Alert archive / Colorado / Tornado Warnings in 2017

Tornado Warning 14, NWS Denver/Boulder, CO

June 28, 2017Lincoln County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 28, 2017, 10:40 PM MDT for Lincoln County, Colorado. It was in force for 20 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 28, 2017, 10:40 PM MDT (04:40 UTC)
Expired: Jun 28, 2017, 11:00 PM MDT
In force: 20 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 108 km from the middle of the area, began a volume at 04:40 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 00:00Z, 4.7 hours before the alert went out and 89 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: 218 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 3443 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

326 
WFUS55 KBOU 290440
TORBOU
COC073-290500-
/O.NEW.KBOU.TO.W.0014.170629T0440Z-170629T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
1040 PM MDT WED JUN 28 2017

The National Weather Service in Denver Colorado has issued a

* Tornado Warning for...
  East central Lincoln County in east central Colorado...

* Until 1100 PM MDT
    
* At 1040 PM MDT, a severe thunderstorm capable of producing a
  tornado was located 11 miles north of Boyero, or 16 miles southwest
  of Flagler, moving southeast 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. 

* This tornadic thunderstorm will remain over mainly rural areas of
  east central Lincoln County.

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 outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3907 10327 3912 10323 3912 10317 3902 10316
      3901 10317
TIME...MOT...LOC 0440Z 295DEG 9KT 3909 10322 

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

$$

ENTREKIN

1 follow-up statement

739 
WWUS55 KBOU 290505
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
1105 PM MDT WED JUN 28 2017

COC073-290515-
/O.EXP.KBOU.TO.W.0014.000000T0000Z-170629T0500Z/
Lincoln CO-
1105 PM MDT WED JUN 28 2017

...THE TORNADO WARNING FOR EAST CENTRAL LINCOLN COUNTY HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been allowed to expire.  However, 
small hail is still possible with this storm. 

LAT...LON 3907 10327 3912 10323 3912 10317 3902 10316
      3901 10317
TIME...MOT...LOC 0505Z 295DEG 9KT 3907 10315 

$$

ENTREKIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 10:24 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	29 min
Jun 28, 10:30 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	45 min
Jun 28, 10:52 PM MDT	Tornado Warning	BOU	Elbert, Lincoln	23 min
Jun 28, 11:16 PM MDT	Tornado Warning	BOU	Lincoln	19 min
Jun 29, 1:22 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	38 min
Jun 29, 1:40 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	50 min
Jun 29, 1:51 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	39 min
Jun 29, 2:20 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	40 min
Jun 29, 2:22 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	38 min
Jun 29, 2:55 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	50 min
Jun 29, 3:02 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	43 min
Jun 29, 3:32 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	43 min
Jun 29, 4:00 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	45 min
Jun 29, 4:30 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	45 min
Jun 29, 5:11 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	33 min

Nearby

Tornado Warnings in Colorado, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.