Content-Length: 11599 | pFad | http://wwwagwx.ca.uky.edu/snow_decision_checklist.htm
ITEM #1 | ITEM #2 | ITEM #3 | ITEM #4 |
---|---|---|---|
Surface Temp | Surface Dewpoint | 850mb Temp | Freezing Level |
<2.2 C (36F) | <3C (37) | < 0C (32F) | < 1200 + or - 300 |
Yes / No | Yes / No | Yes / No | Yes / No |
PARAMETERS | RAIN | MIXED | SNOW |
---|---|---|---|
Surface Temp | > 37F | 33F-36F | <33F |
Surface Dewpoint | >38F | 27F-37F | <27F |
850mb Temp | >0C | -2C-0C | <-2C |
850mb Dewpoint Dep | **** | **** | -5C-0C |
700mb Temp | -6C | **** | <-5C |
700mb Dewpoint Dep | **** | **** | >-11C |
500mb Temp N of 40'N | **** | **** | <-29C |
S of 40' N | **** | **** | <-19C |
1000-850mb | >1325m | 1300-1325m | <1300m |
1000-700mb | >2870 | 2800-2870m | <2800m |
1000-500mb | >5490m | 5360-5490m | <5360m |
850-700mb | >1555m | 1520-1555m | <1520m |
ITEM #1 | ITEM #2 | ITEM #3 | ITEM #4 | ITEM #5 |
Surface Temp | Surface Temp/TD Spread | Surface to <1200m Layer | 1200m to >1600m Layer | 1200 to <1600m Layer |
< 1C | < 8C | >1C | -1C | -1C |
Yes / No | Yes / No | Yes / No | Yes / No | Yes / No |
PARAMETER | IDEAL RANGE | EXTREME RANGE |
Surface Temp | 0C to -4C | 1C to -11C |
Surface Dewpoint | 0C to -5C | 0C to -13C |
Surface Temp/TD | < 4C | <8C |
850mb Temp/TD | < 2C | < 7C |
850mb Temp | +1C to +6C | -8C to +15C |
1000-850mb | **** | 1300 to 1325m |
1000-500mb | 5330 to 5440m | 5320 to 5520m |
850-700mb Wind Direction | **** | 1540 to 1555m |
If most parameters are in the ideal range, expect heavier amounts of freezing precipitation. If most parameters are
in the extreme range, use the graph to determine the most likely precipitation.pFad - (p)hone/(F)rame/(a)nonymizer/(d)eclutterfier! Saves Data!
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