Major dust storm - It started off innocent but by noon we're seen winds pick up. Now in the afternoon we're in a major dust storm today along the border. So far NM Hwy 11 and 180 are closed going out of Deming. I-10 is still open but warnings are in place for low visibility in spots. Below is an image I took at 1:46 pm at corner of University and El Paseo. Visibility was estimated at 0.3 miles based on landmarks.
I was at the core site trailer earlier today and the PM10 BAM had stopped due to low flow rate. I changed the PM10 BAM max range from 1 mg/m3 to 10 mg/m3 hoping to see the maximum concentrations but it might even exceed 10 mg/m3 today. At the time, the hourly PM2.5 BAM was reading 521 µg/m3.
By late afternoon, the flow rate on the PM10 BAM didn't go up until the concentration went down below 1000 ug/m3. The PQ100 was flowing but unfortunately the Minivol didn't run. Below is the filter from the FRM PQ100 sampler. Before exposure the Teflon filters are white.
Below is a chart showing hourly PM10 collected at the NMED stations from today. The Las Cruces Holman Road station recorded the highest at 10,155 µg/m3.