Alert archive / Colorado / Tornado Warnings in 2015

Tornado Warning 30, NWS Denver/Boulder, CO

June 4, 2015Elbert County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 4, 2015, 7:30 PM MDT for Elbert County, Colorado. It was in force for 30 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: Jun 4, 2015, 7:30 PM MDT (01:30 UTC)
Expired: Jun 4, 2015, 8:00 PM MDT
In force: 30 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Elbert County, CO

The radar

The Pueblo radar (KPUX), 59 km from the middle of the area, began a volume at 01:31 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
Jun 4, 2:20 PM MDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 1.5 hours before the alert went out and 119 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 945 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 2145 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

263 
WFUS55 KBOU 050130
TORBOU
COC039-050200-
/O.NEW.KBOU.TO.W.0030.150605T0130Z-150605T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
730 PM MDT THU JUN 4 2015

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN ELBERT COUNTY IN EAST CENTRAL COLORADO...

* UNTIL 800 PM MDT
    
* AT 729 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR KUTCH...OR 25 MILES SOUTHWEST OF LIMON...
  MOVING SOUTH AT 10 MPH.

  HAZARD...TORNADO AND HALF DOLLAR 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...
  KUTCH.

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.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

&&

LAT...LON 3899 10403 3899 10374 3887 10373 3887 10403
TIME...MOT...LOC 0129Z 358DEG 8KT 3893 10388 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

RPK

1 follow-up statement

079 
WWUS55 KBOU 050154
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
754 PM MDT THU JUN 4 2015

COC039-050204-
/O.EXP.KBOU.TO.W.0030.000000T0000Z-150605T0200Z/
ELBERT CO-
754 PM MDT THU JUN 4 2015

...THE TORNADO WARNING FOR SOUTHEASTERN ELBERT COUNTY WILL EXPIRE AT
800 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR EAST CENTRAL
COLORADO.

LAT...LON 3899 10403 3899 10374 3887 10373 3887 10403
TIME...MOT...LOC 0152Z 358DEG 8KT 3893 10388 

$$

RPK

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 6:11 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Larimer, Weld	34 min
Jun 4, 6:26 PM MDT	Tornado Warning Tornado observed	BOU	Elbert	34 min
Jun 4, 6:32 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	28 min
Jun 4, 6:37 PM MDT	Tornado Warning Tornado observed	BOU	Boulder	23 min
Jun 4, 6:38 PM MDT	Tornado Warning Tornado observed	BOU	Boulder, Larimer, Weld	22 min
Jun 4, 6:58 PM MDT	Tornado Warning	BOU	Elbert, Lincoln	32 min
Jun 4, 7:03 PM MDT	Tornado Warning Tornado observed	BOU	Boulder, Larimer	27 min
Jun 4, 7:15 PM MDT	Flash Flood Warning Emergency	BOU	Boulder, Larimer, Weld	3 hr
Jun 4, 7:54 PM MDT	Severe Thunderstorm Warning	BOU	Boulder	51 min
Jun 4, 8:40 PM MDT	River Flood Advisory	BOU	Boulder	6 hr
Jun 4, 8:49 PM MDT	Severe Thunderstorm Warning	BOU	Boulder	26 min
Jun 4, 9:13 PM MDT	Areal Flood Warning	BOU	Boulder, Larimer, Weld	12 hr
Jun 4, 9:17 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Boulder, Broomfield, Weld	43 min
Jun 4, 9:19 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	26 min
Jun 4, 9:42 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Broomfield, Denver, Jefferson	33 min
Jun 4, 9:47 PM MDT	Areal Flood Advisory	BOU	Adams, Denver, Jefferson	3 hr
Jun 4, 9:58 PM MDT	Flash Flood Warning Emergency	BOU	Boulder, Larimer	6 hr
Jun 4, 10:39 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver	22 min
Jun 4, 11:00 PM MDT	Severe Thunderstorm Warning	BOU	Denver, Jefferson	30 min
Jun 4, 11:16 PM MDT	Areal Flood Advisory	BOU	Denver, Jefferson	3 hr
Jun 5, 12:42 AM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Denver, Jefferson	33 min
Jun 5, 12:48 AM MDT	Areal Flood Advisory	BOU	Adams, Denver, Jefferson	117 min
Jun 5, 12:52 AM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	23 min
Jun 5, 1:09 AM MDT	Severe Thunderstorm Warning	BOU	Elbert	36 min
Jun 5, 1:45 AM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver	30 min
Jun 5, 2:02 AM MDT	Severe Thunderstorm Warning	BOU	Elbert	28 min
Jun 5, 2:21 AM MDT	Areal Flood Advisory	BOU	Arapahoe, Elbert, Lincoln, Washington	3 hr
Jun 5, 2:26 AM MDT	Tornado Warning	BOU	Elbert	34 min
Jun 5, 3:03 AM MDT	Flash Flood Warning	BOU	Elbert, Lincoln	3 hr
Jun 5, 4:27 AM MDT	Flash Flood Watch	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 13 more	18 hr
Jun 5, 6:12 AM MDT	River Flood Warning	BOU	Adams	38 hr
Jun 5, 9:10 AM MDT	River Flood Warning	BOU	Morgan	11 days
Jun 5, 9:10 AM MDT	River Flood Warning	BOU	Logan, Morgan, Washington	4 days
Jun 5, 12:52 PM MDT	Tornado Warning	BOU	Arapahoe, Douglas	23 min
Jun 5, 1:08 PM MDT	Tornado Warning	BOU	Arapahoe, Douglas, Elbert	37 min
Jun 5, 1:25 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Douglas	3 hr
Jun 5, 1:48 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	42 min
Jun 5, 2:17 PM MDT	Tornado Warning	BOU	Arapahoe, Douglas, Elbert	43 min
Jun 5, 3:04 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	26 min
Jun 5, 3:27 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	33 min
Jun 5, 3:41 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln, Washington	49 min
Jun 5, 4:03 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan	42 min
Jun 5, 4:21 PM MDT	River Flood Warning	BOU	Boulder	65 hr
Jun 5, 4:31 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	29 min
Jun 5, 4:34 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln, Washington	26 min
Jun 5, 4:36 PM MDT	Areal Flood Advisory	BOU	Lincoln, Washington	3 hr
Jun 5, 4:44 PM MDT	Tornado Warning	BOU	Washington	31 min
Jun 5, 4:58 PM MDT	Tornado Warning	BOU	Adams, Washington	32 min
Jun 5, 5:24 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Morgan, Washington	39 min

Nearby

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