I wanted to plot streamlines with NOAA composite (2.5*2.5 lon/lat) from 30 west to 10 east ( I definitely want the map to be from west to east(. I tried to draw it with basemap (The codes are attached). But the stream lines are not plotted in the western longitudes. I would be very grateful if someone could help me solve this problem. My codes attempting to solve the problem:
from netCDF4 import Dataset as NetCDFFile
import matplotlib.pyplot as plt
from matplotlib.ticker import MultipleLocator
from matplotlib.patches import Rectangle
from matplotlib.patches import Polygon
import numpy as np
from mpl_toolkits.basemap import Basemap
fig = plt.figure(figsize=(18,15))
ax = fig.add_subplot(111)
nc1 = NetCDFFile('E:/cycle-of-Mjo/NOAA/nc/u850b1.nc')
nc2 = NetCDFFile('E:/cycle-of-Mjo/NOAA/nc/v850b1.nc')
lat = nc1.variables\['lat'\]\[:\]
lon = nc1.variables\['lon'\]\[:\]
U= nc1.variables\['uwnd'\]\[:\]
V= nc2.variables\['vwnd'\]\[:\]
map = Basemap(projection='cyl',llcrnrlon=-40.,llcrnrlat=-30.,urcrnrlon=150.,urcrnrlat=61.,resolution='i' ,suppress_ticks=False)
lat_ticks=np.arange(np.ceil(-30.0),int(61.0),20)
lon_ticks=np.arange(np.ceil(-40.0),int(150.0),30)
lon_ticks_proj, \_=map(lon_ticks, np.zeros(len(lon_ticks)))
\_, lat_ticks_proj=map(np.zeros(len(lat_ticks)), lat_ticks)
ax.set_xticks(lon_ticks_proj)
ax.set_yticks(lat_ticks_proj)
plt.tick_params(labelleft=False, labelbottom=False , axis='both',which='major')
map.drawcoastlines()
map.drawcounties()
parallels = np.arange(-30.,61.,20.)
meridians = np.arange(-40,150.,30.)
map.drawparallels(lat_ticks,labels=\[1,0,0,0\],fontsize=12 , dashes=(0,1), fontweight='bold')
map.drawmeridians(lon_ticks,labels=\[0,0,0,1\],fontsize=12 , dashes=(0,1), fontweight='bold')
lons,lats= np.meshgrid(lon,lat)
x,y = map(lons,lats)
Q = plt.streamplot(lon\[::5\],lat\[::-5\],U\[0,::-5,::5\],V\[0,::-5,::5\],linewidth=1, density=2 ,arrowstyle='-\>', arrowsize=2, color='k',minlength=0.05)
