Update on 10/27/11 — Arlington OEM advises that the outdoor warning testing may take place a bit later than 10:00 a.m.
Arlington County will be testing its outdoor warning system at 10:00 tomorrow morning, according to the Arlington Office of Emergency Management.
The warning system — those sirens you might hear once in a while — was last tested in May.
It’s unclear if tomorrow’s test will be county-wide or concentrated in a specific area.