Tornado Warning 57, NWS Denver/Boulder, CO

Issued

Aug 17, 2015, 3:18 PM MDT (21:18 UTC)

Expired

Aug 17, 2015, 3:45 PM MDT

In force

27 min

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Tornado

Radar indicated

Hail

1.5 in

Counties Douglas County, CO, Jefferson County, CO

The Denver radar (KFTG), 84 km from the middle of the area, began a volume at 21:20 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.

333 
WFUS55 KBOU 172118
TORBOU
COC035-059-172145-
/O.NEW.KBOU.TO.W.0057.150817T2118Z-150817T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
318 PM MDT MON AUG 17 2015

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN DOUGLAS COUNTY IN NORTHEASTERN COLORADO...
  SOUTHERN JEFFERSON COUNTY IN NORTHEASTERN COLORADO...

* UNTIL 345 PM MDT
    
* AT 318 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 4 MILES EAST OF WELLINGTON LAKE...OR 33 MILES
  SOUTHWEST OF DENVER...MOVING SOUTHEAST 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...
  ROXBOROUGH PARK...DECKERS...CHEESMAN RESERVOIR...SPRUCEWOOD...SOUTH
  PLATTE...WELLINGTON LAKE...DEVILS HEAD...BUFFALO CREEK AND PINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING ISSUED
FOR THE SAME AREA.

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 3916 10539 3945 10539 3944 10506 3915 10506
TIME...MOT...LOC 2118Z 305DEG 20KT 3931 10527 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

RPK

385 
WWUS55 KBOU 172128
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
328 PM MDT MON AUG 17 2015

COC035-059-172145-
/O.CON.KBOU.TO.W.0057.000000T0000Z-150817T2145Z/
DOUGLAS CO-JEFFERSON CO-
328 PM MDT MON AUG 17 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM MDT FOR
SOUTHWESTERN DOUGLAS AND SOUTHERN JEFFERSON COUNTIES...
    
AT 327 PM MDT...A CONFIRMED TORNADO WAS LOCATED NEAR DECKERS...OR 33
MILES SOUTHWEST OF DENVER...MOVING SOUTHEAST AT 25 MPH.

HAZARD...DAMAGING TORNADO AND PING PONG BALL SIZE HAIL. 

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO. 

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...
ROXBOROUGH PARK...DECKERS...CHEESMAN RESERVOIR...SPRUCEWOOD...SOUTH
PLATTE...WELLINGTON LAKE...DEVILS HEAD...BUFFALO CREEK AND PINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 3916 10539 3945 10539 3944 10506 3915 10506
TIME...MOT...LOC 2127Z 305DEG 20KT 3928 10521 

TORNADO...OBSERVED
HAIL...1.50IN

$$

RPK

Tornado Warnings in Colorado, 2015Every tornado warning in 2015Tornadoes in 2015

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.