IOP16 - LOW 39A
15-18 FEB 1997
Humphrey W Lean | | email@example.com
Fast moving, rapidly deepening, secondary wave, FASTEX
type cyclone with emerging cloud head and distinct dry intrusion moves
Aircraft: Upstream: Learjet(Objective), MSA: G-IV (flight level data only),
C-130 (flight no A517),P3
Ships: 3 (2 probably relevant)
Soundings: Upstream North America, Europe coastal
Meteorology of Interest
Rapidly deepening but only because moving close to parent low (throughout
MSA period no 1hPa closed isobars)
Fast moving (29ms-1). Dimensions 1,500Km from imagery
Pronounced dry intrusion in MSA which may have been captured in
FUS by LEAR flight.
Emerging cloud head in MSA period.
Primary cold front changes from rearward to forward sloping in
V strong 900hPa winds (40ms-1).
Low level vorticity strip at early stages.
-ve 300hPa PV anomaly covered by MSA flight tracks.
T+24,48,72 forecasts good.
IR Satellite, PMSL, fronts
700mb Vertical velocity,
PMSL, PV 2 height animation
KEY to animations
Flight log (inc sonde tephigrams)
tables from workshop
Field site info
(flight tracks etc)