A line of strong/severe storms tracked across eastern Elbert and Lincoln Counties during the early evening of June 30th producing hail up to one inch in diameter and 60 mph wind gusts.
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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 BOU wrote it up.
A line of strong/severe storms tracked across eastern Elbert and Lincoln Counties during the early evening of June 30th producing hail up to one inch in diameter and 60 mph wind gusts.
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 Denver/Boulder, CO wrote its last area forecast discussion before the first event at Jun 30, 2:15 PM MST, 3 hours 1 minute earlier. Its key messages:
Area Forecast Discussion National Weather Service Denver/Boulder CO 315 PM MDT Sun Jun 30 2024 .KEY MESSAGES... - Warmer today, with scattered afternoon storms. A few could be strong to severe. - Scattered showers and thunderstorms expected Monday. - Downward trend in showers and storms beyond Wednesday. && .SHORT TERM /Through Monday/... Issued at 315 PM MDT Sun Jun 30 2024 Radar shows showers and thunderstorms continuing to develop over the higher terrain this afternoon. A few cells are starting to develop over the Palmer Divide as well. We are just a degree or two off from reaching the convective temperature in the Denver metro according to an ACARS sounding; however, instability is marginal(< 600 J/kg MLCAPE). MLCAPE values (SPC mesoanalysis) show higher values 500- 1000 J/kg over the plains. Dewpoints haven't lowered too much from mixing this afternoon which has kept surface moisture intact. This will support the showers/storms as they move east off the higher terrain. For the remainder of the afternoon and evening, expect a few rounds of scattered showers and thunderstorms. With regard to strong/severe potential, it is a marginal environment, but sufficient to support a few strong to severe storms and localized heavy rainfall and gusts. There's a boundary set up along the Denver Cyclone through Elbert/Arapahoe counties which will warrant watching for storm initiation or weak spin ups. Tonight, a few high-res models show potential for another batch of shower/storms to move through late tonight. Given the lacking agreement, this will be a low chance. Showers push back across the high country around sunrise Monday. Monday, an upper level jet positions to the north of the region bringing weak ascent and better shear. However, instability is fairly marginal (< 600 J/kg CAPE). This will support scattered showers and storms with a couple stronger storms possible. With the plume of above normal moisture nudging into the high country, there is a minor threat flooding impacts on the burn areas. Enhanced flow should keep them moving; however, training storms could cause localized impacts from brief heavy rainfall. High temperatures will likely be in the mid 80s to low 90s for the lower elevations. && .LONG TERM /Monday night through Sunday/... Issued at 238 PM MDT Sun Jun 30 2024 Monday night, upper level high pressure will be over the Southern Plains States with an upper level trough over the Central and Northern Rockies. This pattern should push the plume of subtropical moisture to the south and east of the forecast area resulting in mostly dry conditions east of the mountains. The exception may be across far Southern Lincoln County where brief heavy rain may be possible due to lingering high PWAT's. Precipitation chances may be higher across the high country due to a westerly orographic flow and lift from a passing shortwave. Some of these showers and storms could spread onto the adjacent plains, mainly north of Denver. However, with the lack of moisture and downsloping flow, only light rain and gusty winds are expected. Colorado will be under the influence of a quasi-zonal flow aloft Tuesday and Wednesday which will allow drier air to move into the region from the west. Therefore, mostly dry conditions are expected with possibly a few high based showers and storms with light rain and gusty winds. On Wednesday, models are showing a return of low level moisture on the plains with an upper level disturbance moving across Colorado from the west. As a result, can't rule out one or two strong to severe storms across the plains east of Denver during the afternoon. On July 4th, a very dry airmass will move into Colorado from the west in response to a potent shortwave moving across the Northern Plains States. Consequently, dry weather and clear skies are expected through the day. Temperatures shouldn't be too hot with readings only climbing into the mid and upper 80s across Northeastern Colorado. The warm temperatures combined with low relative humidity and gusty northwesterly winds may lead to fire weather concerns across the the mountains, foothills and adjacent plains during the afternoon and early evening. Cooler temperatures (upper 70s to low 80s on the plains) along with a slightly better chance (10% to 25%) for precipitation are expected on Friday behind the passage of a cold front. For next weekend, near normal temperatures along with mostly dry conditions are expected to continue as a dry westerly flow aloft remains over the region. && .AVIATION /18Z TAFS through 18Z Monday/... Issued at 1209 PM MDT Sun Jun 30 2024 VFR conditions expected through the TAF period. Light and variable winds transition to the ENE this afternoon. Scattered showers and thunderstorms develop this afternoon over the higher elevations then moving east toward the terminals later in the afternoon. This will more likely happen after 22Z for the terminals and closer to 23/00Z for DEN. Can't rule out the low chance for a stray weak shower/storm near the terminals before that. There is a low chance (< 20%) for an additional batch of showers and storms to push through tonight (after 03Z) with a few weak lingering showers after 07Z. Southerly drainage flow establishes by 10Z. Monday, winds transition to the WNW by the afternoon with scattered showers and thunderstorms mainly after 20Z. A few stray showers could be around before that. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && SHORT TERM...Mensch LONG TERM...JK AVIATION...Mensch
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1028 AM MDT Sun Jun 30 2024 COZ030>051-011630- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 1028 AM MDT Sun Jun 30 2024 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered afternoon showers and thunderstorms are expected today. A few storms could become strong to severe, with large hail and gusty winds possible. Temperatures will be warmer across the I-25 corridor with highs returning to the low to mid 90s. .DAYS TWO THROUGH SEVEN...Monday through Saturday Isolated to scattered showers and storms are expected Monday afternoon, mainly across the high country and Palmer Divide. The stronger storms could produce brief heavy rain and small hail. The activity is expected to decrease east of the mountains Monday evening, but may continue across the high country. Drier conditions are expected Tuesday through Saturday with only a few high based showers and storms with gusty winds and light rainfall expected. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight.
Special Weather Statement
National Weather Service Denver CO
416 PM MDT Sun Jun 30 2024
COZ041-302245-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
416 PM MDT Sun Jun 30 2024
...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL DOUGLAS AND
NORTHWESTERN ELBERT COUNTIES THROUGH 445 PM MDT...
At 414 PM MDT, Doppler radar was tracking a strong thunderstorm 4
miles south of Franktown, or 29 miles south of Denver, moving
northeast at 20 mph.
HAZARD...Wind gusts up to 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Castle Rock, Castlewood Canyon, eastern Parker, Elizabeth, Kiowa,
Ponderosa Park, The Pinery, and Franktown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3920 10477 3934 10491 3957 10463 3940 10434
TIME...MOT...LOC 2214Z 233DEG 16KT 3932 10477
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
SCHLATTERSpecial Weather Statement
National Weather Service Denver CO
453 PM MDT Sun Jun 30 2024
COZ041-302345-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
453 PM MDT Sun Jun 30 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN DOUGLAS AND
NORTHWESTERN ELBERT COUNTIES THROUGH 545 PM MDT...
At 452 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Greenland, or 25 miles north of Colorado Springs,
moving east at 15 mph.
HAZARD...Wind gusts up to 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Southern Castle Rock, Elbert, Elizabeth, Kiowa, Ponderosa Park, and
Greenland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3932 10486 3949 10449 3919 10430 3913 10474
3913 10485
TIME...MOT...LOC 2252Z 251DEG 15KT 3923 10470
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
SCHLATTERSpecial Weather Statement
National Weather Service Denver CO
543 PM MDT Sun Jun 30 2024
COZ041-046-010030-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County CO-
543 PM MDT Sun Jun 30 2024
...STRONG THUNDERSTORMS WILL IMPACT NORTHERN ELBERT COUNTY THROUGH
630 PM MDT...
At 542 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles west of Agate to 4 miles southwest of
Elbert, or along a line extending from 25 miles northwest of Limon to
22 miles northeast of Colorado Springs. Movement was southeast at 20
mph.
HAZARD...Wind gusts up to 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Elbert, Kiowa, and Agate.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3929 10465 3957 10433 3957 10377 3929 10402
3913 10428 3913 10467
TIME...MOT...LOC 2342Z 296DEG 17KT 3948 10409 3916 10458
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
SCHLATTERThe Denver radar (KFTG), 81 km away, was scanning. The volume nearest the first event began at 00:15 UTC.
2 thunderstorm wind, 2 hail. Local standard time, as filed.
The wind gusts occurred at mesonet station CO066, Cedar Point.
The hail covered the ground.
The wind gusts occurred at the ASOS station KLIC, Limon.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2024Every state in 2024This day in weather historyWarnings in Colorado, June 2024
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: 1178759, 1178758, 1178760, 1178761.