This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...This Afternoon and Tonight Scattered showers and thunderstorms will develop in the mountains this afternoon and push east onto the I-25 Corridor late this afternoon and evening. Brief rain, lightning, and gusty winds up to 40-45 mph can be expected. Large streams and rivers including the Cache la Poudre and South Platte from around Greeley to Sterling will be running high. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorm coverage and intensity is expected to increase again for Thursday and Friday. A couple severe storms will be possible over the plains both days, and a few storms may also produce locally heavy rainfall. A drier and summer like weather pattern is then expected to arrive late this weekend and continue into early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will be not be needed today or tonight.