[PR]:700mb_Omega_<=-3 [PR]:700mb_Omega_<=-6 [PR]:700mb_Omega_<=-9 [MN]:Frontogenesis_900-650mb_layer [MN]:Frontogenesis_and_MPV_850mb [MN]:Frontogenesis_and_MPV_700mb [PR]:Front_900-650mb_layer>=0.1K [PR]:Front_>=0.1_and_MPV_<=0.25_850mb [PR]:Front_>=0.1_and_MPV_<=0.25_700mb [PR]:Front_>=0.1_and_MPV_<=0.25_900-650mb