Map Discussion for ATM S 301

Daily Notes

December 6th [Thur]

Show storm gust summary (at bottom, linked image)

Seasonal SST outlook:

Seasaonal prediction center:

http://www.cpc.ncep.noaa.gov/products/predictions/multi_season/13_seasonal_outlooks/color/churchill.html

La Nina teleconnections:

December 5th [Wed]

The Aftermath:

http://seattletimes.nwsource.com/html/localnews/2004051770_webrescue04m.html

Yesterday's radar, shower bands:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?atx_n0r+/24hr/15min

Review of Quarter's weather, 12 weeks, ATG Roof:

http://www-k12.atmos.washington.edu/k12/grayskies/nw_weather.html

National Climatic Data Center, monthly climate summary:

http://www.ncdc.noaa.gov/oa/climate/research/2007/oct/oct07.html

US Summary Maps for three months Aug/Sep/Oct:

http://www.ncdc.noaa.gov/oa/climate/research/2007/oct/3month.html

December 4th [Tue]

State of emergency in Western Washington:

http://seattletimes.nwsource.com/html/localnews/2004049820_webweather03m.html

Here are some peak 24-hour precip amounts ending Monday evening 3 Dec 2007:

LFRST, Lake Forest Park, 4.44 inches (2100 PST 3 Dec 2007) STLGL, 115th and Greenwood: 4.65 inches (2100 PST 3 Dec 2007) CSEW, Sand Point NWS: 5.07 inches (2100 PST 3 Dec 2007) UW, Atmospheric Sciences U of WA: 4.37 inches (2200 PST 3 Dec 2007) SETLE, Capitol Hill, 4.39 inches (2100 PST 3 Dec 2007) PACSC, Pacific Science Center, 4.40 inches (2100 PST 3 Dec 2007) KBFI, Boeing Field, 4.33 inches (2200 PST 3 Dec 2007)

Here are some coastal wind gusts from the past 24 hours:

...NORTH OREGON COAST... BAY CITY (NEAR TILLAMOOK).............. 129 MPH CAPE MEARES (TYPICALLY HIGH BIAS)...... 114 MPH BEFORE POWER LOSS TILLAMOOK BAY TIDE GAGE................ 100 MPH ROCKAWAY BEACH......................... 87 MPH ASTORIA (WEST SLOPE)................... 86 MPH (SUSTAINED 45-50 MPH) CLATSOP SPIT........................... 85 MPH (SUSTAINED 70 MPH)

Still raining, but.... Some 24-hour totals added up [in]...

In 2003 when Seatac blew away its previous record with just over 5" in 24 hours, UW had less than 3" in any one 24-hour period.

I'd guess today's 4.38" (4.48") is the greatest 24-hour rainfall for the city of Seattle: in 1921 the Federal building (in the city) had its greatest amount while records were kept there: 3.52", and the #2 rainiest Seatac day since records have been kept there is 3.74" (1981). In 2003, when KSEA broke its record, Boeing Field had 4.04 inches.

River flow:

http://www.nwrfc.noaa.gov/river/river.cgi?zoom?0?1.1.1.1.0_1.1.1.1_1?select?62,300?62,300

Urban Street Flooding:

http://seattletimes.nwsource.com/html/home/index.html

Pineapple Express:

http://www.ssmi-data.com/idx/ion-p.exe?ION__V1=year%3AINT%3A2007&ION__V2=month%3AINT%3A12&ION__V3=day%3AINT%3A3&ION__V4=pass%3AINT%3A1&ION__V5=satname%3ASTR%3AF14&ION__V6=boxx%3AINT%3A60&ION__V7=boxy%3AINT%3A60&ION__V8=zoom%3AINT%3A2&ION__V9=CENTER_X%3AINT%3A194&ION__V10=CENTER_Y%3AINT%3A249&ION__V11=color_style%3ASTR%3Aabsolute&ION__E1=UPDATE%3Aion%3A%2F%2Fssmi_daily.ion&ION__E2=CENTER_IMAGE%3Aion%3A%2F%2Fssmi_daily.ion&user_year=2007&user_month=12&user_day=3&user_pass=0&user_satname=F14&user_boxx=60&user_boxy=60&user_zoom=2&UPDATE.x=82&UPDATE.y=20&user_color_style=absolute

December 3rd [Mon]

Reconnection of the jet:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?h500_slp+/-168//

Alaska upper air data:

http://weather.uwyo.edu/cgi-bin/sounding?region=naconf&TYPE=GIF%3ASKEWT&YEAR=2007&MONTH=12&FROM=0100&TO=0400&STNM=70026

Compared with days before:

http://weather.uwyo.edu/cgi-bin/sounding?region=naconf&TYPE=GIF%3ASKEWT&YEAR=2007&MONTH=11&FROM=2700&TO=2912&STNM=70026

MM5 forecast from Saturday morning:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007120112//72/3

Today's forecast:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+//72/3

Precipitation over the weekend:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?radar_us+/60/1

Seatac Meteogram:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?meteogram_ksea+/2d/2h

ATG roof:

http://www-k12.atmos.washington.edu/k12/grayskies/nw_weather.html

Mountain weather:

http://slum.dyndns.org:8090/plots/plots.html

November 30th [Fri]

500 hPa height and SLP:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

1000-500 hPa thickness, and 700 hPa winds

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?thkn_700wind+/-168//

500 hPa height and SLP:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?h500_slp+/-168//

New Surface Low Pressure system spinning up just offshore (robust: check dModel/dt):

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+v2007120121///+-st

Unusual for storms to form here (see slide 5 which shows storm genesis climatology)

http://www.ecmwf.com/newsevents/meetings/workshops/2006/re-analysis/presentations/hoskins.pdf

What's going on?

Development of a new trough just downwind of the huge ridge:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_500t+//72/3

500 hPa heights and vorticity:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_500vor+//72/3

Satellite imagery:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sat_sfc_full+3

Precip (snow?), saturday PM:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_pcp1+//72/1

November 28th [Wed]

http://www.atmos.washington.edu/~ovens/loops/viewer.cgi?/home/disk/stormy/atmos/data/wxdisc/20071127+-fn

Show lake effect snow imagery

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?radar_us+/144/1

NCEP model ensemble: Show spaghetti plots, North Pole view

http://www.cdc.noaa.gov/map/images/ens/ens.html

MM5 72 hour forecast:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+//72/3

Surface temperature:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_tsfcbc+//72/3

November 27th [Tue]

Tropical cyclone tracks:

http://en.wikipedia.org/wiki/Hurricane#Formation

Tropical cyclone seasons:

http://en.wikipedia.org/wiki/Hurricane#Times

Cold front, Quillayute, 24 UTC, 16 PDT

http://www-k12.atmos.washington.edu/k12/grayskies/nw_weather.html

Snow in mountains:

http://www.skicrystal.com/1578.html

Freezing level:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sfc_wa_noid+1

November 26th [Mon]

Show temperature and other records from UW over previous week:

http://www-k12.atmos.washington.edu/k12/grayskies/plot_nw_wx.cgi

Return to more perturbed conditions after very quiet last four days. Note also incredible wave amplitude forecast for Friday 30th November through Sunday 2nd December

500 hPa height and SLP:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

Cold front due to pass over, MM5, T, SLP, winds:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+//72/3

MM5, Precip:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_pcp1+//72/1

Looking ahead. Incredible ridge and jet over N Pole next weekend?

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h250_wind+/-168//

November 21st [Wed]

500 hPa height and SLP:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

UW Obs, 2 days, winds from the North, cold:

http://www-k12.atmos.washington.edu/k12/grayskies/plot_nw_wx.cgi

Satellite:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?ir_common_full+/24h/2h

NW MM5, cold

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+//72/3

Surface temperatures, cold Thursday morning:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_tsfc+//72/3

November 20th [Tue]

Example of gradient wind at 300 hPa:

Slide 2, then go on to explain Jet structure forecast

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_300j+2007112012//72/3

Convergence into lows, away from highs:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007112012//72/3

Effect of friction over land:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_wssfc+2007112012//72/3

November 19th [Mon]

Tropical Cyclone Sidr:

http://en.wikipedia.org/wiki/Cyclone_Sidr

Casualties from Bay of Bengal Cyclones:

http://www.wunderground.com/blog/JeffMasters/comment.html?entrynum=862&tstamp=200711

Pacific Northwest

500 hPa heights and SLP:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

Omega blocking pattern.

IR Satellite imagery:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?ir_common+/48h/3h

Last week of observations:

http://www-k12.atmos.washington.edu/k12/grayskies/nw_weather.html

November 16th [Fri]

Tropical cyclone "Sidr" makes landfall in Bangladesh:

http://www.osei.noaa.gov/iod.html

%http://modis.gsfc.nasa.gov/gallery/images/image11162007_1km.jpg

http://www.wunderground.com/hurricane/ni200706.asp#a_topad

TRMM Satellite, the only radar in town:

The day before:

Quikscat winds:

http://www.remss.com/qscat/scatterometer_data_daily.html?rgn=south_east_asia&size=small

November 14th [Wed]

More storms on their way:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

d(MODEL)/dt for 4am Thursday showing break in prediction of bomb.

Satellite with analyzed fronts:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?fronts_ir+1

Satellite with observations:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sat_sfc_full+1

Drought in US Southeast:

http://www.atmos.washington.edu/~ovens/loops/viewer.cgi?/home/disk/stormy/atmos/data/wxdisc/20071113+-fn

November 13th [Tue]

Monday Windstorm

Strong Winds in the North Sound:

Bellingham timeseries:

http://www-k12.atmos.washington.edu/k12/grayskies/plot_nw_wx.cgi

MM5 forecast from 12Z Monday (5am PST):

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007111212//72/3

Winds at 850 hPa (z=1.5 km) were 70-80 kts

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_ww_850t+2007111212//72/3

Temperature sounding:

Wind sounding:

Last week's forecast bomb:

Latest forecast:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007111300//72/3

Scaled back to minimum pressure of around 960 hPa

November 9th [Fri]

Keeping an eye on next week's "bomb"

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

closer to home:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?h500_slp+/-168//

250 hPa winds and heights

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?h250_wind+/-168//

Satellite IR images from previous 24 hours:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?ir_common_full+/24h/2h

Radar, last 24 hours:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?atx_n0r+/24h/60m

MM5 forecast from 5pm Thursday:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007110900//72/3

Last week's flooding in Villahermosa, Tabasco, Mex.

http://upload.wikimedia.org/wikipedia/commons/1/19/Villahermosa.svg

http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17822

November 8th [Thur]

Return to disturbed conditions:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

SLP and 925 hPa temperature:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007110800//72/3

Storm passing to the North of Vancouver Island overnight tonight.

Observations and satellite:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sat_sfc+3

Hourly temperature soundings:

http://www.atmos.washington.edu/cgi-bin/latest.cgi?profiler.spt

Early light precip:

Radar:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?atx_n0r+/2h/

Well-predicted by model:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_pcp1+2007110800//72/1

November 7th [Wed]

50 Years of satellites:

Sputnik 1: 1957

http://www.nasa.gov/externalflash/SpaceAge/

First meteorological images from space, 1959 [Aug. 1959 – Explorer 6 takes first pictures of the Earth]

First weather satellite: [TIROS I : polar orbiter, 1960, 72 days in orbit, 22000 images of weather systems]

First geostationary satellite, 36000 km above the earth's surface

[May 1974 – SMS-1, 1st geostationary weather satellite]

Where we are today:

[MODIS, "Moderate" resolution spectrometer, 250 m resolution]

%%http://modis.gsfc.nasa.gov/gallery/images/image11042007_250m.jpg

[The A-Train]

http://www-calipso.larc.nasa.gov/about/constellation.html

[Tomorrow....]

http://rsd.gsfc.nasa.gov/rsd/movies/GOES9_1min_long.mpg

November 6th [Tue]

Last gasp of the remnants of Hurricane Noel:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?ir_east_enhanced+/48h/3h

Surface pressure and 500 hPa height:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?h500_slp+/-168//

Show situation over the Pacific NW.

Now, back to the Pacific NW.

FOG: Virtual temperature soundings from Sand Point:

http://www.atmos.washington.edu/cgi-bin/latest.cgi?profiler.spt

Winds:

http://www.atmos.washington.edu/cgi-bin/latest.cgi?profiler

Observations from the roof:

http://www-k12.atmos.washington.edu/k12/grayskies/nw_weather.html

November 5th [Mon]

IR imagery from Friday-Sunday (08:15 Friday-20:15 Sunday)

500 hPa geopotential heights and surface pressure fields:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?h500_slp+/-168//

Start on image 21

Show storm 14:45 Sunday

Passage of system over Caribou sounding station:

http://weather.uwyo.edu/cgi-bin/sounding?region=naconf&TYPE=GIF%3ASKEWT&YEAR=2007&MONTH=11&FROM=0400&TO=0500&STNM=72712

November 2nd [Fri]

Hurricane NOEL, near Bahamas:

http://www.nhc.noaa.gov/refresh/graphics_at1+shtml/083526.shtml?tswind120#contents

Forecasts in good agreement.

Hurricane track:

Satellite imagery, IR east coast:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?ir_east_common+/48h/

PACIFIC NW, forecast:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007110200//72/3

Precip:

http://www.atmos.washington.edu/cgi-bin/latest.cgi?ir

October 29th [Mon]

Review, 500 hPa height, SLP from -7 to +7 days:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007102812//72/3

Previous week had generally ridging conditions and nice weather (apart from Wednesday where the trough passed through)

Entering more unsettled period this week:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+//72/3

TODAY: Rainband

Satellite:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?ir_common_full+1

with fronts:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?fronts_ir+1

Radar:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?atx_n0r+/2h/

East coast stationary front, satellite imagery w/ fronts:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?fronts_ir_east+/24h/

Tropical storm Noel:

http://www.nhc.noaa.gov/refresh/graphics_at1+shtml/024024.shtml?tswind120#contents

Start discussing clouds:

Cloud Identification:

http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/home.rxml

October 26th [Fri]

Persistent rain all day Wednesday. Convergence zone:

Visible and IR satellite image, Wed 24th 20 UTC (13 PDT)

Show quillayute sounding showing top of moist layer at 550 hPa, -10 C, or equivalently about 5 km (15000 ft)

http://weather.uwyo.edu/cgi-bin/sounding?region=naconf&TYPE=GIF%3ASKEWT&YEAR=2007&MONTH=10&FROM=2500&TO=2500&STNM=72797

And for previous 12 hours

Show tops of precip at the height of the hydrolapse:

Evolution of Precip on Radar:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?atx_bref1+/48h/2h

Winds and Temps from 5am PT Forecast Wednesday:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_slp+2007102412//72/3

...and Precip

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_wa_pcp1+2007102412//72/1

what about high resolution:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d3_wa_pcp1+2007102412///1

--

October 24th [Wed]

Link to yesterday's departmental weather discussion by Garrett Wedam:

http://www.atmos.washington.edu/~ovens/loops/viewer.cgi?/home/disk/stormy/atmos/data/wxdisc/20071023+-fn

NOAA Image showing smoke plumes:

http://www.osei.noaa.gov/iod.html

Aerosol optical depth and clouds:

Surface weather observations, 12 UTC (05 PT), TODAY:

Show high pressure still remaining, cold frontal passage:

Rooftop observations, show temperature and winds, passage at 02 UTC YESTERDAY (19 PT) Also show Quillayute, frontal passage several hours earlier:

http://www-k12.atmos.washington.edu/k12/grayskies/nw_weather.html

No rain associated with front.....yet....expected later.

http://www.atmos.washington.edu/cgi-bin/latest.cgi?ir

Forecast:

12km domain MM5: http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_slp+//72/3 36km domain MM5: http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+//72/3

Watch for cold weather

October 23rd [Tue]

MODIS imagery of smoke and dust associated with the Santa Ana winds:

http://rapidfire.sci.gsfc.nasa.gov/realtime/single.php?2007295/crefl2_143.A2007295205500-2007295210000.500m.jpg

http://rapidfire.sci.gsfc.nasa.gov/realtime/single.php?2007295/crefl2_143.A2007295205500-2007295210000.1km.jpg

Aqua MODIS, 20:55, 295, 22nd October:

http://rapidfire.sci.gsfc.nasa.gov/realtime/

GOES visible imagery:

Take a look at Ontario, CA at 11am today:

Temp: 77. Dew point: -13. RH: 3%. Wind NE29G56 (mph)

Quikscat winds:

http://www.remss.com/qscat/scatterometer_data_daily.html?rgn=gulf_of_california&size=small

Warm weather in Pacific NW yesterday, SLP:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_slp+2007102212//72/3

500-1000 hPa thickness:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_thick+2007102212//72/3

October 22nd [Mon]

Santa Ana Winds

Southern Ca observations maps:

http://www.atmos.washington.edu/marka/list.cgi?sfcplots-sca

e.g. 10 UTC (02 PDT) with strong sustained winds. Gusts reported up to 80 mph

Offshore flow immediately visible because of smoke from fires being blown offshore:

http://www.atmos.washington.edu/cgi-bin/latest.cgi?vis

Why the winds?

1. High pressure over SW:

2. Strong surface cooling on high desert plateau

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?ir4km_enhanced+/24h/

Cold winds drain off the high land and down to the ocean, accelerated by the pressure gradient. Adiabatic warming of the winds warms them (hence them being referred to as "Warm winds")

Fovell model study:

http://www.atmos.ucla.edu/~fovell/ASother/mm5/SantaAna/winds.html

Why the fires?

http://drought.unl.edu/dm/DM_west.htm

http://ggweather.com/ca2006rain.htm

October 19th [Fri]

Quikscat wind swath for storm yesterday: 16:50 UTC (approx 9am):

Show passage of surface front across

1. McChord AFB, Tacoma, [18 UTC, 11 PDT] 2. UW, Seattle [20 UTC, 13 PDT] 3. Bellingham [21 UTC, 14 PDT]

http://www-k12.atmos.washington.edu/k12/grayskies/nw_weather.html

Rise in temperature, strong winds behind front Bellingham only had short period in warm sector

Show warm sector for storm on board

Pressure difference along sound Tacoma-Bellingham 6 hPa at 22 UTC : pressure gradient force accelerates winds

October 18th [Thu]

Forecast from 5pm PDT, Wed Oct 17:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007101800//72/3

shows that most recent forecast has the storm a little further south than the previous one, with stronger pressure gradient through the Puget Sound.

Most recent forecast (updates during class):

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_slp+//72/3

Surface wind prediction for Western WA

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d2_ww_wssfc+//72/3

Strong winds along the WA coast:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sfc_wa_pres+1

Surface obs with satellite overlaid:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sat_sfc_full+1

Fronts overlaid:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?fronts_ir+/12h/

Surface obs showing large temp rises:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sfc_wa_noid+6

Go back to satellite and show strong temperature gradients across front:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sat_sfc_full+1

Extensive precipitation with beam blocking West of the Olympics

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?atx_n0r+/2h/

October 17th [Wed]

From Bri Dotson:

You can compare this with the MM5-GFS forecast for the upcoming event:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?mm5d1_slp+2007101700//72/3

Upper level winds (250 hPa heights and wind speed) showing steering flow

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?h250_wind+/-168//

The pressure gradients south of the cyclone look a bit larger for this event.

One thing to note is that the December 2006 event was not of tropical origin, while this event on Thursday is formed as the remnants of tropical depression LingLing , caught up in the upper-level zonal flow.

For example, 500 hPa heights and surface pressure, see Friday 12th October

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_slp+/-168//

and check the IR satellite imagery for this time:

GOES 10: http://www.sat.dundee.ac.uk/geobrowse/geobrowse.php?sat=3&year=2007&month=10&day=12&slot=1200&ch=4&sat_num=11&grid=1&size=1 GMS: http://www.sat.dundee.ac.uk/geobrowse/geobrowse.php?sat=2&year=2007&month=10&day=12&slot=1200&ch=4&sat_num=1&grid=1&size=1

December 2006 event:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?/home/user_www/bdotson/dec2006/d1/slp_t925+all

You can also look at satellite/slp/sfc obs for the December 2006 event in here:

/home/disk/archive/images/satellite/sat_sfc_full/200612/

And compare it with the current ones:

http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?sat_sfc+12

-- TWikiGuest - 17 Oct 2007

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