Doppler radar quick-looks from 4 AM P-3 flight into Tropical Storm Leslie, 8 September 2012

As Tropical Storm Leslie slowly moved north toward Bermuda NOAA P-3 missions collected airborne Doppler radar data to use in initializing and evaluating model guidance. Included here you see images of the horizontal winds within the inner core of Leslie sampled from the tail Doppler radar on the P-3 early on 8 September 2012. These images are at three altitudes, 1 km, 3 km, and 6 km, using a composite of winds from two legs from the P-3 oriented northwest-southeast and northeast-southwest. Also plotted on the 1-km altitude analysis are the locations of dropsondes deployed by the P-3 (plotted using standard station symbols). These analyses show that Leslie has a clear circulation center at all altitudes shown, which is more symmetric than the earlier analyses, but still has stronger winds north and east of the circulation center. The circulation center is only slightly tilted from south to north with increasing altitude from 1-km altitude to 6-km. The distribution of precipitation is also more symmetric at all altitudes shown. The increased symmetry in the winds and precipitation suggests that the shear decreased surrounding Leslie. Unlike in the earlier analysis, there is no apparent double wind maxima, with only the outer one remaining near 80 nm from the center, suggesting that the inner wind maximum has been replaced by the larger wind maximum.

All the Leslie radar composites at 0.5-km height resolution are available at http://www.aoml.noaa.gov/hrd/Storm_pages/leslie2012/radar.html.