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October 2014 Weather in Review

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October 2014 Weather in Review Friday Weather Discussion 31 October 2014 Classic stationary/warm frontal setup: ascent along stalled-out boundary, with an added kick ... – PowerPoint PPT presentation

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Title: October 2014 Weather in Review


1
October 2014 Weather in Review
  • Friday Weather Discussion
  • 31 October 2014

2
Global View
Left 1-27 October mean 500 hPa geopotential
height (m) Right Departure of 1-27 October mean
from 1980-2010 climatology Data obtained from
NOAA/ESRL/PSD, derived from NCEP-NCAR Reanalysis
3
Global View
Left 1-27 October mean 850 hPa temperature
(K) Right Departure of 1-27 October mean from
1980-2010 climatology Data obtained from
NOAA/ESRL/PSD, derived from NCEP-NCAR Reanalysis
4
Up North
Left Arctic sea ice extent, 1 July to 29
October Right Northern Hemisphere snow and ice
cover as of 29 October Sources Natl. Snow and
Ice Data Center (left), National Ice Center
(right)
5
Regional View
Left Average 2-m temperature (F), 1-29
October Right Departure of avg. 2-m temperature
from 1981-2010 mean Data obtained from
Midwestern Regional Climate Center.
6
Regional View
Left Accumulated precipitation (in), 1-29
October Right Percent of 1981-2010 mean for 1-29
October accum. precip. Data obtained from
Midwestern Regional Climate Center.
7
Local View
High
Low
Departure from normal
Data obtained from the National Weather Service.
8
Outline
  • Midwestern US precipitation episodes
  • October 1-2, 9-10, 13
  • Amplified pattern across Eurasia
  • Notable tropical cyclone events and their
    possible influences upon the mid-latitudes

9
Midwestern US 1-2 October
http//tinyurl.com/octradar1
10
Midwestern US 1-2 October
Valid 0000 UTC 2 October 2014 Source Storm
Prediction Center
Top 500 hPa height (every 6 dam), temperature
(every 2C), and observations Bottom 850 hPa
height (every 3 dam), temperature (every 2C),
dew point temperature (every 1C), and
observations
11
Midwestern US 1-2 October
  •  

12
Midwestern US 9-10 October
http//tinyurl.com/octradar2
13
Midwestern US 9-10 October
Valid 0000 UTC 10 October 2014 Source Storm
Prediction Center
Top 500 hPa height (every 6 dam), temperature
(every 2C), and observations Bottom 850 hPa
height (every 3 dam), temperature (every 2C),
dew point temperature (every 1C), and
observations
14
Midwestern US 9-10 October
 
15
Midwestern US 13 October
http//tinyurl.com/octradar3
16
Midwestern US 13 October
Valid 0000 UTC 14 October 2014 Source Storm
Prediction Center
Top 500 hPa height (every 6 dam), temperature
(every 2C), and observations Bottom 850 hPa
height (every 3 dam), temperature (every 2C),
dew point temperature (every 1C), and
observations
17
Midwestern US 13 October
 
18
Eurasia 1-31 October
  • Early higher latitude blocking, vortex merger
    and subsequent southward displacement
  • Middle ejection, but with reinforcement of
    longwave trough-dominated pattern
  • Late more progressive pattern taking hold

http//www.atmos.albany.edu/student/heathera/dt/nh
em/1_to_15_oct14.html http//www.atmos.albany.edu/
student/heathera/dt/nhem/15_to_31_oct14.html
19
Hurricane Gonzalo
Image obtained from http//weather.unisys.com/hurr
icane/atlantic/2014/.
20
Hurricane Gonzalo
Image obtained from NOAA/Environmental
Visualization Laboratory.
21
Hurricane Gonzalo
Loop credit Brian McNoldy/RSMAS-UMiami. Radar
credit Bermuda Weather Service.
22
Hurricane Gonzalo
Image credit University of Wyoming.
23
Hurricane Gonzalo
 
24
Hurricane Gonzalo
Image credit NASA/TRMM (http//trmm.gsfc.nasa.gov
/publications_dir/regional_africa.html)
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