La Plata River rise threatens minor flooding at Hesperus Sunday night

The National Weather Service in Grand Junction expects a crest of 5.8 feet, three-tenths of a foot above the location’s 5.5-foot flood stage. Its assessment is explicit: “Minor flooding is forecast.” Hesperus is the named location, and La Plata County, Colorado, is the affected county; that designation is not a prediction that the whole county will flood.⁠1

The warning was issued Saturday, October 31, 2026, at 9:50 a.m. Mountain Daylight Time. Its warning period begins at 3 p.m. Mountain Standard Time Sunday, ahead of the expected evening crossing of flood stage, and ends at 11 a.m. MST Monday, November 2. The afternoon start and evening crossing describe different parts of the forecast, not competing accounts of when flooding has happened.⁠1

That distinction matters for anyone beside the river: the warning window begins before the predicted threshold crossing. Waiting for a reported crest would mean waiting until the forecast’s most consequential period was already under way. The available information establishes the hazard and its expected timing, but does not identify a particular road, crossing or building that will be inundated.

The river measured 4.1 feet at 9:30 a.m. MDT Saturday. That is a dated observation, not a live reading. At that point, the water was 1.4 feet below flood stage and nine-tenths of a foot below the warning’s listed bankfull level of 5.0 feet.⁠1

The forecast crest would represent a rise of 1.7 feet from that Saturday observation. But neither the rise nor the three-tenths of a foot above flood stage tells a resident how deep water would be on a road or beside a building. These are river-gauge levels, not measurements of floodwater depth at individual properties.⁠1

The warning compares the predicted crest with a previous crest of 5.8 feet on May 21, 2005. That is a useful comparison of heights, but it remains a forecast matching a historical measurement—not an observed repeat of the earlier event.⁠1

A reproduction carried by Weather Alert Watch also includes the wording, “This approaches the flood of record.” The available evidence does not independently establish that the May 2005 crest is the all-time record, however, and does not justify calling the forecast a new record or assigning it a historical rank. The supported comparison is the stated height and date.⁠6

The forecast calls for the river to exceed 5.5 feet Sunday evening, reach its high point late that evening and drop below flood stage early Monday morning. The warning’s scheduled update and expiration come later Monday; neither is a measurement confirming that the river has receded.⁠1

One reproduction could cause confusion about that final morning. The Slope lists 9 a.m. November 2 as the expiration in its alert metadata.⁠3 The NWS bulletin’s encoded warning period instead ends at 11 a.m. MST; 9 a.m. is the separately scheduled next statement. The primary bulletin controls that distinction.⁠2

The time labels also change across the weekend: Saturday’s issuance and observation use Mountain Daylight Time, while the Sunday and Monday warning times use Mountain Standard Time. Keeping those labels attached avoids shifting the warning’s start or confusing the update with its expiration.⁠1

No later gauge reading or superseding warning has been verified in the available evidence. Nor does it establish a Hesperus-specific road closure, evacuation, rescue or property inundation. Those are limits on what can be reported, not assurances that no impacts will occur.

The next consequential facts are therefore straightforward: whether the river crosses 5.5 feet, how high it actually crests and what that rise affects beside the river. For now, the established story is a forecast local flood threat with an overnight peak—not a confirmed flood outcome.⁠1