Alert archive / Colorado / Tornado Warnings in 2019

Tornado Warning 4, NWS Denver/Boulder, CO

May 26, 2019Adams County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 26, 2019, 5:30 PM MDT for Adams County, Colorado. It was in force for 15 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 26, 2019, 5:30 PM MDT (23:30 UTC)
Expired: May 26, 2019, 5:45 PM MDT
In force: 15 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Adams County, CO

The radar

The Denver radar (KFTG), 5 km from the middle of the area, began a volume at 23:32 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.

What was reported inside it

Time	Report	Where	Remark
May 26, 5:37 PM MDT	TORNADO	2 Ne Watkins, CO	BRIEF TOUCHDOWN APPROXIMATELY 1 MILE SOUTH OF FRONT RANGE AIRPORT. NO DAMAGE REPORTED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 26, 3:46 PM MDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 11.5 hours before the alert went out and 117 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1575 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

986 
WFUS55 KBOU 262330
TORBOU
COC001-262345-
/O.NEW.KBOU.TO.W.0004.190526T2330Z-190526T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
530 PM MDT Sun May 26 2019

The National Weather Service in Denver Colorado has issued a

* Tornado Warning for...
  South central Adams County in northeastern Colorado...

* Until 545 PM MDT.
    
* At 530 PM MDT, a severe thunderstorm capable of producing a tornado
  was located over northeastern Aurora, or 18 miles east of Denver,
  moving northeast at 20 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 dangerous storm will be near...
  Manila Village around 545 PM MDT.

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 3976 10451 3974 10455 3974 10467 3975 10467
      3978 10469 3984 10457
TIME...MOT...LOC 2330Z 228DEG 16KT 3975 10463 

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

$$

RPK

1 follow-up statement

799 
WWUS55 KBOU 262348
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
548 PM MDT Sun May 26 2019

COC001-262357-
/O.EXP.KBOU.TO.W.0004.000000T0000Z-190526T2345Z/
Adams CO-
548 PM MDT Sun May 26 2019

...THE TORNADO WARNING FOR SOUTH CENTRAL ADAMS COUNTY HAS EXPIRED...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning has been allowed to expire.

A Tornado Watch remains in effect until 900 PM MDT for northeastern
Colorado.

LAT...LON 3976 10451 3974 10455 3974 10467 3975 10467
      3978 10469 3984 10457
TIME...MOT...LOC 2347Z 228DEG 16KT 3980 10456 

$$

RPK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 12:00 AM MDT	Special Weather Statement	BOU	Weld	45 min
May 26, 12:33 AM MDT	Severe Thunderstorm Warning	BOU	Weld	31 min
May 26, 3:51 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Weld	39 min
May 26, 3:57 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Weld	48 min
May 26, 4:13 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Weld	30 min
May 26, 4:17 PM MDT	Tornado Warning	BOU	Weld	28 min
May 26, 4:20 PM MDT	Severe Thunderstorm Warning	BOU	Weld	40 min
May 26, 4:34 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	26 min
May 26, 4:39 PM MDT	Severe Thunderstorm Warning	BOU	Weld	21 min
May 26, 5:04 PM MDT	Severe Thunderstorm Warning	BOU	Weld	41 min
May 26, 5:17 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	43 min
May 26, 5:23 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	32 min
May 26, 5:33 PM MDT	Severe Thunderstorm Warning	BOU	Weld	42 min
May 26, 5:42 PM MDT	Tornado Warning	BOU	Weld	33 min
May 26, 5:47 PM MDT	Tornado Warning	BOU	Lincoln	28 min

Nearby

Tornado Warnings in Colorado, 2019 Every tornado warning in 2019 Tornadoes in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.