Numerous strong to severe storms occurred, producing hail up to the size of golf balls and strong winds. Areas of very heavy rain occurred across portions of Custer, Pueblo, Otero, Bent, and Prowers Counties.
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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.
Numerous strong to severe storms occurred, producing hail up to the size of golf balls and strong winds. Areas of very heavy rain occurred across portions of Custer, Pueblo, Otero, Bent, and Prowers Counties. The Junkins burn scar was especially hard hit, with 3 to 6 inches of rain, causing a significant flash flood along North Creek into the Beulah Valley. There were numerous road washouts in western Pueblo 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, 11:03 AM MST, 1 hour 27 minutes earlier.
Area Forecast Discussion National Weather Service Pueblo CO 1203 PM MDT Wed May 10 2017 .SHORT TERM...(Today and tonight) Issued at 416 AM MDT Wed May 10 2017 Currently... closed 500 mb low which has brought the region quite a bit of weather the last couple of days was spinning across east central AZ early this AM. Quite a bit of drier air in the lower levels has moved into the region behind a short wave which moved across the region yesterday evening, and little if any precip was falling at 3 am this morning. Weak southwest sfc flow was currently over the se CO plains. A surface low was in the vicinity of Akron CO. Today through tonight.... Another active day is in store for the region, starting this afternoon and lasting into the nighttime hours. For this morning, the weather will generally be quiet with little in the way of precip. A cool front will move down the plains, and will be located from roughly KCOS to KLIC at 6am. This front will continue southward late this morning and should be located from roughly KGLD to KTAD by noon. As the front moves south, the sfc winds will begin to pick up and veer, becoming northeasterly with time. Showers should start to increase by noontime on the east facing slopes of the s mtns, with showers and storms increasing along the boundary by early to mid afternoon. As the 500 mb low moves E-NE across N NM this afternoon, deep upslope will develop over the plains. The sfc boundary over the Raton Mesa region will sharpen up, and this will be the best location of a couple of severe storms during the afternoon time period. The primary threat will be hail, but given the well defined sfc boundary, an isolated tornado cant be ruled out. Showers and storms will rapidly increase mid to late afternoon, with locally heavy rain expected on the east facing slopes and along the sfc boundary. Given that the Spanish Peaks region has had heavy rain the last couple of days and that flooding has already occurred, a FLASH FLOOD watch has been issued for the Spanish Peaks region. The combination of snow melt, saturated ground and mdt to heavy rain (along with breaking beaver dams), the flood threat will continue across this region. River flooding of the Purgatorie may become an issue late this afternoon into tonight. Expect widespread 1"+ amounts of QPF on east facing slopes of the S mtns and along the boundary extending from roughly KTAD to KLAA. With the upper low moving just south of the fcst area tonight, colder air will move in aloft. This will allow for snow to fall across the higher tops of the mtns adjacent to the plains, and a winter storms warning has been issued for the higher elevations. Well over a foot of snow will be possible. Additional winter hilites may be needed for lower mtn elevations, but will allow the incoming crew to make that decision. \/Hodanish .LONG TERM...(Thursday through Tuesday) Issued at 416 AM MDT Wed May 10 2017 Thursday...The upper low is forecast to be located over the OK and TX Panhandles Thu morning, then will track east across Kansas through the day and reach southern Missouri that night. Areas of moderate rain as well as heavier snowfall for the peaks of the eastern mts will taper off through the morning, and as the system pulls away, pcpn chances will drop off quickly in the aftn as brisk northerly flow on the backside of the low ushers in cooler and less moist air. Max temps are expected to climb only into the upper 50s to mid 60s for most areas. Friday...An upper ridge of high pressure will slide across the state on Fri, ushering in warmer temps and drier conditions. However, there will be enough residual moisture for scattered showers and a few thunderstorms over the mts and high valleys during the aftn and early evening hrs. Temps are forecast to climb into the 70s for most areas. Saturday through Tuesday...As the upper ridge slides east of Colorado, models indicate a longwave trough setting up over the West Coast that will keep the Four Corners and Colorado under southwest flow aloft. There will be a couple of hard-to-time shortwaves in the flow aloft that could enhance convection for the forecast area over the weekend, but for the most part models really want to shift gears and fall into a diurnal mt convection pattern, with isolated showers and thunderstorms developing over the higher terrain each aftn and evening. For now kept pops at isolated levels, and will fine tune each day. Look for high temps in the upper 60s and 70s for the high valleys, and 70s to mid 80s for the eastern plains. Moore && .AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon) Issued at 1159 AM MDT Wed May 10 2017 GOES-16 visible satellite imagery reveals cu and towering cu developing across southern Colorado. These cu will grow into thunderstorms early this afternoon and become widespread, including in the vicinity of KALS, KCOS, and KPUB. Some of the storms 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 early this evening. Gusty northerly winds will continue at KPUB and KCOS this afternoon through the evening. MVFR conditions are expected at all three TAF sites this afternoon into the evening as ceilings drop. IFR to LIFR conditions will be possible at times, especially under strong thunderstorms. && .PUB WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch from 3 PM this afternoon to 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. && SHORT TERM...HODANISH LONG TERM...MOORE AVIATION...LINE
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
1004 AM MDT WED MAY 10 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1004 AM HEAVY RAIN 5 NNE SPANISH PEAKS 37.45N 104.92W
05/10/2017 M2.00 INCH HUERFANO CO TRAINED SPOTTER
24-HR STORM TOTAL.
&&The Pueblo radar (KPUX), 160 km away, was scanning. The volume nearest the first event began at 19:29 UTC.
16 hail, 2 flash flood, 1 funnel cloud. Local standard time, as filed.
A large funnel cloud occurred. Close up eyewitnesses reported they did not see a dust whirl on the ground.
Very heavy rain on the Junkins burn scar caused significant flash flooding along North Creek into the Beulah Valley. North Creek Road and adjoining driveways were washed out. Several residents were stranded on their property, but there were no injuries or loss of life.
Strong storms producing very heavy rain, which caused flash flooding and road washouts between Beulah and the Pueblo Reservoir. Flowing water well over 6 inches deep was widespread, with some standing water reported to be near 3 feet deep.
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: 693454, 686421, 686422, 686423, 686424, 686479, 686445, 686426, 686480, 686427, 686428, 686429, 686430, 686433, 686438, 686434, 686435, 686436, 686440.