Latest LA area simulation

The old computer that I had running this very old model developed problems on 30 Sept 2012. I may not install and run this model on another machine.

The WRF model for SoCal is still running. Travis Wilson's presentation of the WRF model output is much, much better than mine.

54 hour simulation using the NCAR/Penn State Mesoscale Model version 5 (MM5), subversion 3.7.3, commencing at 4 AM PST (5 AM PDT) on the date shown in the upper left corner of the forecast plots. Most of the pictures below show the 3 PM PST (4 PM PDT) forecasts for Days 1 and 2. Clicking on most pictures generate animations (or at least larger sized images).

If older images appear here, you may need to reload/refresh this page

The LA area WRF run is here. This run usually finishes by noon PST.

The MM5-WRF simulation comparison page. Check dates on the runs. Should be coordinated by noon PST.

Experimental wind and humidity measures

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Maximum 10 m wind speed (mph)	Minimum near-surface relative humidity (%)

Maximum dew point depression at 2 m (deg. C)	Maximum SAII index

New Santa Ana index time series	SLP difference Daggett-LAX	Dewpoint depression at LAX

More plots:
850 mb max wind min RH
950 mb max wind min RH
Drying ratio

Time-height plots at LAX

Click image to enlarge in new window

Near-surface air temperature and winds

3 PM PST (4 PM PDT) forecast of 2 m temperature and 10 m winds is shown for Days 1 and 2. Animations open in new windows.

54 hour animation (click here)

54 hour frame-by-frame animation (click here)

Day 1 (11h forecast) Day 2 (35h forecast)

Low-level relative humidity and winds at 750 m

3 PM PST (4 PM PDT) forecast shown for Days 1 and 2. Animation opens in a new window.

54 hour animation (click here)

Day 1 (11h forecast) Day 2 (35h forecast)

Precipitation

Forecast precipitation accumulation. Clicking on image will spawn hourly animation in new window.

Vertical cross-sections

Basemap for these vertical cross-sections

Cross-section "A": West to east from the Channel Islands past the Banning area, showing winds and temperatures (in Celsius) at 3 PM PST (4 PM PDT) on Day 2 over the lowest 3 km. Clicking on image will spawn hourly animation in a new window.

Cross-section "B": As above, but southwest-to-northeast crossing San Nicolas Is to near Mojave. Cross-sections "A" and "B" intersect near Pt. Dume. Clicking on image will spawn hourly animation in a new window.

Cross-section "C": Northwest to southeast across the Tehachapi Mtns to the San Bernardinos. Shown is a clear air turbulence index along with winds. Clicking on image will spawn hourly a nimation in a new window.

Precipitable water and 4 km winds for Domains 2 and 3

Precipitable water (in millimeters) and 4 km winds at 3 OM PST (4 PM PDT) for Day 2. Clicking on images will spawn hourly animations in new windows.

Domain 2 Domain 3

Lifting condensation level (LCL) for Domain 2

Lifting condensation level (in meters) at 3 PM PST (4 PM PDT) on Day 2. Clicking on image will spawn hourly animation in a new window.

Plots for Pasadena

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Time-height plots for temperature, RH and wind (below about 600 mb only)

Time series of 2 m temperature (F), RH (%), wind speed (kts) and wind direction (degrees CW from N)

Time series plots for selected locations

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Other plots

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Page created by Robert Fovell