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</head><body><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;">Hi,</p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;">I have a script that loops through a time interval, captures surface level data then steps up through levels 1000 - 500 mb collecting data at each. <br></p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;"><br></p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;">The issue is, when the loop moves to the next time step, how to I reset the level ('set lev XXX') back to the surface?</p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;"><br></p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;">I issue the 'clear' command when wrapping up the time step, but I keep getting undefined results for my surface variables (tmp2m, apcpsfc, csnowsfc) after the first time step, making me think that my 'lev' is still at 500 mb. <br></p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;"><br></p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;">Any ideas?<br></p><p style="font-size: 12pt; font-family: helvetica, arial, sans-serif; color: #333333;"><br></p><div class="io-ox-signature"><div><span style="font-size: small;" size="2">Thanks,<br>Mark</span></div></div></body></html>