Severe

Significant threat to life or property

Texas Flash Flood Warning Severe | Effective 04-21-2026 06:46

Public safety alert, emergency alert, and weather alert Description: FFWEWX The National Weather Service in Austin/San Antonio has extended the * Flash Flood Warning for... Central Williamson County in south central Texas... * Until 1215 PM CDT. * At 846 AM CDT, Emergency management reported 16 low water crossings are closed due to flooding throughout Williamson County. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash

South Dakota Fire Weather Watch | Effective 04/21/2026 06:21

* AFFECTED AREA...In South Dakota, Dewey, Potter, Faulk, Spink, Stanley, Sully, Hughes, Hyde, Hand, Jones, Lyman and Buffalo. * WINDS...South 25 to 35 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.

Texas Flash Flood Warning | Effective 04/21/2026 05:06

FFWEWX The National Weather Service in Austin/San Antonio has issued a * Flash Flood Warning for... Central Williamson County in south central Texas... * Until 1015 AM CDT. * At 706 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

New York Flood Warning | Effective 04/21/2026 05:20

...The Flood Warning continues for the following rivers in New York... Cayuga Lake At Ithaca affecting Tompkins County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Cayuga Lake at Ithaca. * WHEN...Until further notice. * IMPACTS...At 383.5 feet, The lake level is high enough to flood normally dry areas along the shoreline and may affect some paths, or roads nearest the shore. * ADDITIONAL DETAILS... - At 8:00 AM EDT Tuesday the stage was 383.6 feet.

Texas Flash Flood Warning Severe | Effective 04-21-2026 05:06

Public safety alert, emergency alert, and weather alert Description: FFWEWX The National Weather Service in Austin/San Antonio has issued a * Flash Flood Warning for... Central Williamson County in south central Texas... * Until 1015 AM CDT. * At 706 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is

South Dakota Fire Weather Watch | Effective 04/21/2026 04:48

* AFFECTED AREA...In South Dakota, Beadle, Gregory, Jerauld, Sanborn, Brule, Aurora, Davison, Hanson, Charles Mix, Douglas, Hutchinson, Bon Homme and Yankton. * WINDS...South 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.

Colorado Red Flag Warning | Effective 04/21/2026 04:02

Wind gusts up to 45 to 55 mph and critical fuels will overcome marginal relative humidity values on Wednesday, leading to widespread critical fire weather conditions in Colorado zones 200 and 202. * AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little Snake Forecast Area and Fire Weather Zone 202 White River Forecast Area. * TIMING...From 10 AM to 9 PM MDT Wednesday. * WINDS...Southwest 25 to 35 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...14 to 19 percent.

Colorado, Wyoming Red Flag Warning | Effective 04/21/2026 04:18

* AFFECTED AREA...Fire Weather Zones 214, 215, 216, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251. * TIMING...From 10 AM Wednesday to midnight MDT Wednesday night. * WINDS...Southwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 6 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire. A Red Flag Warning means that critical fire weather conditions

Texas Flood Warning | Effective 04/21/2026 03:55

...The Flood Warning continues for the following rivers in Texas... Cibolo Creek at Sutherland Springs affecting Karnes and Wilson Counties. * WHAT...Minor flooding is forecast. * WHERE...Cibolo Creek at Sutherland Springs. * WHEN...From this morning to late tomorrow morning. * ADDITIONAL DETAILS... - At 5:15 AM CDT Tuesday the stage was 8.6 feet. - Bankfull stage is 17.0 feet. - Forecast...The river is expected to rise above flood stage late this morning to a crest of 24.5 feet late this

Oklahoma, Texas Fire Weather Watch | Effective 04/21/2026 03:24

* WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * TEMPERATURES...In the mid 80s to low 90s. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. * SEVERITY... FUELS (ERC)...70th-89th percentile...4 (out of 5). WEATHER...Critical...3 (out of 5). FIRE ENVIRONMENT...7 (out of 10). A Fire Weather Watch means that the potential for critical fire weather conditions exists. Listen for later forecasts and possible red flag warnings.
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