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Weather Blog - June 2010

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Incredible lightning display across Chicago
Jun 25, 2010 at 5:55 AM PDT
Spring was a mess, but how about that winter?
Jun 22, 2010 at 11:13 PM PDT
This week is lightning safety awareness week!
Jun 22, 2010 at 6:42 AM PDT
What makes 24% of you tick?
Jun 21, 2010 at 7:28 PM PDT
Watch up close as tornado rips apart Billings sports arena
Jun 21, 2010 at 3:55 AM PDT
Sign the 'Dog Days of Summer' are near?
Jun 17, 2010 at 9:12 PM PDT
The wettest 19 minutes you'll ever see?
Jun 16, 2010 at 5:00 PM PDT
At 18,000 feet, the air is colder here than arctic Canada
Jun 16, 2010 at 12:24 AM PDT
So, is there any hope for a sunny summer?
Jun 14, 2010 at 9:00 AM PDT
Warm Saturday… but not warm enough to shut us up
Jun 13, 2010 at 6:45 AM PDT
'Juneuary' a more apt name for this month than you might think
Jun 11, 2010 at 6:19 PM PDT
Take a (virtual) ride in a weather balloon to 100,000 feet!
Jun 10, 2010 at 6:48 PM PDT
Potpourri blog: The new radar, cool photos, and should forecasts STOP SHOUTING?
Jun 8, 2010 at 6:02 PM PDT
Tired of the spring gloom? I think I found the culprit…
Jun 7, 2010 at 9:00 AM PDT
A good visualization of how tornados start
Jun 5, 2010 at 4:33 PM PDT
Powerful storm rolls through Idaho's Treasure Valley
Jun 4, 2010 at 11:21 PM PDT
Cool "noctilucent" cloud season begins with spectacular show
Jun 4, 2010 at 6:39 PM PDT
Proof that Sequim can be a place to escape the rain
Jun 3, 2010 at 7:36 AM PDT
Welcome to 9 million square miles of storminess
Jun 2, 2010 at 6:33 PM PDT
Approaching storm made news two weeks ago
Jun 1, 2010 at 8:48 PM PDT

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About Scott Sistek

Meteorologist

Recent Posts

Weather Brrr! Seattle, Portland briefly tied for coldest major city in lower 48

By Scott Sistek Published: May 22, 2013 at 11:37 AM PDT Last Updated: May 22, 2013 at 1:08 PM PDT

Does it feel a bit like January out there today? Your skin does not deceive you.

A cold system from the Gulf of Alaska has settled into the Pacific Northwest, bringing not only a steady winter-like rain but has kept temperatures stuck in the 40s(!) through the late morning.

In fact, at 11 a.m., Seattle was stuck at 46 degrees -- about the average high for mid January. It's so cold in the Northwest that Seattle and Portland were tied as the coldest major cities in the lower 48 states -- and it wasn't even close! (Boise was at 50. Anchorage was also at 46. If we do lower our population threshold for "major city", Spokane checks in at 41.)

Portland would gradually take the trophy by itself as Seattle later warmed into the low 50s as Portland remained stuck in the mid 40s.

Weather How tornado victims got 36 minutes of precious warning time (Photo Gallery)

By Scott Sistek Published: May 21, 2013 at 12:18 PM PDT Last Updated: May 22, 2013 at 10:43 AM PDT

Thirty-six minutes.

That might not seem very long -- roughly about the time it takes to wade through your hourly drama if you blaze through commercials. But compared to a few decades ago, 36 minutes of time might have saved countless lives during the devastating tornado that struck Moore, Oklahoma on Monday.

Years ago, the residents of Moore would have likely had no idea the tornado was coming until the twister was sighted, giving people barely a few minutes' notice. But thanks to advancements in technology, tornadoes rarely sneak up on anyone anymore.

In fact, forecasters as early as Wednesday began sounding the alarm for a potential severe weather breakout on Sunday and Monday. And, on Friday, the forecasts became more specific. On Monday, a Tornado Watch, which indicates conditions are right for tornadic development, was issued at 1:10 p.m. for much of Oklahoma, including the greater Oklahoma City area.

Weather "What does ''EF-4'' mean?' and other tornado questions answered

By Scott Sistek Published: May 20, 2013 at 4:10 PM PDT

With tornadoes in the news lately I figured it'd be a good time to post answers to some frequently asked questions about the powerful storms:

What does "EF-4" mean?

WIth the devastating tornado in Moore, Oklahoma, you'll be hearing a lot of about "EF" ratings -- that's from the Enhanced Fujita Scale that rates tornadoes on a scale of 0 to 5, 5 being the strongest.

The Moore tornado was given a preliminary rating of EF-4 ("Devastating") with estimated tornadic wind speeds of up to 200 mph, although many are thinking that rating could be increased to an EF-5 ("Incredible") once more damage assessment is done.

Sadly, it's not the first time Moore has had to deal with such a catastrophic storm. On May 3, 1999, Moore was struck by an EF-5 tornado which recorded the strongest wind speed ever registered near Earth's surface. this map provided by the National Weather Service in Norman, Oklahoma shows just how close the two tracks were.

Weather Northern Lights peek out in Eastern Washington (Photo Gallery)

By Scott Sistek Published: May 18, 2013 at 9:57 AM PDT Last Updated: May 19, 2013 at 12:55 AM PDT

As we mentioned in the blog Thursday, there's a particularly active sunspot on the sun right now.

It had, as its opening salvo while starting to face the Earth, unleashed a moderately strong solar flare that reached us late Friday, triggering a display of the Northern Lights that reached as far south as Colorado.

Weather Northern Lights to be visible around the Pacific Northwest soon?

By Scott Sistek Published: May 16, 2013 at 11:33 AM PDT Last Updated: May 16, 2013 at 1:58 PM PDT

The sun has been getting quite active lately, with one sun spot in particular giving off several explosive flares this week, and it could eventually bring some brilliant displays of the Northern Lights to the Pacific Northwest.

Since Monday, Sunspot AR1748 has already given off four "X-class" solar flares -- X being the most powerful class of flares that have potential to disrupt radio and satellite signals. In fact, that flare has given off more X-class flares than every other sunspot of the past year combined, according to spaceweather.com.

Up to this point, the spot has been on a part of the sun not directly facing Earth, so the flares have been directed away from our planet and not really giving us much of an effect.

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