1 / 10

Met Briefing f or ATTREX Flight 4, Feb 21

Met Briefing f or ATTREX Flight 4, Feb 21. Rennie Selkirk 20 Feb 2013. W eather for flight ops Tomorrow: good; backup Fri/Sat also OK Outlook for next week Conditions in flight region for Thu/Fri 100 hPa temperature field during flight Large-scale EPV pattern WV RDF results

peri
Download Presentation

Met Briefing f or ATTREX Flight 4, Feb 21

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Met Briefing for ATTREX Flight 4, Feb 21 Rennie Selkirk20 Feb 2013 • Weather for flight ops • Tomorrow: good; backup Fri/Sat also OK • Outlook for next week • Conditions in flight region for Thu/Fri • 100 hPa temperature field during flight • Large-scale EPV pattern • WV RDF results • Temperature evolution • Hovmöller plots at 100 hPa and 70 hPa • Pfister plot

  2. 4 AM Thursday – 21 Feb 12UT / NAM 24HR A B DISCUSSION • Overall, looks good for 7 AM takeoff: • Weak surface winds, but increasing to 10 kts from NE by mid-morning • Northwesterly flow aloft • RH @ 700 hPa <30%: stable, descending air; ~40% low cloudiness C

  3. Long range outlook G H TUESDAY, 2/26 • Tuesday looks problematic • Short-wave trough passing through • Likely precipitation Later on…. 500 hPa ridge passage Friday, so positive outlook after Tuesday

  4. 100 hPa Temperatures and winds

  5. 380 K EPV – GEOS-5 Mid-flight 22 Feb 00UT • We will be deep into tropical air from about 12°N southward

  6. RDF Results – 22 Feb Cloud probability or zones of dehydration • Possible thin cirrus along track near 5°N

  7. RDF Results – 22 Feb Net dehydration • South of 10°N, the track traverses region of weak dehydration (0.8 to 1.1 ppmv)

  8. Hovmöller diagram at 0° – 100 hPa T (Very) approx. time-longitude flight window • Eastern Pacific warming up

  9. Hovmöller diagram at 0° – 70hPa T (Very) approx. time-longitude flight window • Traveling wave features more prominent

  10. 100 hPa T and 70following upward trend in 70 hPa T since • Temperatures at both levels still approx. 2 K below 20-year averages

More Related