SPM 06-06-2019: Low Passes to the South Bringing a Flood Threat to Burn Areas over the Southeast Mountains

June 6, 2019 by ·

Issue Date: Thursday, June 6th, 2019
Issue Time: 9:25AM MDT

Summary:

Increased moisture and dynamics over southern Colorado from the passing low brought cooler temperatures and plentiful rainfall to the area. For the most part, the rain was rather gradual and pulse-like in nature, so it didn’t cause too many problems with dew points remaining in the upper 40°Fs. The slow storm movement allowed for some brief, moderate rainfall to occur. Over Colorado Springs, totals up to 1 inch were estimated by radar with CoCoRaHS in the area reporting around 0.5-0.6 inches. Further south over the Raton Ridge, where better dynamics and moisture were present, totals up to 0.75 inches were recorded. The slow storm movement and moderate rainfall did pose a threat to burn areas – particularly the Spring Creek burn area. A Flash Flood was reported near County Road 442 around 2:45PM yesterday. Radar estimates up to 0.5 inches of rain fell over the area, but thankfully no major flood reports. Several areal flood advisories were issued as well along the Front Range and one over the Southeast Plains. However, there were no flooding reports in these areas as of this morning.

The Flood Warning was extended for the San Antonio and Conejos Rivers in southeastern Conejos County through Monday morning. Additional Areal Flood Advisories continued for the Gunnison River above Grand Junction, the La Plata River at Hesperus and for the Mancos River in Montezuma County for minor lowland flooding. These advisories continue until further notice by the NWS. Minor flooding was not reported at any of these locations, though rivers remain at or slightly above bankfull.

To see estimated precipitation totals over your area yesterday, scroll down to the State Precipitation Map below.

Click Here For Map Overview

The map below shows radar-estimated, rainfall gage-adjusted Quantitative Precipitation Estimates (QPE) across Colorado. The map is updated daily during the operational season (May 1 – Sep 30) by 11AM. The following six layers are currently available: 24-hour, 48-hour and 72-hour total precipitation, as well as maximum 1-hour, 2-hour and 6-hour precipitation over the past 24 hour period (to estimate where flash flooding may have occurred). The 24-hour, 48-hour and 72-hour total precipitation contain bias corrections that are not disaggregated into the hourly estimates, so there will likely be some differences. The accumulation ending time is 7AM of the date shown in the bottom right corner. Also shown optionally are vulnerable fire burn areas (post 2012), which are updated throughout the season to include new, vulnerable burn areas. The home button in the top left corner resets the map to the original zoom.
Filed Under: State Precipitation Map ·

SPM 06-05-2019: Rivers Continue to Rise with Afternoon Storms Firing Over the Mountains

June 5, 2019 by ·

Issue Date: Wednesday, June 5th, 2019
Issue Time: 9:30AM MDT

Summary:

Similar setup occurred to the previous couple of days. Storms fired over the high terrains by early afternoon favoring the Front Range and Southeast Mountains for accumulation. Weak thunderstorms with small hail occurred over western Colorado with more intermittent coverage due to lower moisture. Isolated totals up to 0.25 were reported with most areas receiving under 0.1 inches of rainfall. A severe thunderstorms storm over the Palmer Ridge/Southeast Plains intersect in Lincoln County produced 1.25 inch and 0.6 inches of rainfall near Punkin Center. The Ellicott airport reported a gust of 25 mph with this storm. No flooding was reported as totals remained under 1 inch.

An Areal Flood Advisory continued for the Mancos River in Montezuma County for minor lowland flooding. A Flood Warning was issued for the San Antonio and Conejos Rivers in southeastern Conejos County through Thursday morning. Additional Areal Flood Advisories were issued for the Gunnison River above Grand Junction and the La Plata River at Hesperus. Minor flooding was not reported at any of these locations, though rivers remain at or slightly above bankfull.

To see estimated precipitation totals over your area yesterday, scroll down to the State Precipitation Map below.

Click Here For Map Overview

The map below shows radar-estimated, rainfall gage-adjusted Quantitative Precipitation Estimates (QPE) across Colorado. The map is updated daily during the operational season (May 1 – Sep 30) by 11AM. The following six layers are currently available: 24-hour, 48-hour and 72-hour total precipitation, as well as maximum 1-hour, 2-hour and 6-hour precipitation over the past 24 hour period (to estimate where flash flooding may have occurred). The 24-hour, 48-hour and 72-hour total precipitation contain bias corrections that are not disaggregated into the hourly estimates, so there will likely be some differences. The accumulation ending time is 7AM of the date shown in the bottom right corner. Also shown optionally are vulnerable fire burn areas (post 2012), which are updated throughout the season to include new, vulnerable burn areas. The home button in the top left corner resets the map to the original zoom.
Filed Under: State Precipitation Map ·

SPM 06-04-2019: Afternoon Convection for the Mountains and Eastern Plains

June 4, 2019 by ·

Issue Date: Tuesday, June 4th, 2019
Issue Time: 9:10AM MDT

Summary:

Another afternoon of thunderstorms fired over the high terrains and Palmer/Raton Ridges yesterday as a ridge built over the state. Low level moisture dropped off from Sunday, so the threat for heavy rainfall decreased. By early afternoon, some decent Severe Thunderstorms formed over the eastern plains. A landspout was reported in Logan County with another funnel reported in Cheyenne County. A gust of 68 mph was measured with the storm that produced the funnel. 24-hour totals were measured at 0.75 inches with max 1-hour rain rates up to 1.2 inches. Another thunderstorm formed over Colorado Springs and produced 1 inch hail. Maximum totals in the area were estimated at 0.5 inches. Over the mountains the stronger storms produced isolated rainfall totals of 0.5 inches favoring the Front Range for accumulation. Weak thunderstorms over Hotchkiss and Montrose, CO produce 0.25 inch hail and precipitation totals of 0.15 inches.

An Areal Flood Advisory was issued for the Mancos River in Montezuma County again for minor lowland flooding. A Flood Warning was issued for the San Antonio and Conejos Rivers in southeastern Conejos County through Thursday morning. The flow was reported as slightly above bankfull, so minor lowland flooding may have occurred though the gage has not reached above the Action stage yet. Flooding was not reported as of this morning from Monday.

To see estimated precipitation totals over your area yesterday, scroll down to the State Precipitation Map below.

Click Here For Map Overview

The map below shows radar-estimated, rainfall gage-adjusted Quantitative Precipitation Estimates (QPE) across Colorado. The map is updated daily during the operational season (May 1 – Sep 30) by 11AM. The following six layers are currently available: 24-hour, 48-hour and 72-hour total precipitation, as well as maximum 1-hour, 2-hour and 6-hour precipitation over the past 24 hour period (to estimate where flash flooding may have occurred). The 24-hour, 48-hour and 72-hour total precipitation contain bias corrections that are not disaggregated into the hourly estimates, so there will likely be some differences. The accumulation ending time is 7AM of the date shown in the bottom right corner. Also shown optionally are vulnerable fire burn areas (post 2012), which are updated throughout the season to include new, vulnerable burn areas. The home button in the top left corner resets the map to the original zoom.
Filed Under: State Precipitation Map ·

SPM 06-03-2019: River Gages Continue to Rise with another Round of Severe Thunderstorms for the Eastern Plains

June 3, 2019 by ·

Issue Date: Monday, June 3rd, 2019
Issue Time: 9:10AM MDT

Summary:

Similar large-scale pattern for Sunday with a slight uptick in moisture. The upper level low continued to spin over southern CA/NV with a thermal ridge over the state. A weak shortwave helped spark more widespread rainfall and a couple severe thunderstorms over the eastern plains. Totals over the Southeast Plains were up to 2 inches with more general values in the 0.8 to 1.25 inch range. Hail in Elbert County was measured at 0.75 inches and a brief tornado associated with a gust front occurred near Burlington. Grand Junction and Gateway, Colorado also reported small hail with a thunderstorm in the area. Radar indicates just under 0.1 inches of rain falling with these storms.

Two areal flood advisories were issued for rising rivers. The first was for the Mancos River near Mancos in Montezuma County. The flow was slightly above bankfull, so minor lowland flooding may have occurred though the gage never reached above the Action stage. The second areal flood advisory was issued for the San Antonio and Conejos Rivers in southeastern Conejos County. Flooding was not reported as of this morning, but the advisory will likely be renewed throughout the week.

To see estimated precipitation totals over your area yesterday, scroll down to the State Precipitation Map below.

Click Here For Map Overview

The map below shows radar-estimated, rainfall gage-adjusted Quantitative Precipitation Estimates (QPE) across Colorado. The map is updated daily during the operational season (May 1 – Sep 30) by 11AM. The following six layers are currently available: 24-hour, 48-hour and 72-hour total precipitation, as well as maximum 1-hour, 2-hour and 6-hour precipitation over the past 24 hour period (to estimate where flash flooding may have occurred). The 24-hour, 48-hour and 72-hour total precipitation contain bias corrections that are not disaggregated into the hourly estimates, so there will likely be some differences. The accumulation ending time is 7AM of the date shown in the bottom right corner. Also shown optionally are vulnerable fire burn areas (post 2012), which are updated throughout the season to include new, vulnerable burn areas. The home button in the top left corner resets the map to the original zoom.
Filed Under: State Precipitation Map ·
« Previous Page
Next Page »