textproduct: North Platte

KEY MESSAGES

- Dangerous heat persists across all of western and north central Nebraska through Monday afternoon. Heat index values in excess of 100 degrees each day will increase the threat for heat related illnesses.

- Scattered thunderstorms are possible today and Monday. A few storms could be strong to severe each day, with a threat for damaging wind gusts.

- Periodic chances for showers and thunderstorms will develop Wednesday night through Thursday night as the pattern transitions to northwest flow.

SHORT TERM /THROUGH TUESDAY NIGHT/

Issued at 330 PM CDT Sun Jul 26 2026

Dangerous heat continues across all of western and north central Nebraska this afternoon, with temperatures again climbing into the upper 90s to low 100s. The highest heat index values this afternoon have been observed near and east of Highway 83, where lingering high humidity is pushing heat index values to as high as 110-115F. Further west, a weak frontal boundary bisects the Sandhills. Behind this boundary, drier air has kept heat index values slightly lower, though air temperatures in the 100-105 range are keeping conditions dangerous for heat related illnesses.

The very hot and humid conditions persist through this evening, with limited relief again expected overnight. Lows tonight only fall into the low to middle 70s tonight, leading into yet another hot day Monday. H85 temperatures remain ~30-32C aloft, and though cooler than in previous days, should still promote highs in the upper 90s to near 100F. The slightly cooler highs should also lead to slightly lower heat index values tomorrow, though given the struggle to scour out the deeper moisture yesterday and today, this casts some doubt on how much. See no reason to change the inherited heat advisory headlines for tomorrow, and another dangerously hot day looks to be in store.

The other concern both today and tomorrow will revolve around the threat for strong to severe thunderstorms. For the rest of today, will be monitoring the weak surface front positioned near the HWY 83 corridor for possible convective initiation. With temperatures soaring into the lower 100s near and just ahead of the boundary, believe any lingering CIN should largely be eroded by late afternoon. Increasing convergence along this boundary looks to be enough to lead to at least isolated to widely scattered thunderstorms late this afternoon and into the early evening, mainly near and east of HWY 83. With deep layer shear on the order of ~30- 35kts, at least some updraft organization is expected with storms that form, with a cluster/marginal supercellular storm mode. The main threat will be damaging wind gusts, with storms forming within the well mixed and high DCAPE environment. Any hail threat is much less certain, with very high freezing levels and uncertainty in sustained supercellular storm modes.

Additional thunderstorm development is possible Monday afternoon and evening off the higher terrain to the west, moving into western and southwest Nebraska with time. Again, marginal deep layer shear and a well mixed boundary layer points to threat for damaging wind gusts with the strongest storms.

Some heat relief finally arrives Tuesday, as the warmer temperatures aloft are ushered to the southeast. This will return highs back to the lower 90s, and preclude any heat advisory concerns at this time. Some threat for thunderstorms also looks to persist into Tuesday, though confidence in coverage and timing of these storms remains low for now.

LONG TERM /WEDNESDAY THROUGH SUNDAY/

Issued at 330 PM CDT Sun Jul 26 2026

Wednesday, a strong 594-dam 500-mb upper-level ridge will remain anchored across the southern United States. Southerly low-level flow and warm air advection (WAA) will support temperatures climbing well above normal, with highs in the middle 90s to lower 100s. By late Wednesday afternoon into the evening, a weak shortwave disturbance will move into the region along the northern periphery of the ridge, providing sufficient lift for increasing shower and thunderstorm chances. Current model guidance suggests convection will develop across western Nebraska and the Panhandle before moving east- southeast into the forecast area Wednesday night and into Thursday morning, which is a typical evolution in this pattern. At this time, the severe weather threat appears low as the strongest mid- and upper-level forcing and deep-layer shear remain north of the region. Widespread wetting rainfall is also not expected with this initial round of convection, as storms are forecast to remain scattered. Overnight lows will remain mild, generally in the middle 60s.

Thursday, the upper-level ridge is forecast to strengthen to around 597 dam while shifting into the southwestern United States. This will establish northwest flow aloft across the central Plains, transitioning the region into a classic ring of fire pattern. Weak disturbances moving along the northern periphery of the ridge will continue to provide opportunities for showers and thunderstorms. High temperatures remain somewhat uncertain owing to differences in cloud cover and convective evolution among the guidance, though highs in the lower 90s currently appear reasonable. By Thursday evening, model guidance suggests another round of convection developing across South Dakota before moving southeast into portions of the forecast area. This currently appears to be the best opportunity for more widespread wetting rainfall during the forecast period, though confidence in the exact timing and placement remains low. Forecast trends will continue to be monitored over the next several forecast cycles. Overnight lows Thursday night will once again remain mild, generally in the middle to upper 60s.

Friday through the weekend, northwest flow aloft is expected to persist as the upper-level ridge remains anchored across the southwestern United States. This pattern will allow temperatures to moderate closer to seasonal normals, with afternoon highs generally in the upper 80s to lower 90s. Low precipitation chances will persist as occasional weak disturbances move through the northwest flow, though increasing subsidence beneath the ridge should limit convective coverage. Fire weather concerns are expected to remain low through the period, with minimum relative humidity values generally remaining above 30 percent and synoptic winds staying relatively light. Overall, the pattern favors warm temperatures with periodic, mainly low-end precipitation chances, while the best opportunities for rainfall currently appear to be Wednesday night and again Thursday night.

AVIATION /06Z TAFS THROUGH 06Z TUESDAY/

Issued at 1233 AM CDT Mon Jul 27 2026

VFR conditions are expected to persist over the next 24 hours. Winds will be light and variable overnight, becoming breezy in the morning out of the east northeast around 10 kts with gusts up to 20 kts. There is a chance for isolated thunderstorms in the evening, however at this time confidence in the location of storm development impacting either of the forecast terminal sites remains uncertain.

LBF WATCHES/WARNINGS/ADVISORIES

Heat Advisory until 10 PM CDT /9 PM MDT/ this evening for NEZ004-022>024-035-036-056>058-069-070-094. Extreme Heat Warning until 7 AM CDT this morning for NEZ005>010-025>029-037-038-059-071. Heat Advisory from 7 AM this morning to 10 PM CDT this evening for NEZ005>010-025>029-037-038-059-071.