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From the “how come this video exists” department, a tornado is caught crossing the path of a moving freight, from the point of view of the moving freight. Tornado 1, train 0.


The Ephemerata Weather Radar Project pages continue to undergo development.
Intro page:

The intro page graphic now stands alone. To continue on into the website, simply click on the image and you will go there directly.


I’ve now added auto-refresh to the web pages both for the main page and the large image pages for both Scan A and Scan B. These pages will now refresh on a 90 second repeat cycle, and if data is new, will update the screen. Its now possible to put the radar page up on your monitor and watch it auto-update as new data is sent to the hosting server. Monitoring bad weather no longer requires you to manually refresh the display.

Internet Explorer handles this feature slightly differently than Firefox (what else!). When IE refreshes it will return to the top of the page. Firefox will remain on the portion of the page it was displaying when the refresh occurred. I am exploring work-arounds to see if I can get IE to do the same. For most of the pages, the two browsers behave similarly.

The Ephemerata Weather Radar Project is designed around a screen resolution setting of 1024×768. The large image presentations are sized to fit this format size with the browser Full Screen Mode set (F11 toggle on the keyboard). In this mode, coupled with the auto-uploading capabilities of the Storm Predator processor, EWR Project will present a continuously updating web view of the changing radar data as it arrives at the host server. The main pages will do the same in Firefox (IE will require re-aligning of the page). Its important to remember that there is an inherent lag of about 10 minutes to the radar data when monitoring for severe weather. If you live in the GTA, feel free to ask to be put on the mailer for severe weather alerts. These are sent immediately upon the processor receiving the appropriate threshold data (see the EWR page notes for more info).

Extended Information Statement


The 2009 eruption of Redoubt volcano began March 15th, 2009 with a steam explosion. Between March 22nd and April 4th, Redoubt produced multiple significant explosions that sent ash and gas clouds to as high as 65,000 feet (19.8 km) above sea level. After April 4th, the eruption continued with extrusion of a lava dome within the summit crater, eventually producing a blocky lava flow that currently extends ~0.6 miles (1 km) down the north flank of the volcano. Redoubt entered its 14th week of eruptive activity the week of June 22nd.

Observations from overflights, webcam, and satellite imagery have not been able to detect changes caused by dome growth for the past three weeks, thus lava effusion has at least slowed significantly, and may have stopped. Consequently AVO downgraded the aviation color code to YELLOW and the alert level to ADVISORY on Tuesday June 30th, 2009. Volcanic seismicity is still reduced, after a decline in the numbers of earthquakes per day began about May 7th. However, seismicity remains elevated above background. Volcanic gas emissions remain very high, yet have also decreased by about half since early-May. AVO will continue to monitor Redoubt’s activity closely, but will begin to transition off 24/7 staffing. Later updates will describe operational changes as they occur.

Despite evidence for the significant slowing, and possible cessation of its growth rate, the lava dome is potentially unstable and the possibility of a full or partial collapse remains high at present. Such a collapse would likely be accompanied by the production of a large ash plume and lahars in the Drift River valley. This event could occur with little or no advance warning.”

Read the rest of the report here. EWR will continue to maintain the monitoring page.


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RSS Last Alert Issued:

  • GH-GTA Scan Zone Severe Weather Alert #ONStorm October 2, 2016
    SEVERE WEATHER ALERT — 01:35 PM EDT Oct 02 2016 This is an automated alert of potentially severe weather for the Golden Horseshoe/ Greater Toronto/Niagara Peninsula/South-Central Ontario Monitored Area, from Ephemerata Weather Radar. See attached scan image. The alert triggered at 01:35 PM EDT on Oct 02 2016, from radar data analyzed from NWS radar site KBUF […]

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