Awatchfire

Chelan County, Washington

Sisi Fire

Burning 31.0 miles south-east of Marblemount and 31.1 miles west of Winthrop, since Friday 14 August.

Map of Washington. The Sisi Fire burns 80 miles from Bellingham and 86 miles from Seattle, and 132 miles from the state capital, Olympia.
The fire sits 80 miles from Bellingham and 86 miles from Seattle.

943

acres burned so far — about 1 square miles

14

days burning so far

0%

of the perimeter held

The picture as of 1:52pm today

The Sisi Fire is easing, but far from out. Ground was still giving off heat 3 hours ago.

Shaded relief map of the Sisi Fire. Amber flames mark every place that gave off heat in the last day; the shading is the shape of the ground.
Heat in the last day Higher ground pale, valleys dark

3hours

since anything was last seen giving off heat — about 11:10am on Friday, local time.

79% less

energy in the last 6 hours of the record than in the 6 before them — the fire was cooler when it was last seen.

29.8miles

is how close the heat has come to Marblemount at any point in the record. In the last day the nearest heat has been 29.8 miles from it, and the closest this fire has come to Winthrop is 29.4 miles, 29.4 in the last day. The two figures are the same because the record is barely a day long: the last day is very nearly all of it.

1.9miles

is the furthest any heat has been seen from the point on the official record — the width of the ground involved so far.

Smoke has been recorded lying over this ground 39 times so far. The thickest of it was thick between 8:00am and 10:00am local time.

One place is burning

0.8 miles north-east of the recorded point

100 readings of heat in the last day — all of the heat seen in that time.

Conditions measured 5.1 miles from the fire: 79°F, air at 26% humidity, a 6 mph wind out of the north.

How it got here

Seven days of record on a day-15 fire

The record here begins at 2:52am on 22 Aug and runs to 11:09am on 28 Aug — 152 hours, 480 readings of heat. The fire is on day 15, so the first 8 days are missing: nothing showed up from above until the fire was large enough and the sky over it clear enough for it to be seen.

Animated map of the Sisi Fire across the whole record, with a time bar along the bottom showing energy released and the local date.
The whole record, 54 frames at 3 hours a frame. The bar along the bottom is energy released; the moving line is the clock.

Day by day 7 days of record

  1. Map for Sat 22 Aug: flames mark every place that gave off heat that day.

    Sat22 Aug

    First readings

    • 63 heat readings
    • Heat from 2:52am to 9:40pm
    • Spread 1.8 miles from the recorded point at its furthest
    • Burning through the pre-dawn, morning, afternoon and night
  2. Map for Sun 23 Aug: flames mark every place that gave off heat that day.

    Sun23 Aug

    Cooling off

    • 37 heat readings
    • Energy 60% down on the day before
    • Heat from 2:34am to 8:42pm
    • Spread 1.6 miles from the recorded point at its furthest
    • Burning through the pre-dawn, afternoon and evening
  3. Map for Mon 24 Aug: flames mark every place that gave off heat that day.

    Mon24 Aug

    Holding

    • 74 heat readings
    • Energy 8% down on the day before
    • Heat from 2:34am to 9:19pm
    • Spread 1.5 miles from the recorded point at its furthest
    • Burning through the pre-dawn, morning, afternoon and night
  4. Map for Tue 25 Aug: flames mark every place that gave off heat that day.

    Tue25 Aug

    Cooling off

    • 61 heat readings
    • Energy 66% down on the day before
    • Heat from 3:00am to 1:42pm
    • Spread 1.6 miles from the recorded point at its furthest
    • Burning through the pre-dawn, morning and afternoon
  5. Map for Wed 26 Aug: flames mark every place that gave off heat that day.

    Wed26 Aug

    Flaring up

    • 84 heat readings
    • Energy 4.1 times the day before
    • Heat from 2:43am to 9:00pm
    • Spread 1.6 miles from the recorded point at its furthest
    • Burning through the pre-dawn, afternoon and night
  6. Map for Thu 27 Aug: flames mark every place that gave off heat that day.

    Thu27 Aug

    The fiercest day

    • 76 heat readings
    • Energy 2.8 times the day before
    • Heat from 2:22am to 9:38pm
    • Spread 1.9 miles from the recorded point at its furthest
    • Burning through the pre-dawn, morning, afternoon and night
  7. Map for Fri 28 Aug: flames mark every place that gave off heat that day.

    Fri28 Auglatest

    Cooling off

    • 85 heat readings — the most of any day
    • Energy 52% down on the day before
    • Heat from 2:05am to 11:09am
    • Spread 1.6 miles from the recorded point at its furthest
    • Burning through the pre-dawn and morning

None of the perimeter is being reported as held. 32 people are assigned to it. It has grown from 0 acres when it was first written down to 943 now. Heat was still showing within the last half-day, and the record still lists this fire as active.