iclr forecast webinar: 2014 canadian wildfire season (june 6, 2014)
DESCRIPTION
On June 6, 2014 ICLR held a Webinar providing a forecast of the 2014 Canadian wildfire season. The interactive webinar, lead by Kerry Anderson of the Canadian Forest Service, summarized current fire conditions in Canada and provided a forecast for the 2014 wildfire season. Kerry Anderson is a fire research scientist with the Canadian Forest Service. Dr. Anderson received his B.Sc. in 1985, M.Sc. in 1991 and Ph.D in 2009 at the University of Alberta. His PhD thesis entitled "A Multi-scale Approach to Fire-growth Modelling" examined predicting forest fire growth over a range of scales from hourly to seasonally. His M.Sc. thesis entitled "Models to Predict Lightning Occurrence and Prediction over Albert" examined the ability to forecast lightning using upper air soundings. Dr. Anderson is actively involved in research to predict smoke forecasting, fire weather and fire behaviour. Through this research, Dr. Anderson has and continues to develop models to assist fire management agencies in daily operational planning by predicting the potential impact of fires on the landscape.TRANSCRIPT
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Fire Season Prediction
for Canada, 2014
Kerry Anderson
Canadian Forest Service
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Introduction
The Canadian Forest Service is now presenting
monthly and seasonal forecast maps through the
Canadian Wildland Fire Information System (CWFIS).
These are based on Environment Canada’s monthly
and seasonal forecasts, information contained in the
CWFIS, and advice provided by provincial agencies.
This presentation will summarize the current
conditions in Canada and a forecast for the 2014 fire
season.
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Canadian Wildland Fire
Information System
The Canadian
Wildland Fire
Information System
calculates the fire
weather and fire
behaviour
conditions across
the country.
Maps are displayed
over the Internet.
http://cwfis.cfs.nrcan.gc.ca/
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Methodology
1. Calculate spring start-up conditions based on fall drought
code (DC) values and over-winter precipitation amounts,
2. Calculate average daily weather for weather stations across
country,
3. Incorporate Environment Canada’s seasonal predictions,
4. Determine the fire severity based on the ratio of forecasted
over average monthly severity rating (MSR).
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Methodology 1. Fall conditions to Spring startup 2. Calculate average daily weather
4. Calculate fire weather anomaly 3. Apply seasonal predictions
0 50 100 150
05
10
15
20
25
30
CYEG
Days from Apr 1
Te
mp
- c
m3
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Ensemble Forecasts
The Canadian Meteorological Centre (CMC) of Environment
Canada has been providing temperature and precipitation
probabilistic forecasts based on an ensemble of ten
integrations of two climate models developed by Canadian
Center for Climate modeling and analysis (CCCma)
1. CANCM3 (which uses the atmospheric model CANAM3 (also known as
model AGCM3))
2. CANCM4 (which uses the atmospheric model CANAM4 (also known as
model AGCM4))
Forecasts are provided for the next twelve months. 6
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Ensemble Forecasts
Predicted temperatures and precipitation amounts
are entered into the Canadian FWI system.
Temperature Precipitation 7
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Ensemble Forecasts
The ensemble approach
provides a measure of
confidence indicated by
the spread of the
ensemble members.
June
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2013 Fire Season
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2013 Prediction The 2013 fire season was a relatively normal year with below-average
number of fires and an above-average area burned.
5,897 fires
(avg: 7,389)
3,798,205 ha
(avg 1,647,438 ha)
Numbers based on September 11, 2013 situation report
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2013 Prediction
Most of the activity and area burned occurred in Manitoba and Quebec in June-July;
and Saskatchewan and Southern NWT in July-August. 11
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2013 Prediction
August
May June
July September
April
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2013 Fire Activity
August
May June
July September
April
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North American Seasonal Assessment
The forecast included Quebec as an area of concern in the
North American Seasonal Assessment. 14
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2013 Prediction
In summary, the forecast captured the fire
activity in Northern Prairies and southern
NWT.
While the prediction did not capture the
activity in Quebec, input from other seasonal
forecast models indicated this as an area of
concern.
All in all, this was not a dramatic year for fire
in Canada and the model indicated such. 15
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2014 Seasonal Prediction
Starting Conditions
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Spring Start-up Conditions
The Canadian Forest Fire Weather Index
(FWI) System allows for the carry-over of fall
conditions to the spring.
This is handled by the Drought Code (DC)
(similar to the 1000 hour moisture code).
All other moisture codes in the FWI system are
reset.
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Fall Conditions
Fall DC values show
extreme (dry)
conditions throughout
much of Western
Canada and the
Territories.
Most of the snow fell in
November and
December in western
Canada.
Oct 21, 2013
http://cwfis.cfs.nrcan.gc.ca/maps/fw?type=dc&year=2013&month=10&day=21 18
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Spring Start-up Conditions
North American
Drought Monitor
indicates a
relatively normal
pattern across
all of Canada.
http://www.ncdc.noaa.gov/temp-and-precip/drought/nadm/nadm-maps.php 19
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Overwinter Snowfall
Much of Canada
was under snow
cover until May,
thus Canada
experienced a late
start to the fire
season.
http://www.natice.noaa.gov/pub/ims/ims_gif/DATA/cursnow_usa.gif
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Overwinter Snowfall
Snow amounts
ranged from 60%
to 150% of normal
in Canada.
There are spots in
Northern
Saskatchewan/
Manitoba and in
northwestern
Ontario suggesting
below average
conditions. http://www4.agr.gc.ca/DW-GS/current-actuelles.jspx?lang=eng&jsEnabled=true 21
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Spring Start-up Conditions
As spring has
passed and the
snow melted, we can
see the Drought
Code conditions
across Canada.
http://cwfis.cfs.nrcan.gc.ca/maps/fw?type=dc&year=2014&month=6&day=1 22
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Spring Start-up Conditions
Compared with mean
June conditions, the
only area of above-
average appears to
be the Alberta/NWT
boundary.
http://cwfis.cfs.nrcan.gc.ca/ha/fwnormals?type=dc&month=6 23
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2014 Conditions The 2014 fire season is off to a slow start with below average number of
fires and an area burned far below normal.
1,195 fires
(10-yr avg: 1,968)
25,865 ha
(10-yr avg 120,843 ha)
Numbers based on June 1, 2014 situation report
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2013 Condition The 2013 data is shown here again for comparison.
5,897 fires
(avg: 7,389)
3,798,205 ha
(avg 1,647,438 ha)
Numbers based on September 11, 2013 situation report
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2014 Seasonal Prediction
ENSO Pattern
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ENSO Pattern
El Niño–Southern Oscillation is a band of warm ocean water
that can develop off the western coast of South America.
Extremes in this oscillations cause extreme weather (such as
floods and droughts) in many regions of the world.
El Niño and La Nina events tend to develop during the period
Apr-Jun and they
• Tend to reach their maximum
strength during Dec-Feb
• Typically persist for 9-12 months,
though occasionally persisting for
up to 2 years
• Typically recur every 2 to 7 years 27
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El Niño Effects
El Niño leads to below-average precipitation in central BC, Alberta and
Saskatchewan, southern Ontario and Nova Scotia
Summer
Temperature Precipitation
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ENSO Pattern
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/figure6.gif
Most models
indicate neutral
ENSO conditions
moving into an El
Niño later this
summer.
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ENSO Pattern
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/figure6.gif 30
Most models
indicate neutral
ENSO conditions
moving into an El
Niño later this
summer.
The Canadian
CMC CANSIP
model is
producing a
median prediction
among these
models.
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ENSO Pattern
http://iri.columbia.edu/our-expertise/climate/forecasts/enso/current/?enso_tab=enso-cpc_plume
A move into
El Niño
conditions
this summer
is illustrated
by the
consensus of
models.
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2014 Seasonal Prediction
CMC Forecasts
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Seasonal Forecasts
June temperature
anomalies are above-
average for BC and
parts of Alberta and
Yukon. Also northern
Quebec, Labrador
and Nova Scotia.
Below-average
conditions are
expected to persist in
central Canada.
June 33
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Seasonal Forecasts
Early summer temperatures continue to be above-average in western
Canada and the Atlantic, while low in Ontario and Manitoba.
Precipitation anomalies are low for southwestern BC, while high for the
Atlantic regions affected by the above-average temperature conditions.
June-Jul-Aug
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Seasonal Forecasts
Late summer sees the above-average temperature spread across most
of western Canada and into Ontario.
Precipitation anomalies are low in southern BC and minor elsewhere.
Jul-Aug-Sep
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Seasonal Forecasts
Fall could see above-average temperature anomalies for much of
Canada south of 60o N.
Precipitation anomalies are negligible.
Sep-Oct-Nov
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2014 Seasonal Prediction
Model Predictions
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June 2014
Above-average condition occur in southern BC.
Confidence is moderate-to-low in this area.
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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July 2014
Above-average condition expand to cover most of BC as
well as parts of Alberta, the Yukon and NWT.
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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August 2014
Above-average conditions continue in southern BC and
Alberta while it expands to cover much of northern Alberta,
central NWT and parts of Saskatchewan.
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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September 2014
As fall takes hold, above-average severity expands to
cover most of western Canada and western Ontario
(though confidence is low).
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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Kamloops 2014
For Kamloops, entire summer is above-average
temperature and below-average precipitation.
Temperature Precipitation
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Kamloops 2014
Elevated (but erratic) BUI conditions during much of summer.
CSSR conditions will be high in July and August.
BUI CSSR
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Whitehorse 2014
For Whitehorse, June through August may be 1-2oC
above normal with lower precipitation
Temperature Precipitation
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Whitehorse 2014
Elevated BUI conditions in June could carry on high
CSSR conditions into July and August.
BUI CSSR
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Current Conditions - Nova Scotia
Fire weather conditions in Nova Scotia are currently very
high to extreme. 46
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Halifax 2014
For Halifax, may continue to see above average
conditions but these will likely subside in July.
Temperature Precipitation
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Halifax 2014
This is shown by average BUI and CSSR predictions for
the remainder of the summer.
BUI CSSR
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2014 Seasonal Prediction
Provincial Reports
(produced in April)
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British Columbia
Considering the fall DC anomalies, the greatest potential for
above normal weather station start-up codes is in the West
Chilcotin and adjacent Coastal FC and the western NWFC.
Other areas with that potential are in the lee of the southern
Coast Mountains and some areas in the Upper Columbia
basin.
Outlook through September is for an equal chance of above,
near or below normal precipitation, most models checked
show an increased probability of above normal temperatures,
especially in western BC.
Should a significant El Nino develop this summer, warmer
than normal conditions could extend further into the fall and
through the winter. 50
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Yukon
Season ending drought codes were generally high throughout
Yukon and look to start the season in the moderate to high
range in Northern Tutchone, Tatchun, Kluane and Southern
Lakes.
Climate agencies are in agreement regarding a greater than
50% chance of El Nino conditions by fall 2014, but there is
uncertainty regarding the precise timing. An El Nino has a
statistically significant effect on Yukon weather, so depending
on timing and strength we may see warmer than usual
conditions in late summer or fall. There will be no effect
during the core fire season.
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Saskatchewan
This spring, the threat is somewhat present in sections of the
Observation Zone and along the wildland-agricultural
interface. If the coming months are dry, the area could
increase within the southern half of the Full Response Zone.
The potential severity of the fire season could increase in the
Full Response Zone this spring if the current cold climatic
regime shifts to a drier and warmer spring regime.
Environment Canada does suggest a transition to a warmer
June-July-August regime while the US Experimental Climate
Centre does suggest a very warm and drier regime for the
summer months.
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2014 Seasonal Prediction
Summary
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North American Seasonal Assessment
The North American Seasonal Assessment is a joint US/Canadian/Mexican
product. This map was constructed May 1 for Canada. It is likely a larger
area of BC and possibly Alberta/NWT may see above-average fire activity. 54
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2014 Prediction
In summary, Canada is experiencing a late
start to the fire season.
As summer develops, above-average fire
weather conditions will cover the Yukon and
northern BC. This will expand later in the
summer to cover much of BC as well as parts
of Alberta and NWT.
No appreciable fire weather conditions in the
rest of Canada.
All in all, this appears to be a mild fire season. 55
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The End
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