Alert archive / Colorado / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 8, 2017, 2:25 PM MDT for Clear Creek County, Jefferson County, Colorado. It was in force for 21 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 8, 2017, 2:25 PM MDT (20:25 UTC)
- Expired
- May 8, 2017, 2:46 PM MDT
- In force
- 21 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clear Creek County, CO, Jefferson County, CO
The radar
The Denver radar (KFTG), 63 km from the middle of the area, began a volume at 20:24 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 8, 2:30 PM MDT | HAIL 1 | 3 Nw Idledale, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 8, 12:35 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 8.4 hours before the alert went out and 175 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2189 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
642
WUUS55 KBOU 082025
SVRBOU
COC019-059-082115-
/O.NEW.KBOU.SV.W.0002.170508T2025Z-170508T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
225 PM MDT MON MAY 8 2017
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
Southeastern Clear Creek County in central Colorado...
Northern Jefferson County in central Colorado...
* Until 315 PM MDT
* At 224 PM MDT, a severe thunderstorm was located near Evergreen, or
22 miles southwest of Denver, moving northeast at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Southern Lakewood, southwestern Golden, Evergreen, Morrison,
Idledale, Conifer, Tiny Town, Kittredge, Red Rocks Park, Indian
Hills, Brookvale, Bergen Park and Aspen Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3951 10540 3956 10540 3957 10544 3964 10548
3978 10535 3964 10507 3964 10508 3963 10511
3963 10508 3962 10507 3962 10509 3961 10509
3947 10538
TIME...MOT...LOC 2024Z 244DEG 5KT 3959 10535
HAIL...1.00IN
WIND...60MPH
$$
BOWEN1 follow-up statement
076
WWUS55 KBOU 082046
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
246 PM MDT MON MAY 8 2017
COC019-059-082056-
/O.CAN.KBOU.SV.W.0002.000000T0000Z-170508T2115Z/
Clear Creek CO-Jefferson CO-
246 PM MDT MON MAY 8 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLEAR CREEK AND
NORTHERN JEFFERSON COUNTIES IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.
A severe thunderstorm watch remains in effect until 800 PM MDT for
central and northeastern Colorado.
LAT...LON 3951 10540 3956 10540 3957 10544 3964 10548
3978 10535 3964 10507 3964 10508 3963 10511
3963 10508 3962 10507 3962 10509 3961 10509
3947 10538
TIME...MOT...LOC 2043Z 244DEG 5KT 3960 10531
$$
BOWENThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 2:37 PM MDT | Special Weather Statement | BOU | Elbert | 38 min |
| May 8, 2:44 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 46 min |
| May 8, 2:45 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Boulder, Broomfield, Denver, Jefferson | 45 min |
| May 8, 2:50 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 28 min |
| May 8, 3:21 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Broomfield, Denver, Jefferson | 39 min |
| May 8, 3:25 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Elbert | 50 min |
| May 8, 3:33 PM MDT | Areal Flood Advisory | BOU | Adams, Arapahoe, Denver, Jefferson | 57 min |
| May 8, 3:34 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln, Washington | 41 min |
| May 8, 3:51 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 39 min |
| May 8, 4:15 PM MDT | Areal Flood Advisory | BOU | Weld | 90 min |
| May 8, 4:18 PM MDT | Special Weather Statement | BOU | Adams | 42 min |
| May 8, 4:23 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 37 min |
| May 8, 4:28 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 47 min |
| May 8, 4:46 PM MDT | Areal Flood Advisory | BOU | Adams | 89 min |
| May 8, 4:59 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 25 min |
| May 8, 5:00 PM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| May 8, 5:20 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln, Washington | 40 min |
| May 8, 5:38 PM MDT | Areal Flood Advisory | BOU | Elbert, Lincoln, Washington | 112 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.