Record Heat Continues Building in Northwest, Southwest U.S. Western Canada Also Affected

Image (click to enlarge): Surface temperature at 1 pm PDT, July 28, from Unisys

5 PM PDT Update: Washington/Oregon high temperatures, as of 5 pm PDT:

SEATAC AIRPORT 97 (ties daily record)
MCCHORD AFB    98
PUYALLUP       99
FORT LEWIS     99
SHELTON       103  
OLYMPIA       101
KELSO         106 
VANCOUVER     106
PORTLAND      106 (1° short of all-time July high)
THE DALLES    108 

3 PM PDT Update: Latest temperatures:
Portland 102° (new daily record, unofficial)
Seattle 95°
Olympia 98°

2 PM PDT Update: The 2 pm temperature of 100° at Portland is only 1° short of the record for July 28 set in 1998. The all-time July high temperature record in Portland is 107° at the airport in 1965 and downtown in 1942.

Original post:
The record heat continues to build this afternoon in the West, especially the Pacific Northwest. It's not official until midnight, but a record high minimum temperature was set this morning in Phoenix:

...RECORD HIGH MINIMUM SET AT PHOENIX AZ TODAY...

THE LOW TEMPERATURE OF 92 DEGREES TODAY...28 JULY 2009...SET THE
RECORD HIGH LOW FOR THE DATE. THE PREVIOUS MARK WAS 91 SET IN 1998. 

Environment Canada issued a Special Weather Statement this morning including the following (temperatures in Celsius; for the metrically-challenged, 35°C is equivalent to 95°F):

An unusually long heat-wave across the south coast of British
Columbia has begun. Temperatures will climb into the mid-to upper 30S
by Wednesday and computer models suggest the heat-wave may last 5 to
6 days. Many daily temperature records such as hottest July xx on
record will be broken and possibly monthly temperature records such
as hottest July day on record. 

An extended heat wave early last month broke a number of temperature records around the province:
20 B.C. high-temperature records fall in heat wave

By 1 pm PDT today, temperatures at many locations in western Washington and Oregon were well into the 90s:

SEATTLE, TACOMA, EVERETT, AND VICINITY  
   
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS  
SEATAC AIRPORT MOSUNNY   89  65  44 W8        29.90F HX  91             
MCCHORD AFB    SUNNY     93  64  37 NW9       29.89F HX  94             
EVERETT        SUNNY     87  62  43 VRB5      29.92F                    
BOEING FIELD   SUNNY     89  64  43 NW6       29.87F HX  90             
RENTON         SUNNY     91  67  44 NW8       29.86F HX  94             
PUYALLUP       FAIR      93  64  38 MISG      29.93F HX  95             
BREMERTON      SUNNY     90  61  37 NE7       29.92F                    
FORT LEWIS     SUNNY     92  65  40 W8        29.88F HX  94             
SHELTON        SUNNY     94  64  37 S5        29.86F HX  95             
TACOMA NARROWS SUNNY     89  63  41 NE7       29.89F HX  90         

SOUTHWEST INTERIOR  
      
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS  
OLYMPIA        SUNNY     95  63  34 NE8       29.88F HX  96             
CHEHALIS         N/A     95  64  36 N9        29.88F HX  97             
TOLEDO         NOT AVBL                                                 
KELSO          SUNNY     95  64  36 W5        29.84F HX  97             
SCAPPOOSE, OR  SUNNY     97  66  36 NE6       29.83F HX 100             
VANCOUVER      SUNNY     98  61  29 VRB6      29.83F HX  98             
PORTLAND, OR   MOSUNNY   96  64  34 W7        29.83F HX  98             

CASCADE MOUNTAINS AND COLUMBIA GORGE  
      
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS  
STAMPEDE PASS  SUNNY     85  53  33 VRB3      30.11F                    
TROUTDALE, OR  SUNNY     97  67  37 NW5       29.81F HX 101             
THE DALLES, OR SUNNY    101  55  21 SW3       29.82F HX  99     

EAST SLOPES  
      
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS  
OMAK           SUNNY     93  52  24 CALM      29.93F HX  90             
WENATCHEE      SUNNY     94  52  24 VRB3      29.91F HX  91             
ELLENSBURG     SUNNY     97  58  27 E9        29.94F HX  96             
YAKIMA         MOSUNNY   97  59  28 VRB3      29.89F HX  96             

COLUMBIA BASIN  
      
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS  
EPHRATA        SUNNY     94  55  26 VRB5      29.92F HX  92             
MOSES LAKE     SUNNY     94  54  25 NE7       29.92F HX  92             
HANFORD        MOSUNNY   97  57  26 NE8       29.87F HX  96             
PASCO          SUNNY     96  61  31 VRB3      29.87F HX  96             
HERMISTON, OR  SUNNY     98  56  24 VRB5      29.87F HX  96