A weak, middle and upper-level short wave is moving into Arizona today from the Pacific. There are several bands of very light showers ahead of this feature. The graphic above is TUS NWS radar composite chart for 8:22 am MST this morning - showers are moving generally northward while the bands are inching eastward. Visible satellite image from 8 am below shows that most of Arizona has heavy cloud cover this morning.
Perspective from the water vapor image, at same time above, indicates the upper-tropospheric vorticity center is probably near Yuma this morning. The 12 UTC TUS sounding plot below indicates that cloud bases are very high - near 500 mb (i.e., around 16,000 ft msl) with temperatures at cloud base being around -6 to -10 C. Today's short wave will be followed by another on Sunday and yet another Wednesday - so some cloudy periods and perhaps more light showers off and on for next five days or so.
No comments:
Post a Comment