(Pictured above: Frazil pans flowing by the Highway 2 bridge in the Town of Peace River (km 396) on January 10.)
River Ice Observation Report No. 6
January 11, 2017
Based on a RADARSAT-2 satellite image, the ice front was located at km 443 (47 km downstream of the Town of Peace River) at 7:06 MST on January 11. The ice front advanced steadily last week and through the weekend due to the seasonal and below seasonal temperatures along the Peace River. The rate of ice front advance was approximately 9 km/day between January 7 and January 10. Between the evening of January 10 and the afternoon of January 11, gauge records at Berreth Flats indicate that the ice cover downstream of Berreth Flats experienced a number of consolidations (likely precipitated by an increase in air temperatures on January 10). A satellite image in the morning of January 11 showed that the ice front had retreated by at least 6 km overnight, although the full extent of the consolidations is unknown. Elevated water levels have been reported in the vicinity of the Whitemud River confluence.
Temperatures are forecast to return to seasonal tomorrow, but are expected to warm rapidly over the weekend, reaching daily highs above zero on Sunday. The ice front is expected to slow its advance in the response to the higher temperatures, and may retreat as temperatures exceed freezing. Additional consolidations of the ice cover are likely. These consolidations are expected to be well downstream of the Town of Peace River. The ice front is not expected to reach Peace River in the next week.
The ice front on the Peace River is now approximately a week and a half behind its average location for this time of year.
Alberta Environment and Parks, and BC Hydro are in contact regarding river ice conditions and operation of the BC Hydro Peace River facilities.
- January 7, 2016
o Based on a RADARSAT-2 satellite image, the ice front was located at km 471 at 7:23 MST (75 km downstream of the Town of Peace River).
- January 8, 2017
o A ground observation at km 455 near the confluence of the Whitemud River showed that ice was moving very slowly with 100% surface ice concentration at 14:00 MST. This location is 51 km downstream of the Town of Peace River).
- January 10, 2017
o An aerial observation located the ice front at km 437.3 at 13:55 (41.3 km downstream of the Town of Peace River).
- January 11, 2017
o Based on a RADARSAT-2 satellite image, the ice front was located at km 443 at 7:06 MST (47 km downstream of the Town of Peace River).
The next observation report is expected to be posted on or before January 17th