Plot the spatial grid on map in matlab

We will need the latgrid and longitude grid with equal size to that of the variable, say newT

figure
 latlim = [37,45 ]; lonlim = [-82 ,-70];
 ax = worldmap(latlim, lonlim);
 states = shaperead('usastatehi','UseGeoCoords', true, 'BoundingBox', [lonlim', latlim']);
geoshow(ax, states, 'Facecolor', [1 1 0.9]);
 surfacem(latgrid,longrid,newT);