All posts by wpadmin

Twitter Rain Alarms

https://twitter.com/UDFCD_FWP
Twitter

Twitter users may want to follow this.  We are trying to keep the information simple to limit public confusion.

Automated tweets will be county-specific.  Additional hashtags like #flood, #cowx, #rain may be added.  If you are a Twitter user, you can start following this now.  Simply search for udfcd-fwp.  When heavy rainfall is detected by the ALERT System, you should receive something like:  Heavy rainfall occurring in ___(blank)___ County.

This text will be following by a link that points you to a “light” version of the ALERT GMap with very limited control features that looks like something this… http://t.co/MnVGlHjrdh.  Gmap-LT will show the measured rainfall amounts for the last 3 hours, a transparent looping radar overlay, and the current NWS warning polygons that link to the corresponding NWS warning text.  The rainfall measurement that triggered the tweet will blink (see demo).

Continue using https://alert5.udfcd.org for the ALERT GMap with user controls.

As always, we appreciate your feedback.

New ArcGIS Map

We recently improved one of our Esri ArcGIS Online maps that you may find useful.  The new map shows flood hazard areas, September 2013 flood peaks and hydrography for major drainageways within UDFCD.  Stream names can be displayed by clicking on the streams.  A link can be found on our ALERT System website from the Maps menu.

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Blinking Alarms

A recent update to ALERT GMap causes active alarms to blink and stop blinking when the alarm becomes inactive.  When you click on the blinking station you will see the actual time that the alarm occurred and the threshold that triggered the alarm.

Click here to see a Flash™ video of this feature.

Wednesday Webinars

On July 16, 2014 we broadcast our first in a series of short instructional webinars offered to help local officials improve their storm/flood monitoring and emergency response capabilities, and keep apprised of relevant changes.  That training focused on how to make best use of the ALERT System GMap website, which is one of the more popular features available from https://alert5.udfcd.org.

A Windows Media Player-compatible recording of this webinar is now available.  You can download it from www.udfcd.org/FWP/ALERT/trainingvideos/.

To receive notices regarding future webinars simply subscribe to the FRAUG list at this website.

Alarm Log Update

The ‘alert5’ alarm log output has been updated to include a threshold column.  Click here to see the alarm log for September 9-15, 2013. 

Alarm logs can be accessed from both the GMap Data Menu and the TABLES webpage.  Use your browser refresh button to update the alarm log during events.

ALERT Map & Server Changes

ahps legend1A number of changes have been made this past month to improve the performance of the ALERT Map and timeliness of the XML files that are used by other real-time applications.

  1. A second NovaStar-5 server is now fully operational. This backup server mirrors the primary server database at Diamond Hill, is remotely located, and will failover automatically should the primary server become disabled. The backup unit also permits load sharing of data processing task. This means that XML files accessible from cloud services can be updated more frequently.  Currently all rainfall, water level and weather data files are updated every minute.
  2. The ALERT Map is one application that benefits from the dual-server implementation. Users should note more reliable automatic 1-minute data refresh rates.
  3. Other changes to the ALERT Map include:
    • NWS warning area polygons are turned on by default and provide one-click access to the corresponding NWS warning product. Just click on the icon attached to the polygon to read the NWS warning.
    • WDT looped Radar images are turned on by default reflecting the last hour of activity. All Radar images have their opacity set for 50%, allowing users to easily see the base map. All gaging station readouts overlay on top of the Radar images.
    • Color coding is applied to all ALERT stage and discharge readouts to reflect threat conditions. The colors correspond to NWS AHPS threat levels with the exception of the blue readout, which represents bankfull conditions.
    • USGS and DWR streamgage readouts are displayed on the stage and discharge maps using darker green backgrounds to distinguish their data from the ALERT data. Links to corresponding webpages supported by the USGS and Colorado DWR can be found by clicking on the readout.
    • Time series plots and links to tabular data are available for all ALERT readouts including measured water levels, discharge estimates and rainfall.

We hope you find these improvements useful. As always, your comments and suggestions are welcome.

Google Chrome Advice

Some Google Chrome users have experienced problems with the ALERT Map webpage updating automatically. To fix this we recommend the following:

  1. Make sure you are running the latest version of Chrome, v.35.
  2. To re-load the page try hitting the F5 key.

This YouTube video shows how to enable auto updates for the Google Chrome browser. If your IT department has disabled the auto update feature…this can turn it back on.

ALERT5 Migration

We have migrated our alert5.udfcd.org URL to a new homepage.  This site contains many of the same features available on the previous ‘alert5’ website.  We believe you will find this new page much easier to use, especially those of you who have smartphones, tablets and iPads.   For those who prefer the previous website, convenient links are provided for accessing the old alert5 webpage.

Monitoring streamflow and water levels

[Fraug 5/16/2014] Monitoring streamflow and water levels

ahps legend1We recently updated a number of ALERT webpages with AHPS features.  AHPS is a NWS acronym that stands for Advanced Hydrologic Prediction Service.  See http://water.weather.gov/ahps2/index.php?wfo=bou for more information about AHPS.  The legend provided was acquired from the NWS AHPS website.  The yellow “Near Flood Stage” is also commonly referred to as the “Action Stage.”

Our AHPS-like ALERT webpages use the same AHPS reference levels.  These levels are used by NWS as guidance for issuing flood advisories and warnings. Three UDFCD webpages that currently employ this feature are:

  1. Contrail Stage Summary Table by OneRain
  2. ALERT Maps by WET
  3. ALERT Streamflow Map by LRE