A storm system produced more than 10 inches of snow on the ridges of the Sangre de Cristo Mountains and Wet Mountains, and lesser amounts on the lower slopes, including 4 inches near Rosita (Custer County) and 8 inches in Cuchara (Huerfano County).
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PUB wrote it up.
A storm system produced more than 10 inches of snow on the ridges of the Sangre de Cristo Mountains and Wet Mountains, and lesser amounts on the lower slopes, including 4 inches near Rosita (Custer County) and 8 inches in Cuchara (Huerfano County).
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pueblo, CO wrote its last area forecast discussion before the first event at May 10, 3:00 PM MST, 3 hours earlier.
Area Forecast Discussion National Weather Service Pueblo CO 400 PM MDT Wed May 10 2017 .SHORT TERM...(This evening through Thursday) Issued at 400 PM MDT Wed May 10 2017 ...Flood, Heavy Rain, Hail Concerns Continue along with Mountain Snows... Large upper low that has been with us for so many days is slowing transitioning east-northeastward. It will continue moving on this path through Friday, ending up over central Oklahoma by 6 pm Thursday. On this path, as high res models indicate, another period of moderate to heavy precipitation is expected over much of the southern Colorado tonight, especially the eastern mountains and plains. A lot of areas along and adjacent to the mountains could see another 1 to 2 inches of rain tonight. This could lead to some flood problems considering streams are swollen from snowmelt and recent consecutive days of precipitation. This evening, still some hail involved, mostly peas but some stones up to 1 inch in diameter. Also heavy rain, hail out on the plains tonight. Currently, parts of southeastern Las Animas and all of Baca County are missing out on the precipitation but this should change overnight as the low and its precipitation shift east. El Paso/Teller Counties all missing out at this time as well. This should change as well as precip gradually drifts northward this evening. However, these 2 counties may end up on the low end of amounts, receiving mostly light to moderate precipitation. The Junkins and Hayden scars will be targets tonight, as well as the older scars along the eastern slopes. The Waldo probably less of a concern with lesser precip rates/amounts expected. The Spanish Peak Region will also be under the water gun tonight, with another 1 possibly up to 2 inches of additional precipitation. Streams are already swollen there. This additional precipitation will only serve to aggravate. Thus, the Flash Flood Watch remains in effect for the Spanish Peaks Region. Streams in Conejos County are still swollen. There is additional rain occurring there now and it will continue for a while this evening before tapering off after midnight. This could aggravate the situation down there as well. All of this precipitation will equate to perhaps 8 to 16 inches of snow along the eastern mountains above 10,000 feet, with lighter amounts below down to about 8000 feet. Winter Storm Warning will remain in effect for these higher elevation areas. For Thursday, upper low begins to pull east of here. Still ongoing precipitation over the eastern slopes and plains early, mainly of the stratiform and less convective nature (therefore, lower precipitation rates) but then winding down quickly in the afternoon. .LONG TERM...(Thursday night through Wednesday) Issued at 400 PM MDT Wed May 10 2017 Will keep discussion relatively brief due to ongoing active conditions. Main longer term meteorological concerns during the longer term are temperatures, pops and winds. Recent Forecast model soundings, PV analysis and longer term computer simulations indicate that a warmer and drier upper ridging pattern will develop over the forecast district from Thursday evening into Friday night...with generally southwesterly upper flow then prevailing over southern Colorado from Saturday into next Wednesday as upper disturbances remain to the north and west of the forecast district during this time-frame. For sensible weather, will depict temperatures running above mid May climatological averages during the longer term with warmest conditions anticipated from the weekend into early next week. In addition, basically low-grade to nil pops are anticipated during the balance of the longer term with the highest potential for stronger gradient winds anticipated from later Monday into Tuesday. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 400 PM MDT Wed May 10 2017 Showers and thunderstorms will continue tonight, including in the vicinity of KALS, KCOS, and KPUB. Some of the storms this evening may be severe, with 1 inch diameter hail, gusty winds, heavy rainfall, and frequent lightning. Thunderstorms will give way to stratiform precip and overcast skies overnight. Improving trend begins after midnight for KALS and tomorrow afternoon for KCOS and KPUB. MVFR conditions are expected at all three TAF sites this evening as ceilings drop. IFR to LIFR conditions will be possible at times, especially under heavier periods of precipitation and stronger thunderstorms. && .PUB WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch until 11 PM MDT this evening for COZ074-087- 088. Winter Storm Warning from 6 PM this evening to noon MDT Thursday for COZ073-075-080-082. &&
Hazardous Weather Outlook National Weather Service Pueblo CO 1121 AM MDT Wed May 10 2017 COZ058>089-093>099-111730- Western Mosquito Range/East Lake County Above 11000 Ft- Leadville Vicinity/Lake County Below 11000 Ft- Eastern Sawatch Mountains above 11000 Ft- Western Chaffee County Between 9000 and 11000 Ft- Central Chaffee County Below 9000 Ft- Western Mosquito Range/East Chaffee County above 9000Ft- Saguache County West of Continental Divide Below 10000 Ft- Saguache County East of Continental Divide below 10000 Ft- La Garita Mountains Above 10000 Ft- Upper Rio Grande Valley/Eastern San Juan Mountains Below 10000 Ft- Eastern San Juan Mountains Above 10000 Ft- Del Norte Vicinity/Northern San Luis Valley Below 8500 Ft- Alamosa Vicinity/Central San Luis Valley Below 8500 Ft- Southern San Luis Valley- Northern Sangre de Cristo Mountains Between 8500 And 11000 Ft- Northern Sangre de Cristo Mountains above 11000 Ft- Southern Sangre de Cristo Mountains Between 7500 and 11000 Ft- Southern Sangre de Cristo Mountains Above 11000 Ft- Northwestern Fremont County Above 8500Ft- Western/Central Fremont County Below 8500 Ft- Wet Mountain Valley Below 8500 Ft- Wet Mountains between 6300 and 10000Ft- Wet Mountains above 10000 Ft- Teller County/Rampart Range above 7500fT/Pike's Peak Between 7500 And 11000 Ft-Pikes Peak above 11000 Ft- Canon City Vicinity/Eastern Fremont County- Northern El Paso County/Monument Ridge/Rampart Range Below 7500 Ft- Colorado Springs Vicinity/Southern El Paso County/Rampart Range Below 7400 Ft-Pueblo Vicinity/Pueblo County Below 6300 Feet- Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Ft- Trinidad Vicinity/Western Las Animas County Below 7500 Ft- Crowley County-La Junta Vicinity/Otero County- Eastern Las Animas County-Western Kiowa County- Eastern Kiowa County-Las Animas Vicinity/Bent County- Lamar Vicinity/Prowers County-Springfield Vicinity/Baca County- 1121 AM MDT Wed May 10 2017 This hazardous weather outlook is for portions of central...east central...south central and southeast Colorado. .DAY ONE...Today and Tonight Moderate to locally heavy rain, with embedded thunderstorms, are expected this afternoon and evening across parts of the plains. The heaviest rain is expected along a line from the greater Spanish Peaks region to Lamar. These rains will be capable of causing flooding, especially in the Spanish Peaks region. A few severe thunderstorms are possible today, mainly in the vicinity of the Colorado and New Mexico border. These storms will develop along a developing boundary over this region. The primary threat will be hail up to the size of half dollars, but given the well defined boundary in the area, an isolated tornado cannot be ruled out. Snow will occur across the southern mountains this evening, and last through the night. Significant accumulations are likely, generally above 10000 feet. As a reminder, one of the primary hazards with any thunderstorm is lightning. If you can hear thunder, you need to move indoors immediately to lower your risk of being struck. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday The upper low pressure system will be exiting the region on Thursday. Periods of moderate rain as well as heavier snowfall for the peaks of the eastern mountains will continue through the morning, then quickly taper off through the afternoon. The main concern will be the continued flooding threat due to already saturated ground coupled with ongoing snowmelt, especially across the Spanish Peaks region as well as area burn scars. High pressure will move across the area on Friday, then park just east of the state for Saturday through Tuesday. Warmer and drier conditions are expected, but there will be enough residual moisture for isolated thunderstorms to develop over the higher terrain each afternoon. Primary concerns will be lightning, small hail and wind gusts up to 50 mph. .SPOTTER INFORMATION STATEMENT... Weather conditions that meet reporting criteria for spotters will be likely this afternoon and evening. 50/50
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
620 PM MDT WED MAY 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0619 PM HAIL WALSH 37.38N 102.28W
05/10/2017 M1.00 INCH BACA CO TRAINED SPOTTER
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
621 PM MDT WED MAY 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0621 PM HAIL 3 N HOLLY 38.10N 102.12W
05/10/2017 M0.88 INCH PROWERS CO PUBLIC
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
627 PM MDT WED MAY 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0626 PM HAIL CAMPO 37.10N 102.58W
05/10/2017 E0.88 INCH BACA CO PUBLIC
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
633 PM MDT WED MAY 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0615 PM HAIL 8 E CAMPO 37.09N 102.43W
05/10/2017 M1.00 INCH BACA CO TRAINED SPOTTER
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
645 PM MDT WED MAY 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0638 PM HAIL HOLLY 38.06N 102.13W
05/10/2017 M1.00 INCH PROWERS CO TRAINED SPOTTER
&&Special Weather Statement
National Weather Service Pueblo CO
648 PM MDT WED MAY 10 2017
COZ096-098-110130-
Lamar Vicinity/Prowers County CO-Eastern Kiowa County CO-
648 PM MDT WED MAY 10 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PROWERS AND
SOUTHEASTERN KIOWA COUNTIES UNTIL 730 PM MDT...
At 648 PM MDT, Doppler radar was tracking a strong thunderstorm near
Hartman, or 10 miles northwest of Coolidge, moving north at 20 mph.
Nickel size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Hartman.
LAT...LON 3803 10222 3832 10243 3840 10210 3814 10204
3807 10204
TIME...MOT...LOC 0048Z 161DEG 19KT 3813 10215
mwThe national radar mosaic for the moment the first event began.
3 winter storm. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2017Every state in 2017This day in weather historyWarnings in Colorado, May 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 699199, 699200, 699201.