Showers are turning light and tapering off along the western
foothills, but healthier showers will continue over central and
eastern portions of the forecast area today. The risk of flooding
continues.
* WHAT...Flooding caused by excessive rainfall is possible, along
with flash flooding over recent burn scars.
* WHERE...Southeast Montana and Sheridan County Wyoming.
* WHEN...Through this afternoon.
* IMPACTS...Excessive runoff may result in flooding of creeks and
other low-lying and flood-prone locations. Flooding may occur in
poor drainage and urban areas. The risk of flooding will diminish
late this afternoon and evening as showers taper off.
* ADDITIONAL DETAILS...
- The heaviest rainfall is slowly shifting eastward to southeast
Montana and northeast Wyoming.
- The Elk and McGhee-Remington burn scars are particularly
vulnerable to flash flooding and debris flows. Any other burn
scars from this summer will have elevated flash flood potential
as well.
- http://www.weather.gov/safety/flood
What to do
Monitor the latest forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
Flood Watch issued September 20 at 2:10AM MDT until September 20 at 6:00PM MDT by NWS Riverton WY
Issued Until 13 hr 1 min left
Areas Owl Creek and Bridger Mountains, WY; Bighorn Mountains West, WY; Bighorn Mountains Southeast, WY; Northeast Johnson County, WY; Southeast Johnson County, WY
* WHAT...Flash flooding caused by moderate to heavy rainfall is
possible, especially in terrain and poor drainage areas.
* WHERE...Portions of central and north central Wyoming, including
the following areas, in central Wyoming, Owl Creek and Bridger
Mountains. In north central Wyoming, Bighorn Mountains Southeast,
Bighorn Mountains West, Northeast Johnson County and Southeast
Johnson County.
* WHEN...Through this afternoon.
* IMPACTS...Excessive rainfall may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas and around
steep terrain.
* ADDITIONAL DETAILS...
- A slow moving weather system will bring rounds of showers and
thunderstorms to the region. Any shower or thunderstorm could
produce moderate to heavy rainfall across the Watch Area.
- http://www.weather.gov/safety/flood
What to do
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
ESFRIW
Periods of showers and thunderstorms are expected across the northern
half of Wyoming Saturday and Sunday as a wet weather system shifts
east across the state. This weather system is funneling abundant
tropical moisture into northern and eastern portions of the state
with it's eastward progression. Given the high moisture content, many
thunderstorms could feature heavy rainfall and possibly lead to
localized flooding. Poor drainage areas, urban areas, and steep
terrain will be the most susceptible locations for this isolated
flooding.
Many locations could see an additional 0.5" to 1.25" of rain through
Sunday afternoon, with a majority of this rain falling quickly in
thunderstorms.
Remember, if you encounter a flooded roadway, turn around don't down!
The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
Watch
Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
Advisory
A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
Statement
Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.
Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.
Sources
Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.
