Pilot reports (PIREPS) from aircraft encountering the
Okmok volcanic plume over the northwestern and 
northcentral continental US on 18-19 July 2008:

=====================================================

DLN UA /OV DLN 270080/TM 1900/FL320/TP MD80/RM ORANGE 
CLOUD ASSOCIATED WITH VOLCANIC ACTIVITY. NO SMELL, CLR 
ABV/BLW FL320/ZLC

RDM UUA /OV DSD280030/TM 1909/FL310/TP B737/RM LGT ASH 
CLOUD FL320 -ZSE

PDX UUA /OV BTG180060/TM 1912/FL330/TP B738/RM FL330-310 
ASH CLOUD CLR AT FL300 -ZSE

SLE UA /OV BTG180060/TM 1921/FL300/TP B733/RM BAND OF 
SULFER DIOXIDE WEST TO EAST FL300-340 AWC-WEBSWA

PDT UA /OV PDT/TM 1937/FL380/TP NUMEROUS/SK ORANGE HAZE/RM 
VOG 320-380 SMELLS THROAT IRRATATION -ZSE

PDX UUA /OV KPDX/TM 2018/FL320/TP B739/RM VERY THIN PROB 
ASH CLOUD VISIBLE E-W OVER PDX AND MT HOOD AT APPROX FL320 
AWC-WEBASA

LWS UUA /OV MQG130050/TM 2051/FL350/TP B737/RM VOLCANIC 
ASH CLOUD 320-380 -ZSE

LWS UUA /OV MQG 135060/TM 2053/FL320/TP SVRL ACFT/RM 
VOLCANIC ASH CLOUD 320-386 CLIMBING/DESCENDING TO AVOID 
ZLC

MSO UA /OV MLP143070/TM 2053/FLUNKN/TP B737/RM BAND OF 
CLOUDS W/ ORANGE TINT FL300-FL350 AWC-WEBSWA

PDT UA /OV PDT200020/TM 2100/FL290/TP B737/WV 275039KT/TB 
SMOOTH/RM ASH CLOUD APPEARS TO BE DISPERSED IN SEVERAL 
AREAS.MAIN CLOUD LOCATED FURTHER NORTH RUNS W-E AWC-WEBSWA

MSO UUA /OV MSO 120030/TM 2115/FL320/TP CL60/RM ASH CLOUD 
FL320-395 ZLC

PDT UUA /OV PDT085050/TM 2133/FL370/TP CRJ9/RM VOLCANIC 
ASH CLOUD- 2 LAYERS 400-410- TOPS OF 2ND LAYER 360 -ZSE

PDX UUA /OV BTG320028/TM 2208/FLFL34/TP B737/RM ASH CLOUD 
FL350-FL370 -ZSE

PDX UUA /OV BTG160020/TM 2210/FL300/TP B733/RM ASH CLOUD 
FL300-FL340 40NM WIDE MT ADAMS SO TO MT HOOD -ZSE

PDX UUA /OV BTG130100/TM 2216/FL310/TP B744/RM ASH CLOUD 
BASE FL350 -ZSE

SEA UA /OV KSEA/TM 2255/FLUNKN/TP B734/RM ACFT AT FL290 
/ABOVE US ASH 82 SOUTH OF SEA TO 110 SOUTH /LINE RUNS EAST 
WEST AWC-WEBASA

ALW UA /OV ALW300010/TM 2258/FL370/TP A318/RM SULFUR 
DIOXIDE CLOUD REPORTED AOA FL380 -ZSE

LWS UA /OV DNJ340070/TM 2336/FL350/TP B737/RM SULFER 
DIOXIDE CLOUD AOA FL350 -ZSE

BOI UA /OV BOI/TM 2338/FL330/TP B738/RM ASH LAYER OVER BOI 
IS AT FL280 AWC-WEBASA

PDX UUA /OV BTG160110/TM 0027/FL260/TP B734/RM ASH CLOUD 
TOPS FL350 BAS FL280-300 -ZSE

RDM UA /OV KRDM345030/TM 0103/FL290/TP B734/RM ENROUTE SEA 
TO SAN / FL290 WAS BELOW A /CLOUD/ WHICH STREAKED IN A 
WIDE BAND FROM HORIZON TO HORIZON AWC-WEBASA

ISN UUA /OV ISN/TM 0155/FL380/TP A319/RM ASH CLOUD FL360 
MOVG E ZLC

ONP UA /OV KEUG325050/TM 0415/FL260/TP B737/RM ENROUTE SFO 
TO ANC /ASH BAND SOUTHERN EDGE 50NM NW EUG APPEARS TO BE 
IN MID 30S N EDGE 90NM SE TOU AWC-WEBASA

HQM UA /OV KSEA245090/TM 0418/FL260/TP B737/RM ENROUTE SFO 
TO ANC / ASH BAND SOUTHERN EDGE 50NM NW EUG APPEARS TO BE 
IN MID 30S N EDGE 90NM SE TOU AWC-WEBASA