PDS Flash Flood Emergency in Roanoke, Virginia.
* At 902 PM EDT, gauge reports indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 5 inches of rain
have fallen. Flooding impacts will continue, but no additional
rainfall is expected. Flash flooding is already occurring.
This is a FLASH FLOOD EMERGENCY for The City of Roanoke, and the
city of Salem . This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW!
FLASH FLOOD EMERGENCY in Illinois
495
WGUS53 KLSX 210408
FFWLSX
ILC051-210715-
/O.NEW.KLSX.FF.W.0033.250721T0408Z-250721T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
1108 PM CDT Sun Jul 20 2025
...FLASH FLOOD EMERGENCY FOR CENTRAL FAYETTE COUNTY...
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Northwestern Fayette County in south central Illinois...
* Until 215 AM CDT.
* At 1108 PM CDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 5 and 6
inches of rain have fallen. The expected rainfall rate is 2 to 3
inches in 1 hour. Additional rainfall amounts of 2 to 3 inches are
possible in the warned area. Flash flooding is already occurring.
FLASH FLOOD EMERGENCY for central Fayette County. This is a
PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Law enforcement reported.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW! Life threatening flash flooding of
low water crossings, small creeks and streams, urban
areas, highways, streets and underpasses.
https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=FFWLSX&e=202507210408
Maybe this will make them think twice about cutting NWS but then again, maybe not.
Flash Floods in central Maryland and Washington D.C. prompt water rescues and a Flash Flood Emergency
More than 100 flood-related emergency calls were reported in Montgomery County, Maryland, on Saturday evening, July 19, 2025, after thunderstorms brought up to 127 mm (5 inches) of rain in less than two hours, prompting a Flash Flood Emergency from the National Weather Service. #weather #FlashFloodEmergency #MDwx #DCwx
https://watchers.news/2025/07/20/flash-floods-central-maryland-washington-dc-flash-flood-emergency/
LWX issues Flash Flood Emergency [flash flood: observed, flash flood damage threat: catastrophic] for Montgomery [MD] till Jul 19, 9:00 PM EDT * At 554 PM EDT, Emergency management reports significant flash flooding along the Sligo Creek Watershed. Between 3 and 5 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 30 minutes. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is already occurring. #weather #FlashFloodEmergency #Montgomery #MDwx
https://mesonet.agron.iastate.edu/vtec/?year=2025&wfo=KLWX&phenomena=FF&significance=W&eventid=119&tab=info&radar=USCOMP&radar_product=N0Q&radar_time=202507192150
The state of Texas has a GIS layer that shows building footprints. That data is solid red on this map.
Along the river the area with red diagonals is the ‘regulated floodway’ as identified by FEMA. **Note all the buildings in the floodway**.
The map should also display red lines which show tax parcels. If the red parcel lines do not display when the map opens then try zooming the map out and then in.
The marker on the map is roughly centered on the large Camp Mystic property.
#texas #disaster #flooding #FlashFloodEmergency #TXwx
When this map opens it is centered on the large Camp Mystic property in Texas. The red lines identify parcels. The parcels are clickable.
Along the river the area with red diagonals is the ‘regulated floodway’ as identified by FEMA.
If you play with the map then you will see lots of buildings in the ‘regulated floodway’.
If the red parcel lines do not display when the map opens then try zooming the map out and then in.
#texas #disaster #flooding #FlashFloodEmergency #TXwx
CNN "At least 161 people are known to be missing in Kerr County as a result of the flood, according to Texas Gov. Greg Abbott, who cited “combined law enforcement efforts.”"
#texas #flooddisaster #TXwx #Kerrville #flooding #FlashFloodEmergency
The marker on this map is at Camp Mystic on the Guadalupe River, Texas. This is where many children lost their lives in the flash flood. The dots on the map are clickable federal streamgages. Note that there are no streamgages upriver from the camp.
If there had been a federal streamgage upriver from Camp Mystic then any savvy iOS or Android developer could write an app that lets the user input the unique ID for that gage and then sound an alarm if the water level at the gage increases by a certain amount.
Edit: It looks the the federal government has (or at least had) an app to do just this.
https://accounts.waterdata.usgs.gov/wateralert/
Here is the link to download a csv file with the most recent data from any federal streamgage:
https://api.water.noaa.gov/nwps/v1/gauges/____/stageflow
Replace the underline with the ‘gaugelid’ value which you can get by clicking a gage on the map I posted. This ID is the first attribute value.
#texas #disaster #flooding #FlashFloodEmergency #TXwx
@ai6yr The red lines on this interactive map identify drainage basins. The dots are stream gages. Click a gage and follow the link for near real time data showing the water level. The map also shows the weather radar.
When the map opens it is centered on the drainage basin for the Guadalupe River where many lives were lost due to the flooding.
This map covers the USA. Although most of us (myself included) are not trained weather experts, this map can still give anyone a sense of whether there is a ton of rain happening upstream.
The map covers the USA. The “Map tips” link in the upper left corner will help you get the most benefit from the map.
#texas #disaster #flooding #FlashFloodEmergency #TXwx
AI6YR Ben
Union City, CA Weather
Joseph Elfelt