Question

Give a range for the 1000-500mb thickness values for this region

992 016 H0O 540 - 2 GFS 50OMB HGTVOR TUE 1 4021 1/ 18OOVOO6 INITIAL TIME = 140 2 1 1 / 1 200F006 INITIAL TIME 140 2 1 1 / 1 200 F006 = 2 6 do 0D 0 315 90 315 20 GFS 6HR PRE INITIAL TIME = 140211/1200F006 GFS 850MB TEMP TUE140211/1800VO06 10

Answer 1

The 1000-500mb thickness method to forecast precipitation type. The 1000-500mb thickness method is a very general method. It can be used to give you an idea of precipitation type over a given area. Using the second figure fro deciphering data, The critical 1000-500mb thickness value that represents the cutoff between liquid versus solid precipitation is 540 line. Other locations across the country could have a slightly different value. For the lines that have numbers lower than 540 should see frozen precipitation while regions that have a thickness higher than 540 should see liquid precipitation. The 540 line shows more or less where there is a 50% chance for rain versus or a 50% chance for frozen precipitation.