灾害 · 赫斯佩鲁斯洪水预报
拉普拉塔河水位上涨,周日晚间赫斯佩鲁斯面临轻微洪水威胁
原语言视频
译自英文原文。
拉普拉塔河畔、位于赫斯佩鲁斯的住宅或房产所有者将面临河水预计于11月1日星期日傍晚升至洪水水位以上的威胁,最高水位预计出现在当晚较晚时段。这项警报指出的是夜间洪水威胁,而非赫斯佩鲁斯已经观测到洪水;预报称河水将在周一清晨降至洪水水位以下。1
位于大章克申的国家气象局预计洪峰将达到5.8英尺,比该地点5.5英尺的洪水水位高出0.3英尺。其评估明确指出:「预计将发生轻微洪水。」赫斯佩鲁斯是指定地点,科罗拉多州拉普拉塔县是受影响县;这一指定并不意味着预报称整个县都会发生洪水。1
警报于2026年10月31日星期六上午9:50(山地夏令时)发布。警报时段将于周日山地标准时间下午3时开始,早于预计傍晚超过洪水水位的时间,并于11月2日星期一上午11时(MST)结束。下午开始与傍晚越过水位阈值,描述的是预报的不同阶段,并非对洪水已经发生时间的相互矛盾说法。1
这一点对河边的人很重要:警报时段在预计水位越过阈值之前就已开始。若等到洪峰有报道后才采取行动,就意味着要等到预报中最关键的时段已经开始。现有信息能够确认危险及预计发生时间,但没有指出某条具体道路、渡口或建筑将被水淹没。
河流水位数字意味着什么
周六上午9:30 MDT,河流水位测得4.1英尺。这是一个有明确时间的观测值,并非实时读数。当时水位比洪水水位低1.4英尺,比警报列出的5.0英尺满岸水位低0.9英尺。1
与周六观测值相比,预计洪峰意味着水位将上升1.7英尺。但无论是这一涨幅,还是高于洪水水位的0.3英尺,都不能告诉居民道路上或建筑旁的积水会有多深。这些数字是河流水位计读数,并非对各处房产洪水深度的测量。1
警报将预计洪峰与2005年5月21日出现的5.8英尺历史洪峰作比较。这是有用的水位高度对比,但仍然只是预报与历史测量值相匹配,并非观测到早先事件重演。1
《Weather Alert Watch》转载的一则内容还写道:「这接近有记录以来的洪水。」不过,现有证据无法独立证实2005年5月的洪峰是有记录以来的最高值,也不足以将此次预报称为新的纪录,或为其赋予历史排名。能够支持的比较仅限于所述水位高度和日期。6
夜间预报与周一的时间节点
预报称,河水将在周日傍晚超过5.5英尺,当晚较晚时段达到最高水位,并于周一清晨降至洪水水位以下。警报安排在周一稍晚更新并到期;这两者都不是证实河水已经退去的测量结果。1
警报及预定时间节点
周末期间,时间标注也发生变化:周六的发布和观测时间采用山地夏令时,而周日和周一的警报时间采用山地标准时。保留这些时区标注,可以避免误移警报开始时间,或将更新时间与到期时间混淆。1
现有证据中没有经过核实的后续水位读数,也没有取代原警报的新警报。证据也未证实赫斯佩鲁斯有特定道路封闭、撤离、救援或房产被水淹的情况。这些是报道所依据的信息范围,并不意味着可以保证不会发生影响。
因此,接下来最重要的事实很明确:河水是否会超过5.5英尺、实际洪峰有多高,以及这轮水位上涨会影响河边的哪些地方。目前能够确定的情况是,当地存在预计于夜间达到峰值的洪水威胁,而非已确认发生洪水。1
来源13
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National Weather Serviceweather.gov3
Air Sports Netusairnet.com1
Defcon Leveldefconlevel.com1
KSUT Public Radioksut.org最先1
nichedb.dev1
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- Flooding · NicheDB
RecallRadarUSArecallradarusa.today1
Storm Station 247stormstation247.com1
The Pagosa Springs Sunpagosasun.com1
播出原貌
- Forecasters expect the La Plata River to rise above flood stage.
- The warning targets Hesperus, where minor flooding is forecast Sunday night into Monday. People and properties beside the river face a predicted crest three-tenths of a foot above the flood threshold.
- What remains unresolved is how high the river actually rises, and what that rise affects.
- Hesperus is the location named in the warning, with La Plata County identified as the affected county. The forecast concerns the La Plata River there. Its reach shouldn't be read as a prediction of flooding across the whole county.
- The National Weather Service in Grand Junction issued the warning Saturday, October 31. It expects the river to cross flood stage Sunday evening, November 1, and reach its highest level late that evening.
- The river measured 4.1 feet Saturday morning. Forecasters expect 5.8 feet late Sunday evening, a rise of 1.7 feet. The measurement describes Saturday's conditions; the higher figure is the predicted crest.
- Flood stage at Hesperus is 5.5 feet. The listed bankfull level is 5.0 feet. Saturday's measurement was 1.4 feet below flood stage and nine-tenths of a foot below bankfull.
- The predicted crest would clear flood stage by three-tenths of a foot. These figures describe the river's gauge level. They don't tell someone how deep water would be on a particular road or beside a building.
- The warning forecasts minor flooding along this river. Its most specific concern is the overnight rise, with water expected above the flood threshold Sunday evening before falling below it early Monday morning.
- A previous crest reached 5.8 feet on May 21, 2005. Sunday's forecast matches that listed height. Forecasters are using that earlier crest as a comparison for the rise they expect this time.
- The warning window starts Sunday afternoon, ahead of the expected evening crossing of flood stage. Its Monday update and Monday expiration are separate events, two hours apart.
- The warning period begins at three Sunday afternoon. The next statement is scheduled for nine Monday morning, and the warning expires at eleven. Those Sunday and Monday times use Mountain Standard Time, after Saturday's daylight-time observation.
- Forecasters expect the river below 5.5 feet early Monday, before the scheduled expiration. The actual crest and any resulting flood impacts at Hesperus still aren't known.
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