SPC – No MDs are in effect as of Mon Apr 21 12:35:01 UTC 2025
No Mesoscale Discussions are in effect as of Mon Apr 21 12:35:01 UTC 2025.
SPC Apr 21, 2025 Day 4-8 Severe Weather Outlook
Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0307 AM CDT Mon Apr 21 2025 Valid 241200Z - 291200Z ...DISCUSSION... ...Day 4/Thu -- Central/Southern Plains... Some severe thunderstorm potential is possible across the southern/central Plains on Day 4/Thu. Similar to the Day 2-3/Tue-Wed period, a low-amplitude, and generally modest deep-layer southwesterly flow regime will persist. Southerly low level flow ahead of a southward sagging front across the central Plains, and to the east of a dryline extending southward across the southern High Plains will sustain advection of Gulf moisture across the region. At least some
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.
Red Flag Warning issued April 20 at 8:58PM MDT until April 21 at 8:00PM MDT by NWS Goodland KS
...Critical fire weather conditions are expected across the area Monday afternoon... .The combination of dry fuels, southwest winds gusting up to 30 mph and low relative humidity will support critical fire weather conditions across the area Monday afternoon. * AFFECTED AREA...Fire Weather Zones 001 Cheyenne, 002 Rawlins, 003 Decatur, 004 Norton, 013 Sherman, 014 Thomas, 015 Sheridan, 016 Graham, 027 Wallace, 028 Logan, 029 Gove, 041 Greeley, 042 Wichita, 079 Dundy, 080 Hitchcock, 081 Red Willow, 252 Yuma, 253 Kit Carson and 254 Cheyenne. * TIMING...From noon MDT /1 PM CDT/ to 8 PM MDT /9 PM CDT/ Monday. *
Flood Warning issued April 20 at 8:18PM CDT by NWS Little Rock AR
...The Flood Warning continues for the following river in Arkansas... White River At Clarendon affecting Arkansas and Monroe Counties. For the Lower White River...including Newport, Augusta, Georgetown, Des Arc, Clarendon...Moderate flooding is forecast. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...White River at Clarendon. * WHEN...Until further notice. * IMPACTS...At 26.0 feet, River flows in many side channels and creates islands between the river and sloughs and creeks. Flooding of cropland and timber is occurring. Portions of the National Wildlife Refuge downstream of Clarendon flooding. At 28.0 feet, Flooding of cropland and timber is occurring. Roads
Flood Warning issued April 20 at 8:14PM CDT by NWS Little Rock AR
...The Flood Warning continues for the following river in Arkansas... Cache River Near Patterson affecting Jackson and Woodruff Counties. For the Cache River...including Patterson...Moderate flooding is forecast. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Cache River near Patterson. * WHEN...Until further notice. * IMPACTS...At 8.0 feet, Low swampy timberland along the river begins to flood. At 9.0 feet, Low swampy timberland along the river begins to flood. Flood gates should be closed and equipment moved out of the low grounds along the river and tributaries. At 10.0 feet, Pastureland and cropland not protected by levees in
Flood Warning issued April 20 at 8:08PM CDT by NWS Little Rock AR
...The Flood Warning continues for the following river in Arkansas... White River At Des Arc affecting Prairie County. For the Lower White River...including Newport, Augusta, Georgetown, Des Arc, Clarendon...Moderate flooding is forecast. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...White River at Des Arc. * WHEN...Until further notice. * IMPACTS...At 21.0 feet, Minor flooding of farmlands within the levees. At 24.0 feet, Many acres of farmland flooded within the levees. Water is backing up Bayou Des Arc and Cypress Bayou. At 27.0 feet, Water is backing up Bayou Des Arc and Cypress Bayou. West Park Drive
Flood Warning issued April 20 at 8:04PM CDT by NWS Little Rock AR
...The Flood Warning continues for the following river in Arkansas... White River At Georgetown affecting Woodruff, White and Prairie Counties. For the Lower White River...including Newport, Augusta, Georgetown, Des Arc, Clarendon...Moderate flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...White River at Georgetown. * WHEN...Until further notice. * IMPACTS...At 21.0 feet, Hurricane Lake Wildlife Management Area and Raft Creek Bottoms inundated. Roads in the bottoms are flooded. At 22.0 feet, Farm fields and farm roads on either side of Highway 36 west of Georgetown inundated. At 23.0 feet, Minor street flooding in Georgetown including