Heavy Rainfall and Flash Flooding in Late September and Early October 2015 — Information Sources

On September 29, 2015, a tropical low-pressure system was bringing heavy rainfall to much of the southeastern United States, including Virginia.  As of October 1, more heavy rain was predicted for the coming days, and Hurricane Joaquin had the potential to affect Virginia.  Below are some information sources for these weather developments and their impacts.

Infrared satellite photo east coast Sep29 2015

Infrared photo of rainfall over eastern United States, as of 10:45 a.m. (1445 Z or Greenwich Mean Time) on Sept. 29, 2015. The large red area in the low right is Tropical Storm Joaquin, which (as of 9/29/15), was predicted to track north, possibly affecting the Virginia coastline the first weekend in October, according to the National Hurricane Center (http://www.nhc.noaa.gov/). Photo from that National Oceanic and Atmospheric Administration (NOAA), accessed at http://www.goes.noaa.gov/ECIR4.html, 9/29/15.


Hurricane Joaquin centered over the Bahamas on October 1, 2015, 10:15 a.m. EDT (1415 Z, or Greenwich Mean Time). Photo taken from the National Oceanic and Atmospheric Administration (NOAA) Web site, http://www.goes.noaa.gov/browsh.html, on 10/1/15.

Information Sources

Virginia Department of Emergency Management (VDEM), online at http://www.vaemergency.gov/.

National Hurricane Center, online at http://www.nhc.noaa.gov/.

Virginia Governor’s Office News Releases: Commonwealth Responding to Flooding, Preparing for More Extreme Weather, 9/30/15; and Governor McAuliffe Declares State of Emergency as Commonwealth Responds to Flooding and Prepares for More Dangerous Weather, 10/1/15.

NWS Forecast Office’s serving parts of Virginia:
*Baltimore-Washington Forecast Office (in Sterling, Va.), online at http://www.weather.gov/lwx/.
*Blacksburg Forecast Office, http://www.weather.gov/rnk/.
*Charleston, W. Va., online http://www.weather.gov/rlx/.
*Morristown, Tenn., Forecast Office (covering far southwestern Virginia), online at http://www.srh.noaa.gov/mrx/.
*Wakefield, Va., Forecast Office, online at http://www.weather.gov/akq/.

Community Collaborative Rain, Hail, and Snow Network (CoCoRaHaS) Daily Precipitation Map for Virginia, online at http://www.cocorahs.org/Maps/ViewMap.aspx?state=usa.

NWS Advanced Hydrological Prediction Center River Observations (map showing status of river gages relative to flood stage), online at http://water.weather.gov/ahps/.  Below is a sample of the kind of graph the site has for each river/stream gaging station, showing current and predicted flows relative to flood stage.

James River (VA) at Scottsville

NWS Storm Prediction Center Severe Weather Event Summaries” online at http://www.spc.noaa.gov/exper/reports/.

U.S. Geological Survey Daily Streamflow Conditions for Virginia, online at http://waterdata.usgs.gov/va/nwis/rt.

Kevin Myatt, Heavier rain expected mid-afternoon to early Saturday [Oct. 3, 2015]; flooding likely, Roanoke Times, 10/2/15.

The Weather Channel, “Flooding State-by-state,” 9/29/15, online at http://www.weather.com/safety/floods/news/flooding-impacts-state-by-state.

06 1230 pmStroubles VT bridge at base flow Sep30 2015 930 amA branch of Stroubles Creek on the Virginia Tech campus in Blacksburg at high water at 12:30 p.m. (upper photo) on September 29, 2015, and back to normal flow at 9 a.m. on September 30 (lower photo).   The National Weather Service reported that Blacksburg received a record single-day rainfall of 4.39 inches on September 29 (see http://w2.weather.gov/climate/getclimate.php?wfo=rnk).

One response to “Heavy Rainfall and Flash Flooding in Late September and Early October 2015 — Information Sources

  1. Pingback: Precipitation Information Sources for Virginia as of September 2016 | Virginia Water Central News Grouper

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