Alert archive / Colorado / Tornado Warnings in 2015
Tornado Warning 15, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at May 15, 2015, 2:32 PM MDT for Morgan County, Weld County, Colorado. It was in force for 43 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
- May 15, 2015, 2:32 PM MDT (20:32 UTC)
- Expired
- May 15, 2015, 3:15 PM MDT
- In force
- 43 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Morgan County, CO, Weld County, CO
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 15, 12:58 PM MDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 8.5 hours before the alert went out and 86 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
- 15 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 1417 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
946 WFUS55 KBOU 152032 TORBOU COC087-123-152115- /O.NEW.KBOU.TO.W.0015.150515T2032Z-150515T2115Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 232 PM MDT FRI MAY 15 2015 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN MORGAN COUNTY IN NORTHEASTERN COLORADO... NORTHEASTERN WELD COUNTY IN NORTHEASTERN COLORADO... * UNTIL 315 PM MDT * AT 231 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO WAS LOCATED 5 MILES NORTHEAST OF WELDONA...OR 12 MILES NORTHWEST OF FORT MORGAN...MOVING NORTH AT 25 MPH. SPOTTERS TO THE NORTH OF FORT MORGAN HAVE REPORTED FUNNEL CLOUDS WITH THIS THUNDERSTORM. HAZARD...TORNADO AND QUARTER SIZE HAIL. SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD. IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. * LOCATIONS IMPACTED INCLUDE... NEW RAYMER...STONEHAM...ANTELOPE SPRINGS...JACKSON RESERVOIR AND WELDONA. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. IF YOU CANNOT SAFELY DRIVE AWAY FROM THE TORNADO...AS A LAST RESORT...EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN IN A LOW LYING AREA AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4031 10371 4036 10408 4078 10394 4075 10360 TIME...MOT...LOC 2031Z 200DEG 23KT 4042 10391 TORNADO...RADAR INDICATED HAIL...1.00IN $$ DANKERS
2 follow-up statements
126
WWUS55 KBOU 152054
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
254 PM MDT FRI MAY 15 2015
COC087-123-152115-
/O.CON.KBOU.TO.W.0015.000000T0000Z-150515T2115Z/
MORGAN CO-WELD CO-
254 PM MDT FRI MAY 15 2015
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM MDT FOR NORTH
CENTRAL MORGAN AND NORTHEASTERN WELD COUNTIES...
AT 251 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 4 MILES SOUTH OF NEW RAYMER...OR 19 MILES NORTH OF FORT
MORGAN...MOVING NORTH AT 20 MPH. SPOTTERS HAVE REPORTED PERIODIC
FUNNEL CLOUD ACTIVITY WITH THIS STORM. THE STORM IS ALSO PRODUCING
HEAVY RAIN WHICH MAY BLOCK THE VIEW OF ANY TORNADIC ACTIVITY.
HAZARD...TORNADO AND QUARTER SIZE HAIL.
SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD ACTIVITY.
IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.
LOCATIONS IMPACTED INCLUDE...
STONEHAM AND NEW RAYMER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. IF YOU
CANNOT SAFELY DRIVE AWAY FROM THE TORNADO...AS A LAST RESORT...EITHER
PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN
IN A LOW LYING AREA AND PROTECT YOURSELF FROM FLYING DEBRIS.
HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
&&
LAT...LON 4048 10367 4047 10404 4078 10394 4075 10360
TIME...MOT...LOC 2051Z 200DEG 23KT 4054 10385
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
DANKERS429
WWUS55 KBOU 152112
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
312 PM MDT FRI MAY 15 2015
COC087-123-152121-
/O.EXP.KBOU.TO.W.0015.000000T0000Z-150515T2115Z/
MORGAN CO-WELD CO-
312 PM MDT FRI MAY 15 2015
...THE TORNADO WARNING FOR NORTH CENTRAL MORGAN AND NORTHEASTERN WELD
COUNTIES WILL EXPIRE AT 315 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER SMALL HAIL
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTHEASTERN
COLORADO.
LAT...LON 4048 10367 4047 10404 4078 10394 4075 10360
TIME...MOT...LOC 2107Z 200DEG 23KT 4054 10385
$$
DANKERSThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 8:11 PM MDT | Special Weather Statement | BOU | Douglas | 34 min |
| May 14, 8:36 PM MDT | Special Weather Statement | BOU | Denver | 24 min |
| May 14, 11:21 PM MDT | Special Weather Statement | BOU | Morgan | 39 min |
| May 15, 12:49 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Douglas | 41 min |
| May 15, 1:21 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 27 min |
| May 15, 1:35 PM MDT | Tornado Warning | BOU | Adams | 25 min |
| May 15, 1:47 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 28 min |
| May 15, 1:48 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 27 min |
| May 15, 1:58 PM MDT | Tornado Warning | BOU | Adams, Morgan, Weld | 37 min |
| May 15, 2:10 PM MDT | Tornado Warning | BOU | Weld | 50 min |
| May 15, 2:47 PM MDT | Tornado Warning | BOU | Weld | 43 min |
| May 15, 5:27 PM MDT | Special Weather Statement | BOU | Morgan | 48 min |
| May 15, 5:46 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan | 29 min |
| May 15, 5:50 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 25 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.