|GFS Forecast of Relative Humidity created Saturday 20 June valid Sunday 28 June|
|GFS Forecast of Relative Humidity created Monday 22 June valid Sunday 28 June|
Here's the current forecast for Monday. Still plenty of clouds over the Inland NW.
|GFS Forecast of Relative Humidity created Monday 22 June valid Monday 29 June|
So what does this mean? If the clouds do indeed occur, that will help to keep temperatures a bit cooler than previously thought. Also, this moisture could lead to thunderstorm development over the mountains, which might provide further cooling. All of this is still just speculation at this time.
So how hot will it get? Here's our current forecast temperatures for Sunday.
If this verifies, the 102F at Spokane would not only be a record for the day. It would be the hottest June day ever in Spokane (the current record is 101F set in 1992). That's a significant record that could be broken. In fact, a number of locations could set their record for the hottest June day ever.
But as is usual, the computers have some slight disagreements on the exact temperature. Here's an example. The table shows some computer forecasts for Spokane for the Saturday-Monday time frame.
Saturday Sunday Monday
Model A 102 105 98
Model B 98 103 missing
Model C 97 102 96
They're all hot, but some are a little hotter than others.
While the potential cloudiness could keep temperatures a little cooler during the day, they would have the opposite affect at night. Clouds act like a blanket and trap the heat. This could result in some very uncomfortable sleeping weather, especially if you don't have air conditioning. Here's the forecast low temperatures for Sunday night. It's possible that a few locations in the Columbia Basin might not cool below 80F.
Again, the weather often comes down to the details, and the details are the hardest to predict, especially this far out. Suffice to say, it's going to be hot this weekend and possibly the following week. Just exactly how hot will it be? Will there be any clouds? Any thunderstorms? Those details will hopefully get clearer as we get closer to this event. We ended the last blog with a reminder: we had a similar hot forecast for this time of year 2 years ago, and some unexpected showers resulted in cooler temperatures than forecast.