﻿0. 
  L. 
  Fassig 
  — 
  March 
  Weathe?' 
  in 
  the 
  United 
  States. 
  331 
  

  

  peratures 
  decidedly 
  below 
  the 
  normal 
  in 
  the 
  Middle 
  Atlantic 
  

   States. 
  

  

  March^ 
  1883^ 
  Plate 
  YII. 
  — 
  An 
  examination 
  of 
  the 
  chart 
  

   will 
  show 
  a 
  large 
  area, 
  everywhere 
  east 
  of 
  the 
  105th 
  meridian, 
  

   in 
  which 
  the 
  temperatures 
  were 
  below 
  the 
  average. 
  The 
  

   departures 
  were 
  not 
  large 
  but 
  were 
  uniformly 
  below 
  the 
  

   normal 
  east 
  of 
  this 
  meridian, 
  and 
  as 
  uniformly 
  above 
  normal 
  

   from 
  this 
  meridian 
  to 
  the 
  Pacific 
  coast. 
  The 
  striking 
  feature 
  

   of 
  the 
  pressure 
  distribution 
  was 
  the 
  strength 
  of 
  the 
  continental 
  

   high 
  area, 
  together 
  with 
  the 
  lack 
  of 
  development 
  of 
  the 
  

   Atlantic 
  high 
  area 
  in 
  the 
  western 
  portion 
  of 
  the 
  ocean. 
  Such 
  

   a 
  system 
  brings 
  prevailing 
  northerly 
  or 
  northwesterly 
  winds 
  to 
  

   all 
  sections 
  in 
  the 
  eastern 
  half 
  of 
  the 
  country. 
  The 
  mild 
  

   weather 
  resulting 
  from 
  high 
  pressure 
  over 
  the 
  western 
  Atlantic 
  

   Ocean 
  was 
  absent. 
  The 
  cold 
  and 
  dry 
  northwesterly 
  winds 
  

   meet 
  with 
  comparatively 
  little 
  opposition 
  in 
  their 
  passage 
  across 
  

   the 
  country, 
  such 
  as 
  they 
  meet 
  with 
  when 
  the 
  Atlantic 
  high 
  is 
  

   well 
  marked 
  ; 
  there 
  is 
  a 
  deficiency 
  of 
  rainfall, 
  as 
  is 
  distinctly 
  

   shown 
  by 
  the 
  figures. 
  

  

  March, 
  1885, 
  fig. 
  4. 
  — 
  In 
  March, 
  1885, 
  the 
  line 
  of 
  

   temperature 
  departure 
  was 
  again 
  in 
  the 
  region 
  of 
  the 
  100th 
  

   meridian, 
  with 
  decided 
  minus 
  departures 
  eastward 
  to 
  the 
  

   Atlantic 
  Ocean 
  and 
  plus 
  departures 
  westward 
  to 
  the 
  Pacific 
  

   Ocean. 
  The 
  continental 
  high 
  area 
  covers 
  the 
  entire 
  country, 
  

   with 
  its 
  greatest 
  development 
  over 
  the 
  northern 
  plateau 
  region, 
  

   considerably 
  to 
  the 
  south 
  of 
  its 
  usual 
  position. 
  Here 
  again 
  the 
  

   Atlantic 
  high 
  falls 
  short 
  of 
  extending 
  its 
  influence 
  to 
  our 
  

   coasts 
  ; 
  while 
  well 
  developed 
  it 
  is 
  found 
  farther 
  eastward 
  with 
  

   its 
  axis 
  inclined 
  from 
  southwest 
  to 
  northeast. 
  The 
  continental 
  

   high 
  again 
  plainly 
  dominates 
  the 
  weather 
  of 
  the 
  United 
  States. 
  

   The 
  fact 
  that 
  the 
  center 
  of 
  the 
  continental 
  high 
  area 
  is 
  so 
  

   much 
  farther 
  to 
  the 
  south 
  of 
  its 
  usual 
  position 
  is 
  sufficient 
  

   explanation 
  to 
  account 
  for 
  the 
  temperatures 
  above 
  normal 
  west 
  

   of 
  the 
  100th 
  meridian. 
  With 
  this 
  position 
  of 
  the 
  center 
  the 
  

   bodily 
  transfer 
  of 
  cold 
  air 
  from 
  the 
  neighborhood 
  of 
  Hudson's 
  

   Bay 
  does 
  not 
  take 
  place, 
  and 
  hence 
  there 
  would 
  not 
  be 
  the 
  

   usual 
  frequency 
  of 
  cold 
  northerly 
  winds. 
  

  

  March, 
  1888. 
  — 
  During 
  this 
  month 
  temperatures 
  were 
  below 
  

   normal 
  throughout 
  the 
  tJnited 
  States 
  and 
  the 
  Canadian 
  prov- 
  

   inces. 
  In 
  Manitoba 
  the 
  departure 
  was 
  minus 
  ten 
  degrees. 
  

   From 
  this 
  point 
  the 
  departures 
  diminished 
  in 
  all 
  directions 
  to 
  

   the 
  east, 
  south, 
  and 
  west. 
  In 
  the 
  Middle 
  Atlantic 
  States 
  they 
  

   were 
  from 
  3° 
  to 
  1:° 
  below 
  ; 
  on 
  the 
  Pacific 
  coast, 
  temperatures 
  

   were 
  nearly 
  normal. 
  An 
  area 
  of 
  high 
  pressure 
  of 
  unusual 
  in- 
  

   tensity 
  covered 
  the 
  greater 
  part 
  of 
  British 
  Korth 
  America, 
  the 
  

   pressure 
  over 
  a 
  large 
  portion 
  of 
  this 
  area 
  reaching 
  30*3 
  inches. 
  

   Over 
  the 
  Atlantic 
  Ocean 
  the 
  high 
  area 
  is 
  normally 
  developed 
  

  

  