Alert archive / Colorado / Tornado Warnings in 2015
Tornado Warning 55, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Aug 16, 2015, 4:11 PM MDT for Weld County, Colorado. It was in force for 34 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 16, 2015, 4:11 PM MDT (22:11 UTC)
- Expired
- Aug 16, 2015, 4:45 PM MDT
- In force
- 34 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 2.0 in
County Weld County, CO
The radar
The Denver radar (KFTG), 67 km from the middle of the area, began a volume at 22:14 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 nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 10.2 hours before the alert went out and 112 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
- 2198 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
765
WFUS55 KBOU 162211
TORBOU
COC123-162245-
/O.NEW.KBOU.TO.W.0055.150816T2211Z-150816T2245Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
411 PM MDT SUN AUG 16 2015
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
SOUTH CENTRAL WELD COUNTY IN NORTHEASTERN COLORADO...
* UNTIL 445 PM MDT
* AT 411 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED 6 MILES SOUTHEAST OF BARNESVILLE...OR 17 MILES
EAST OF GREELEY...MOVING SOUTHEAST AT 15 MPH.
HAZARD...TORNADO AND HAIL UP TO TWO INCHES IN DIAMETER.
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...
KERSEY AND RIVERSIDE RESERVOIR.
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 4038 10456 4052 10442 4047 10427 4040 10418
4030 10422 4018 10439
TIME...MOT...LOC 2211Z 303DEG 15KT 4040 10441
TORNADO...RADAR INDICATED
HAIL...2.00IN
$$
RJK1 follow-up statement
129
WWUS55 KBOU 162233
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
433 PM MDT SUN AUG 16 2015
COC123-162245-
/O.CON.KBOU.TO.W.0055.000000T0000Z-150816T2245Z/
WELD CO-
433 PM MDT SUN AUG 16 2015
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR CENTRAL
WELD COUNTY...
AT 433 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER RIVERSIDE RESERVOIR...OR 24 MILES EAST OF GREELEY...
MOVING SOUTHEAST AT 20 MPH.
HAZARD...TORNADO AND TWO INCH HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
LIKELY.
LOCATIONS IMPACTED INCLUDE...
RIVERSIDE RESERVOIR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4033 10448 4042 10443 4046 10435 4043 10425
4040 10418 4030 10422 4023 10433
TIME...MOT...LOC 2233Z 303DEG 16KT 4033 10429
TORNADO...RADAR INDICATED
HAIL...2.00IN
$$
RJKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 6:28 PM MDT | Special Weather Statement | BOU | Washington | 32 min |
| Aug 15, 6:47 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 28 min |
| Aug 15, 7:16 PM MDT | Special Weather Statement | BOU | Arapahoe | 29 min |
| Aug 15, 7:22 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 24 min |
| Aug 15, 8:26 PM MDT | Areal Flood Advisory | BOU | Washington | 2 hr |
| Aug 15, 8:51 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 24 min |
| Aug 15, 8:59 PM MDT | Special Weather Statement | BOU | Elbert | 31 min |
| Aug 15, 9:09 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 36 min |
| Aug 15, 9:23 PM MDT | Areal Flood Advisory | BOU | Elbert, Lincoln | 2 hr |
| Aug 15, 9:40 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 35 min |
| Aug 15, 10:14 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 43 min |
| Aug 16, 5:42 AM MDT | Flash Flood Watch | BOU | Elbert, Lincoln, Logan, Morgan, Phillips, Sedgwick and 1 more | 15 hr |
| Aug 16, 2:40 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Larimer | 50 min |
| Aug 16, 3:08 PM MDT | Flash Flood Warning | BOU | Larimer | 112 min |
| Aug 16, 3:21 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 24 min |
| Aug 16, 3:49 PM MDT | Tornado Warning | BOU | Weld | 26 min |
| Aug 16, 3:54 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 13 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.