"Alerts:" showing even if no alerts

[dmd]

Alerts: shows up even if there are no alerts to display:

12:58 <shmup> wx 49686
12:58 <wx> Traverse City, MI 49686, USA: Clear 73°F Winds: 2mph E Clouds: 20% Dewpoint: 65°F Humidity: 76% Pressure: 990mbar Sun: ☀ 06:27:44am ☽ 09:08:31pm 14h40m47s Alerts:
12:59 <dmd> wx
12:59 <wx> Alfred Faure, French Southern and Antarctic Lands: Rain 39°F Wind Chill: 27°F Winds: 31mph WNW Gusts: 37mph Clouds: 88% Dewpoint: 34°F Humidity: 85% Pressure: 976mbar Sun: ☀ 08:54:30am ☽ 06:23:54pm 9h29m24s Alerts:
12:59 <dmd> wx 02476
12:59 <wx> Arlington, MA 02476, USA: Rain 77°F Winds: 11mph SSW Gusts: 25mph Clouds: 63% Dewpoint: 70°F Humidity: 78% Pressure: 1004mbar Sun: ☀ 05:36:54am ☽ 08:04:35pm 14h27m41s Alerts:

pywx/modules/weather.py

Line 493 in 4719953

{% if alerts %}{{ 'Alerts'|tc }}: {% for alert, acolor in alerts %}#{{ loop.index }}: {{ alert.title|c(acolor) }} {% endfor %}{% endif %}"""

seems to have logic to prevent this, but it's not working.