* WHAT…Visibility less than one mile in freezing fog.
* WHERE…Arco/Mud Lake Desert and Upper Snake River Plain.
* WHEN…Until noon MST today.
* IMPACTS…Low visibility could make driving conditions hazardous.
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Red Flag Warning issued April 21 at 4:01AM MDT until April 21 at 7:00PM MDT by NWS Denver CO
* AFFECTED AREA...Fire Weather Zones 242, 244, 246, 247, 248, 249, 250 and 251. * TIMING...From noon today to 7 PM MDT this evening. * WINDS...Southwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 11 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.
Frost Advisory issued April 21 at 3:03AM PDT until April 21 at 8:00AM PDT by NWS Eureka CA
* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Trinity County. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Freeze Warning issued April 21 at 1:56AM MDT until April 21 at 9:00AM MDT by NWS Grand Junction CO
* WHAT...Sub-freezing temperatures as low as 25 expected. * WHERE...Animas River Basin and Four Corners/Upper Dolores River. * WHEN...Until 9 AM MDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.