Alert archive / Colorado / Tornado Warnings in 2015
Tornado Warning 48, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Aug 7, 2015, 5:50 PM MDT for Adams County, Arapahoe County, Washington County, Colorado. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2015, 5:50 PM MDT (23:50 UTC)
- Expired
- Aug 7, 2015, 6:30 PM MDT
- In force
- 40 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
Counties Adams County, CO, Arapahoe County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 66 km from the middle of the area, began a volume at 23:53 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 7, 3:05 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 11.8 hours before the alert went out and 49 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
- 3310 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
528
WFUS55 KBOU 072350
TORBOU
COC001-005-121-080030-
/O.NEW.KBOU.TO.W.0048.150807T2350Z-150808T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
550 PM MDT FRI AUG 7 2015
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN ARAPAHOE COUNTY IN NORTHEASTERN COLORADO...
SOUTHEASTERN ADAMS COUNTY IN NORTHEASTERN COLORADO...
SOUTHWESTERN WASHINGTON COUNTY IN NORTHEASTERN COLORADO...
* UNTIL 630 PM MDT
* AT 549 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED 9 MILES NORTHWEST OF COTTONWOOD VALLEY...OR 34
MILES NORTH OF LIMON...MOVING EAST AT 25 MPH.
HAZARD...TORNADO AND PING PONG BALL SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.
DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE
DAMAGE IS LIKELY.
* LOCATIONS IMPACTED INCLUDE...
LAST CHANCE...COTTONWOOD VALLEY AND WOODLIN SCHOOL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE IN A MOBILE
HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 3961 10391 3979 10405 3994 10356 3970 10345
TIME...MOT...LOC 2349Z 249DEG 20KT 3974 10392
TORNADO...RADAR INDICATED
HAIL...1.50IN
$$
RTGThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 2:54 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 51 min |
| Aug 7, 3:42 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 33 min |
| Aug 7, 4:05 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 25 min |
| Aug 7, 4:17 PM MDT | Areal Flood Advisory | BOU | Morgan | 118 min |
| Aug 7, 4:21 PM MDT | Tornado Warning | BOU | Morgan | 24 min |
| Aug 7, 4:28 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 32 min |
| Aug 7, 4:39 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 51 min |
| Aug 7, 5:14 PM MDT | Tornado Warning | BOU | Morgan | 31 min |
| Aug 7, 5:32 PM MDT | Areal Flood Advisory | BOU | Morgan | 118 min |
| Aug 7, 5:33 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan | 42 min |
| Aug 7, 5:44 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 31 min |
| Aug 7, 5:55 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 50 min |
Nearby
Tornado Warnings in Colorado, 2015Every tornado warning in 2015Tornadoes in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.