Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Red Flag Potential

RED FLAG POTENTIAL INDEX

RFPI - Day 2

RFPI - Day 3

RFPI - Day 4

Risk Category	Negligible	Low	Moderate	High	Very High	Extreme
Index Value	0	1-2	3	4	5	6

These graphics are products designed to provide guidance information on the potential for, and areal coverage of, Red Flag Fire Weather conditions developing during the "Day 2" through "Day 4" forecast periods (i.e., tomorrow and the next two days) over the area for which NWS Las Vegas has forecast responsibility. The index ratings are based on forecasts of afternoon boundary layer relative humidity and mean 20-foot, 10-minute average winds. It is important to understand that the three states for which WFO Las Vegas provides Fire Weather support each define the threshold criteria for triggering a Fire Weather Watch or Red Flag Warning differently. Qualifying factors such as fuel moisture content, minimum duration requirements of the mean wind threshold, or the potential for "dry lightning" are not considered in the creation of the Red Flag Potential Index (RFPI) product. It simply provides a source of quick reference, visual information regarding the basic meteorological conditions which "might" signal the development of local Red Flag conditions.

These images are not intended to be used as stand alone products for operational planning and decision making. They are being created from a digital forecast data base as a resource for adding value to the traditional, official forecast products routinely generated by the National Weather Service. The product is refreshed twice per day, generally by 4 AM and 4 PM PDT.

Note: All locations outside the WFO Las Vegas area of forecast responsibility are colored gray.

VEF RSS Feed

Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

Local Graphical Forecasts