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| Weather Pattern Loop (Explain This) |
This Afternoon |
Tue - 11/24/09 |
Wed - 11/25/09 |
Thu - 11/26/09 |
Fri - 11/27/09 |
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| Surface Loop (Explain This) |
This Afternoon |
Tue - 11/24/09 |
Wed - 11/25/09 |
Thu - 11/26/09 |
Fri - 11/27/09 |
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| Stability Loop (Explain This) |
This Afternoon |
Tue - 11/24/09 |
Wed - 11/25/09 |
Thu - 11/26/09 |
Fri - 11/27/09 |
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| High Level Haines Index Loop (Explain This) |
This Afternoon |
Tue - 11/24/09 |
Wed - 11/25/09 |
Thu - 11/26/09 |
Fri - 11/27/09 |
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| Fire Weather Threat Indicies (Explain These) |
| This Afternoon |
Tue - 11/24/09 |
Wed - 11/25/09 |
Thu - 11/26/09 |
Fri - 11/27/09 |
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| This Afternoon |
Tue - 11/24/09 |
Wed - 11/25/09 |
Haines / Observed RH Threat Index |
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| This Afternoon |
Tue - 11/24/09 |
Wed - 11/25/09 |
Thu - 11/26/09 |
Fri - 11/27/09 |
Observed RH |
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IR Satellite Image with 500 mb Heights and Winds Documentation
This graphic overlays the upper level winds (500 mb or roughly 20,000 ft) and upper level steering flow (blue lines) on a infrared satellite image. It shows the location of upper level features such as ridges (blue lines bulging northward) and troughs (blue lines sagging southward).
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Current 4km WV Satellite Loop Documentation
This is a satellite loop showing water vapor in the upper atmosphere. Green illustrates areas where there is a high concentration of water vapor in the atmosphere (clouds and possible rain). Dark areas indicate lower water vapor content or areas of very dry (clear skies).
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Current 4km IR Satellite Image Documentation
This is a infrared satellite loop. Infrared measures temperatures in the atmosphere. Warm temperatures show up as black or grey areas. Cooler temperatures appear as shades of white to red and purple. White usually indicates warmer low clouds while the red and purple indicate higher clouds with colder temperatures.
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Current 2km Visible Satellite Image Documentation
This is a black and white visible satellite image. Clouds appear as white while the ground is grey. Snow cover will also appear as white in this image.
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Weather Pattern Loop Documentation
This graphic steps through 24 hour periods of model data. It shows the upper level steering flow (green lines) and moisture in the atmosphere between 10,000 and 20,000 feet. Blues and purples indicate high moisture content (cloudy areas) while the green to orange colors indicate dry air with few if any clouds. Black is the transition area between moist and dry air.
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Surface Loop Documentation
This graphic steps through 24 hour periods of model data. It shows values of near surface relative humidity(RH) greater than 40% with increasingly darker shades of green. Values of 20%-40% are shown orange. Values less than 20 percent range from red (10%-19%) to white (RH<5%). Lines of equal pressure (isobars) are shown with blue lines. Closer spaced lines generally result in faster wind speeds. The black wind barbs show approximate wind direction and speed near the surface.
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Stability Loop Documentation
This graphic shows areas where the atmosphere is unstable (magenta shading), marginally unstable (grey shading), and stable (blue shading). The white lines indicate regions where the best chance of thunderstorm development is expected.
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High Level Haines Index Loop Documentation
This graphic steps through 24 hour periods of model data. Haines index shows where the atmosphere is dry and unstable (yellow and red colors indicating Haines 5 and 6) which is an environment conducive to large fire growth. The cool colors indicate a moist stable airmass.
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Fire Weather Threat 4-Panel Graphics Documentation
The upper left hand corner graphic is the forecast Red Flag Threat Index based on the selected day's projected Minimum Relative Humidity and Maximum Wind Speed. Values range from 1 to 10 and are based on contingency tables developed for each forecast zone. Readings of 6 and higher indicate areas of significant concern for meeting red flag conditions for wind and humidity.
The upper right hand corner is the Red Flag Threat Index for the indicated hour using observed relative humidity and wind speeds. This product updates at 30 minutes past the hour and allows the maximum number of observations to be included.
In the lower left corner of the graphic is the Haines/RH threat index based on the forecasts of high level Haines Index and Minimum RH. Values are scaled to fit between 1 and 6. Values close to 6 indicate a high likelihood of reaching red flag conditions for Haines and RH. The first three images display the forecasted values through day 3. The fourth image displays the index based on the observed RH and forecasted Haines values. The observed product updates at 30 minutes past the hour and allows the maximum number of observations to be included.
In the lower right hand corner of the graphic are images showing the forecasted probability of each day's Minimum RH falling below 15%. The observed RH for the indicated hour is also available.
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6-10 Day & 8-14 Day Outlook Documentation
These graphics show where temperatures and precipitation amounts are more likely to be above normal (orange or green shading) and below normal (blue or brown shading) over the next one to two weeks. Areas in between (white) are likely to receive near normal conditions. Click on the graphics to show an enlarged image.
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Monthly Outlook & 30-90 Day Outlook Documentation
When clicked, these graphics show where temperatures and precipitation amounts are more likely to be above normal (warm shading) and below normal (cool shading) over the next one to three months. Areas in between (white) have equal chances of above, below, or near normal conditions. At any given location, the probabilities must equal 100 percent. For example, if an area is within a 50 percent above normal area, there then a 25 percent chance of near normal and also a 25 percent chance of below normal conditions.
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