posted Wed Sep 16 08:24:37 1998 PDT
| Date of Mission: | 02 September, 1998 |
| Daily Mission Scientist: | Ed Zipser |
| Deputy Daily Mission Scientist: | Gerry Heymsfield |
| DC-8 Scientist: | Ed Zipser |
| S-POL Scientist: | Gerry Heymsfield |
| Project Scientist: | Robbie Hood |
| UND Citation II Scientist: | Jeff Stith |
| Water Vapor Scientist: | Harvey Melfi |
| Nowcasters: | Ed Bensman Jeff Halverson |
| ER2 Tail Number: | NASA 806 |
| Sortie: | 98-114 |
| Pilot: | Jan Nystrom |
| Take Off: | 2200 UTC (98/09/02) |
| Landing: | 0105 UTC (98/09/03) |
| Duration: | 3.08 hrs |
| DC8 Tail Number: | NASA 817 |
| Sortie: | 980414 |
| CAMEX-3 Flight Number: | 98-03 |
| Pilot: | Frank Batease Ed Lewis |
| Mission Manager: | Chris Miller |
| Navigator: | Russ Padula |
| Take Off: | 1800 UTC (98/09/02) |
| Landing: | 2344 UTC (98/09/02) |
| Duration: | 4.73 hrs |
Hurricane Earl was positioned SW of Destin, Florida at takeoff time.
The planned flights legs were to focus on light to moderate stratiform
precipitation near and to the south of Apalachee Bay in the Gulf of Mexico.
However, after the DC-8 arrived on station it was determined that most
of the rain there was < 35 dBZ and a new flight leg was located 85 miles
to the west of the original leg extending south from a point south of
Panama City Florida for approx. 100 miles over the Gulf of Mexico. This
line as indicated by the Tallahassee 88D was near 50 dBZ on the northern
point and more than 35 dBZ elsewhere. This line was selected after
consultation with the DC-8 mission scientist in an effort to have the UND
Citation below the DC-8 for cloud physics research. In other words, a line
farther to the Northwest might have been a better overall selection but would
have been too far away for the Citation. Lastly, a dry slot developed in
the middle portion of this leg shortly after arrival on station and after a
couple of hours a final leg was postioned along the original line but
displaced 50 miles northward to maximize the amount of moderate straitiform
rain for the rest of e mission. This line was about 50% over land and 50%
over water. The downward spiral location was located near the southern end
f this line in a region of nearly stationary moderate straiform rain
(but also, unforunately, near some convective cells to the north).
Note: Three mobile soundings were launched during the mission by the UCF
sounding team. These points were selected by the forecaster to outline
a region of confluence.
| UND Tail Number: | UND N77ND |
| Pilot: | Kent Streibel |
| Take Off: | 1844 UTC (98/09/02) |
| Landing: | 2130 UTC (98/09/02) |
| Duration: | 2.77 hrs |
First flight. Flew out over Gulf of Mexico for hurricane Earl. Did spiral up at midpoint of line 1 from 12,000 to 20,000 Then did leg at 20,000 to north, then back to midpoint at 16,000. Moved to line 2, which was mostly clear. Penetrated convection at 3 levels on north nd point. Encountered occasional severe turbulence - too intense to work further. HVPS probe op all flight.)
| UND Tail Number: | UND N77ND |
| Pilot: | Kent Streibel |
| Take Off: | 2228 UTC (98/09/02) |
| Landing: | 0046 UTC (98/09/03) |
| Duration: | 2.30 hrs |
Second flight. Flew on west (back) side of decaying thunderstorm, with occasional htning. This was an S-POL mission. Flew legs at (approx.) 26,000 (-18), 22,000 (-10), 16,000 (-1), 15,000 (0), and 11,000 feet. Should be good SPOL case, although HVPS was inop.
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