﻿330 
  0. 
  L. 
  Fassig 
  — 
  March 
  Weather 
  in 
  the 
  United 
  States. 
  

  

  tation 
  was 
  deficient 
  east 
  of 
  the 
  Mississippi 
  River 
  and 
  south 
  of 
  

   the 
  Lakes. 
  

  

  March, 
  1882, 
  fig, 
  3. 
  — 
  During 
  this 
  month 
  the 
  temperatures 
  

   were 
  from 
  2° 
  to 
  4° 
  above 
  normal 
  in 
  nearly 
  all 
  sections 
  

   east 
  of 
  the 
  Mississippi 
  River; 
  to 
  the 
  west 
  and 
  northwest 
  they 
  

   were 
  from 
  4° 
  to 
  8° 
  above. 
  The 
  pressure 
  distribution 
  was 
  

   totally 
  different 
  from 
  that 
  of 
  March, 
  1878, 
  but 
  the 
  eastern 
  

   half 
  of 
  the 
  country 
  was 
  again 
  plainly 
  under 
  the 
  influence 
  of 
  

   the 
  Atlantic 
  high 
  area 
  ; 
  this 
  was 
  not 
  only 
  unusually 
  strong 
  

   but 
  extended 
  inland 
  far 
  beyond 
  the 
  average 
  limits. 
  All 
  the 
  

   characteristics 
  of 
  high 
  area 
  weather 
  prevailed 
  in 
  the 
  eastern 
  

   and 
  southern 
  states 
  during 
  the 
  month 
  ; 
  high 
  temperatures, 
  

   light 
  winds, 
  and 
  comparatively 
  dry 
  weather. 
  The 
  northern 
  

   high 
  area 
  was 
  well 
  developed 
  but 
  the 
  center 
  was 
  farther 
  to 
  the 
  

   north 
  and 
  east 
  than 
  usual, 
  and 
  not 
  in 
  a 
  position 
  to 
  throw 
  de- 
  

   tached 
  masses 
  of 
  cold 
  air 
  into 
  the 
  United 
  States. 
  Without 
  

   observations 
  to 
  fix 
  the 
  position 
  of 
  the 
  Pacific 
  high, 
  it 
  is 
  

   difficult 
  to 
  discuss 
  intelligently 
  the 
  control 
  of 
  weather 
  on 
  the 
  

   Pacific 
  coast. 
  

  

  March, 
  189Jf.. 
  — 
  The 
  temperatures 
  ranged 
  from 
  normal 
  along 
  

   the 
  105° 
  meridian 
  to 
  9° 
  above 
  in 
  the 
  Lake 
  regions 
  and 
  to 
  3° 
  

   below 
  westward 
  to 
  the 
  Pacific 
  coast, 
  ag^ain 
  showino^ 
  a 
  decided 
  

   control 
  of 
  the 
  country 
  east 
  of 
  the 
  Mississippi 
  by 
  the 
  Atlantic 
  

   high 
  area. 
  The 
  rainfall 
  was 
  deficient 
  almost 
  throughout 
  the 
  

   area 
  enclosed 
  by 
  the 
  isobar 
  of 
  30' 
  1 
  inches. 
  

  

  It 
  is 
  clearly 
  apparent 
  from 
  a 
  study 
  of 
  the 
  foregoing 
  analysis 
  

   that 
  in 
  each 
  case 
  the 
  eastern 
  half 
  of 
  the 
  country 
  was 
  under 
  the 
  

   domination 
  of 
  an 
  extension 
  of 
  the 
  Atlantic 
  area 
  of 
  high 
  pres- 
  

   sure, 
  which 
  gave 
  to 
  this 
  region 
  either 
  prevailing 
  southerly 
  or 
  

   easterly 
  winds 
  from 
  a 
  warmer 
  region, 
  or 
  prevailing 
  light, 
  vari- 
  

   able 
  winds. 
  It 
  will 
  also 
  be 
  noted 
  that 
  when 
  a 
  region 
  is 
  clearly 
  

   within 
  this 
  high 
  area, 
  generally 
  within 
  the 
  isobar 
  of 
  30-1 
  

   inches, 
  there 
  is 
  a 
  deficiency 
  of 
  rain, 
  even 
  when 
  easterly 
  winds 
  

   are 
  indicated 
  by 
  the 
  arrangement 
  of 
  the 
  isobars. 
  

  

  We 
  see 
  that 
  the 
  Middle 
  Atlantic 
  States 
  and 
  neighboring 
  

   regions 
  may 
  be 
  warmed 
  owing 
  to 
  an 
  unusual 
  extension 
  west- 
  

   ward, 
  or 
  increased 
  intensity 
  of 
  the 
  Atlantic 
  high 
  area, 
  as 
  in 
  

   1882, 
  1894, 
  and 
  1898 
  ; 
  or 
  it 
  may 
  be 
  owing 
  to 
  the 
  retreat 
  north- 
  

   ward 
  of 
  the 
  British 
  American 
  high 
  area, 
  as 
  in 
  1878. 
  In 
  

   either 
  case 
  there 
  is 
  a 
  comparative 
  absence 
  of 
  the 
  cold 
  north- 
  

   westerly 
  winds 
  which 
  are 
  a 
  characteristic 
  feature 
  of 
  the 
  normal 
  

   March, 
  in 
  which 
  there 
  is 
  more 
  or 
  less 
  of 
  a 
  see-saw 
  betsveen 
  the 
  

   domination 
  of 
  winds 
  from 
  the 
  northwest 
  and 
  those 
  from 
  tlie 
  

   southeast. 
  All 
  warm 
  Marches 
  fall 
  into 
  one 
  or 
  the 
  other 
  of 
  

   these 
  two 
  classes. 
  

  

  Cold 
  Marches. 
  — 
  We 
  come 
  now 
  to 
  the 
  consideration 
  of 
  

   another 
  class 
  of 
  March 
  conditions, 
  those 
  having 
  mean 
  tem- 
  

  

  