Saturday, November 15, 2008
Wildland fire activity remains light throughout most of the country. Yesterday, seven new fires were reported in California, one of which became a large fire. Currently, two major fires are burning in California. The Tea fire is 1,800 acres and has burned 111 residences. The new Sayre fire is 2,600 acres and destroyed 65 structures yesterday.
Significant fire potential continues in Southern California today. A building high pressure ridge across the West will bring warmer temperatures and drier conditions. Strong offshore winds in combination with low humidity and unseasonably warm temperatures will continue today across the southern mountains and valleys of Southern California. Widespread showers associated with a cold front will move across the east.
Sayre (Los Angeles City Fire Department): 2,600 acres at zero percent contained. This fire is three miles northeast of San Fernando. Numerous residences and power lines are threatened. A mandatory evacuation notice is in effect for the North West valley. Information: Call (800) 439-2909 or visit the web-site
Tea Incident (Montecito Fire Department): 1,800 acres at 40 percent contained. The fire is located one mile northeast of Montecito. About 1,500 residences are threatened. Mandatory evacuations are in effect in Montecito, Santa Barbara City and areas within Santa Barbara County. An early warning notification system helped to evacuate 4500 residents and communicated a voluntary evacuation of an additional 4500 residents. Information: Call 805-681-5197 or visit the
California Department of Forestry and Fire Protection
HOW TO READ PROPAGATION NUMBERS
The A index [ LOW is GOOD ]
- 1 to 6 is BEST
- 7 to 9 is OK
- 11 or more is BAD
Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.
A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
SFI index [ HIGH is GOOD ]
- 70 NOT GOOD
- 80 GOOD
- 90 BETTER
- 100+ BEST
The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.
Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.
K index [ LOW is GOOD ]
- 0 or 1 is BEST
- 2 is OK
- 3 or more is BAD
- 5 is VERY VERY BAD
The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.
A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
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