Marine Weather and Tide Forecast for Cozad, NE

DISCUSSION
Issued at 101 PM CDT Mon Jun 8 2026

Convection from this morning has left an outflow boundary draped across the area. Meanwhile, elevated convection is already ongoing near LBF and additional cumulus is developing near and along the remnant outflow. Near-term CAMs came into agreement this morning that the primary area of redevelopment will be in western portions of the area (possibly between McCook and Holdrege) in the 3-5pm timeframe. The strongest convection is then expected to push southeastward through the late afternoon and evening along the axis of greatest instability (3000+ J/kg MLCAPE). Deep-layer shear is also quite strong, with effective shear possibly approaching 50kts at times. Given the expected storm mode (multicell clusters merging into line segments), the primary severe threat is wind, although severe hail is also expected in some areas. Output from the CAMs would indicate that thunderstorm wind gusts of 70-80 MPH are possible. A tornado or two cannot be ruled out, although the higher threat appears to be to our east as the QLCS becomes more organized.

In addition to the severe threat, CAMs are indicating that these storms will be very efficient rainfall producers...which isn't surprising with PWAT values near 1.7" per mesoanalysis.
The RRFS and HRRR indicate potential 2"/hr rainfall rates and localized totals of 3-4". As such, a Flood Watch was issued for portions of far southern Nebraska and north central Kansas.

Storms are expected to exit the area by around 10pm, but additional convection from the High Plains may roll in later overnight. Given the timing, these storms should not be as intense, but some strong to severe storms do remain possible into the early morning hours of Tuesday. This is a relatively new trend, so confidence in specifics remains fairly low.

Tuesday is expected to be the warmest day of the year so far in many areas. Aided by a strong southerly wind (gusts 30-40 MPH), high temperatures in the 90s and even low 100s are expected.
Heat index values may briefly approach 105 degrees in eastern zones where dewpoints are higher.

The daytime should remain mostly dry, but scattered thunderstorms are expected to move west to east across the area during the late afternoon and evening hours. Confidence in coverage remains uncertain, but convective parameters (3-4000 J/kg MLCAPE and 30kt 0-6km shear) would be favorable for a least a few severe storms.

Wednesday will trend a bit cooler, and the main threat area for storms will shift to the south/east. That said, a few storms cannot be totally ruled out Wednesday evening into the overnight.

With the active weather in the near-term, not much time was spent on the longer-range forecast. After a break late this week, ensembles bring t-storm chances back to the area over the weekend and into next week. Models also favor a general "cooling" trend this weekend into early next week. Sunday and Monday could be feature highs in the 70s...which is about 10 degrees below normal.

AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/
Issued at 556 PM CDT Mon Jun 8 2026

For KGRI/KEAR Airports:

Early evening thunderstorms are expected to remain south of the KGRI and KEAR terminals, and will be focused near and south of the Kansas-Nebraska state line. Additional showers and storms developing over northeastern Colorado, western Nebraska, and northwestern Kansas are forecast to move generally eastward overnight. There is some uncertainty in how far north and east this activity will track, especially with the primary frontal boundary remaining near the Kansas and Nebraska border after being reinforced by the evening storms in that vicinity. As a result, only a Prob30 is included in the 00Z TAF issuance for KGRI and KEAR for the potential overnight activity, focused in the 05Z to 10Z timeframe. This will be re-evaluated based on upstream trends for later updates.

There is a medium to high chance that low ceilings in stratus develop late tonight and continue through Tuesday morning, and a low chance that visibility reductions in fog occur, too. We have introduced a period of MVFR ceilings Tuesday morning at both KGRI and KEAR to account for this.

Otherwise, VFR conditions will generally prevail outside of any thunderstorms, and after stratus dissipates by about 18Z Tuesday.
Light winds are expected tonight, becoming southerly and increasing Tuesday afternoon. Expect gusts up to 25-30 kt at KGRI and KEAR after 21Z.

GID WATCHES/WARNINGS/ADVISORIES
NE...Flood Watch until 10 PM CDT this evening for NEZ082>085.
KS...Flood Watch until 10 PM CDT this evening for KSZ005>007- 017>019.