 95.6187 |
| MN231 | 1981-03-16 | 0.0 | 48.0632 | 95.6396 |
| MN232 | 1981-03-16 | 1.6 | 47.9655 | 95.6179 |
| MN233 | 1981-03-16 | 0.0 | 47.8579 | 95.6321 |
| MN235 | 1981-03-16 | 0.0 | 47.7494 | 95.5673 |
| MN236 | 1981-03-16 | 0.0 | 47.5622 | 95.1337 |
| MN237 | 1981-03-16 | 1.6 | 47.5885 | 95.2756 |
| MN238 | 1981-03-16 | 0.4 | 47.4924 | 95.3725 |
| MN243 | 1981-03-16 | 1.1 | 46.8468 | 95.6348 |
| MN246 | 1981-03-16 | 0.0 | 46.7557 | 95.5075 |
| IA102 | 1981-03-17 | 17.7 | 43.3597 | 96.1857 |
| MN114 | 1981-03-17 | 21.1 | 45.9210 | 96.4817 |
| MN301 | 1981-03-17 | 17.4 | 45.6880 | 96.4165 |
| MN305 | 1981-03-17 | 20.1 | 45.0666 | 96.2585 |
| MN306 | 1981-03-17 | 19.6 | 44.8632 | 96.2033 |
| MN308 | 1981-03-17 | 24.5 | 44.5848 | 96.2830 |
| MN309 | 1981-03-17 | 21.6 | 44.3662 | 96.2927 |
| MN310 | 1981-03-17 | 22.8 | 44.1119 | 96.3176 |
| MN312 | 1981-03-17 | 16.2 | 44.0444 | 95.2009 |
| MN313 | 1981-03-17 | 19.6 | 44.0439 | 94.9741 |
| MN315 | 1981-03-17 | 22.2 | 43.5585 | 96.2209 |
| MN317 | 1981-03-17 | 24.1 | 43.8982 | 94.3479 |
| MN318 | 1981-03-17 | 20.5 | 43.9159 | 94.0400 |
| MN319 | 1981-03-17 | 16.4 | 43.9875 | 95.8614 |
| MN320 | 1981-03-17 | 20.7 | 43.8837 | 96.2029 |
| MN321 | 1981-03-17 | 18.4 | 44.0439 | 94.7336 |
| MN322 | 1981-03-17 | 0.0 | 44.2639 | 94.2416 |
| MN401 | 1981-03-17 | 29.1 | 44.0590 | 92.9813 |
| MN402 | 1981-03-17 | 20.8 | 43.8971 | 93.7646 |
| MN403 | 1981-03-17 | 27.5 | 43.8824 | 93.0578 |
| MN404 | 1981-03-17 | 30.7 | 43.8977 | 92.7457 |
| MN405 | 1981-03-17 | 27.2 | 43.8980 | 93.4930 |
| SD205 | 1981-03-17 | 21.0 | 44.8829 | 96.8957 |
| SD206 | 1981-03-17 | 18.4 | 44.7395 | 96.8155 |
| SD209 | 1981-03-17 | 22.6 | 45.7549 | 97.0277 |
| SD210 | 1981-03-17 | 20.5 | 45.3298 | 96.8533 |
| SD401 | 1981-03-17 | 15.8 | 44.3751 | 97.8522 |
| SD402 | 1981-03-17 | 20.2 | 44.2763 | 96.6241 |
| SD412 | 1981-03-17 | 27.3 | 43.9701 | 96.8574 |
| SD413 | 1981-03-17 | 27.0 | 43.7946 | 96.9993 |
| SD415 | 1981-03-17 | 20.9 | 43.7067 | 96.6110 |
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