Alert archive / Colorado / Tornado Warnings in 2019

Tornado Warning 9, NWS Denver/Boulder, CO

May 27, 2019Adams County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 27, 2019, 1:42 PM MDT for Adams County, Colorado. It was in force for 33 min. 2 reports 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 27, 2019, 1:42 PM MDT (19:42 UTC)
Expired: May 27, 2019, 2:15 PM MDT
In force: 33 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

County Adams County, CO

The radar

The Denver radar (KFTG), 30 km from the middle of the area, began a volume at 19:44 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 27, 1:43 PM MDT	TORNADO	8 N Strasburg, CO	WEAK TORNADO WITH A BRIEF TOUCHDOWN IN AN OPEN FIELD. NO DAMAGE REPORTED.
May 27, 1:52 PM MDT	HAIL 1	11 N Strasburg, CO

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 27, 12:56 PM MDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 7.7 hours before the alert went out and 87 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: 1644 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

472 
WFUS55 KBOU 271942
TORBOU
COC001-272015-
/O.NEW.KBOU.TO.W.0009.190527T1942Z-190527T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
142 PM MDT Mon May 27 2019

The National Weather Service in Denver Colorado has issued a

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

* Until 215 PM MDT.
    
* At 141 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles north of Strasburg, or 37 miles east of
  Denver, moving northeast 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.

* This tornadic thunderstorm will remain over mainly rural areas of
  north central Adams 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 3997 10408 3988 10414 3984 10422 3982 10431
      3989 10448 3999 10441 4000 10439 4000 10410
TIME...MOT...LOC 1941Z 221DEG 20KT 3988 10431 

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

$$

RJK

3 follow-up statements

177 
WWUS55 KBOU 271952
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
152 PM MDT Mon May 27 2019

COC001-272015-
/O.CON.KBOU.TO.W.0009.000000T0000Z-190527T2015Z/
Adams CO-
152 PM MDT Mon May 27 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 215 PM MDT FOR NORTH
CENTRAL ADAMS COUNTY...
    
At 150 PM MDT, a confirmed tornado was located 8 miles north of 
Strasburg, or 38 miles southwest of Fort Morgan, moving northeast at 
15 mph.

HAZARD...Damaging tornado and ping pong ball size hail.

SOURCE...Public 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.

This tornadic thunderstorm will remain over mainly rural areas of
north central Adams County.

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 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 3994 10416 3987 10421 3985 10425 3984 10432
      3989 10445 3996 10441 4000 10439 4000 10414
TIME...MOT...LOC 1950Z 213DEG 15KT 3990 10431 

TORNADO...OBSERVED
HAIL...1.50IN

$$

RJK

042 
WWUS55 KBOU 272005
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
205 PM MDT Mon May 27 2019

COC001-272015-
/O.CON.KBOU.TO.W.0009.000000T0000Z-190527T2015Z/
Adams CO-
205 PM MDT Mon May 27 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 215 PM MDT FOR NORTH
CENTRAL ADAMS COUNTY...
    
At 204 PM MDT, a confirmed tornado was located 9 miles southeast of
Prospect Valley, or 33 miles southwest of Fort Morgan, moving north
at 20 mph.

HAZARD...Damaging tornado and quarter size hail.

SOURCE...Public 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.

This tornadic thunderstorm will remain over mainly rural areas of
north central Adams County.

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 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 3993 10423 3991 10431 3994 10437 4000 10437
      4000 10421
TIME...MOT...LOC 2004Z 198DEG 18KT 3997 10430 

TORNADO...OBSERVED
HAIL...1.00IN

$$

RJK

716 
WWUS55 KBOU 272012
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
212 PM MDT Mon May 27 2019

COC001-272021-
/O.EXP.KBOU.TO.W.0009.000000T0000Z-190527T2015Z/
Adams CO-
212 PM MDT Mon May 27 2019

...THE TORNADO WARNING FOR NORTH CENTRAL ADAMS COUNTY WILL EXPIRE AT
215 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.

At 150 PM MDT, there was a confirmed tornado located 8 miles north 
of Strasburg, or 38 miles southwest of Fort Morgan.

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

LAT...LON 3993 10423 3991 10431 3994 10437 4000 10437
      4000 10421
TIME...MOT...LOC 2011Z 221DEG 20KT 3999 10427 

$$

RJK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 6:10 PM MDT	Tornado Warning	BOU	Weld	21 min
May 26, 6:13 PM MDT	Tornado Warning	BOU	Lincoln	32 min
May 26, 6:41 PM MDT	Severe Thunderstorm Warning	BOU	Weld	49 min
May 27, 4:36 AM MDT	Winter Storm Watch	BOU	Boulder, Grand, Jackson, Larimer	10 hr
May 27, 12:50 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	40 min
May 27, 1:28 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Weld	47 min
May 27, 2:00 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	45 min
May 27, 2:41 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Morgan, Weld	49 min
May 27, 3:01 PM MDT	Winter Storm Warning	BOU	Boulder, Grand, Jackson, Larimer	33 hr
May 27, 3:01 PM MDT	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 2 more	33 hr
May 27, 3:03 PM MDT	Tornado Warning Tornado observed	BOU	Logan, Morgan, Weld	27 min
May 27, 3:30 PM MDT	Tornado Warning Tornado observed	BOU	Logan	30 min
May 27, 3:40 PM MDT	Severe Thunderstorm Warning	BOU	Weld	35 min
May 27, 3:59 PM MDT	Tornado Warning	BOU	Logan	31 min
May 27, 4:00 PM MDT	Tornado Warning	BOU	Weld	15 min
May 27, 4:28 PM MDT	Tornado Warning	BOU	Logan, Sedgwick	47 min
May 27, 4:49 PM MDT	Tornado Warning	BOU	Adams, Weld	26 min
May 27, 4:55 PM MDT	Areal Flood Advisory	BOU	Logan, Sedgwick	65 min
May 27, 4:55 PM MDT	Tornado Warning	BOU	Logan, Phillips, Sedgwick	35 min
May 27, 4:58 PM MDT	Severe Thunderstorm Warning	BOU	Weld	47 min
May 27, 5:26 PM MDT	Tornado Warning	BOU	Sedgwick	32 min
May 27, 5:40 PM MDT	Severe Thunderstorm Warning	BOU	Phillips	50 min
May 27, 5:52 PM MDT	Flash Flood Warning	BOU	Logan	83 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.