Alert archive / Colorado / Tornado Warnings in 2018

Tornado Warning 31, NWS Denver/Boulder, CO

July 5, 2018Park County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 5, 2018, 1:33 PM MDT for Park County, Colorado. It was in force for 27 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
Jul 5, 2018, 1:33 PM MDT (19:33 UTC)
Expired
Jul 5, 2018, 2:00 PM MDT
In force
27 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Observed
Hail
0.75 in

County Park County, CO

The radar

The Denver radar (KFTG), 154 km from the middle of the area, began a volume at 19:33 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

Grand Junction, CO (KGJT), launched 12:00Z, 7.6 hours before the alert went out and 213 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-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2018-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2018-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
3627 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

689 
WFUS55 KBOU 051933
TORBOU
COC093-052000-
/O.NEW.KBOU.TO.W.0031.180705T1933Z-180705T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Denver CO
133 PM MDT THU JUL 5 2018

The National Weather Service in Denver Colorado has issued a

* Tornado Warning for...
  West central Park County in central Colorado...

* Until 200 PM MDT.

* At 132 PM MDT, a confirmed tornado was located 7 miles west of
  Antero Reservoir, or 58 miles northeast of Gunnison, moving
  northwest at 15 mph.

  HAZARD...Damaging tornado.

  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.

* This tornadic thunderstorm will remain over mainly rural areas of
  west central Park 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 3898 10602 3906 10614 3911 10604 3900 10598
TIME...MOT...LOC 1932Z 145DEG 14KT 3902 10603 

TORNADO...OBSERVED
HAIL...<.75IN

$$

RJK
1 follow-up statement
347 
WWUS55 KBOU 051951
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
151 PM MDT THU JUL 5 2018

COC093-052000-
/O.EXP.KBOU.TO.W.0031.000000T0000Z-180705T2000Z/
Park CO-
151 PM MDT THU JUL 5 2018

...THE TORNADO WARNING FOR WEST CENTRAL PARK COUNTY WILL EXPIRE AT
200 PM MDT...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning is cancelled.

LAT...LON 3898 10602 3906 10614 3911 10604 3900 10598
TIME...MOT...LOC 1950Z 145DEG 14KT 3908 10608 

$$

RJK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 6:02 PM MDTFlash Flood WarningBOULarimer69 min
Jul 4, 6:11 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe49 min
Jul 4, 6:28 PM MDTSpecial Weather StatementBOUWeld47 min
Jul 4, 6:29 PM MDTSevere Thunderstorm WarningBOULarimer32 min
Jul 4, 7:15 PM MDTSpecial Weather StatementBOUMorgan45 min
Jul 4, 7:58 PM MDTSevere Thunderstorm WarningBOUWeld47 min
Jul 4, 8:09 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld51 min
Jul 4, 8:14 PM MDTSpecial Weather StatementBOUJefferson46 min
Jul 4, 8:41 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld49 min
Jul 4, 8:56 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld49 min
Jul 4, 9:26 PM MDTSevere Thunderstorm WarningBOUMorgan20 min
Jul 4, 10:34 PM MDTSevere Thunderstorm WarningBOUWashington41 min
Jul 5, 1:27 AM MDTSpecial Weather StatementBOUArapahoe63 min
Jul 5, 2:24 AM MDTSpecial Weather StatementBOUAdams51 min
Jul 5, 10:16 AM MDTFlash Flood WatchBOUBoulder, Clear Creek, Douglas, Gilpin, Jefferson, Larimer and 1 more9 hr
Jul 5, 1:34 PM MDTFlash Flood WarningBOUPark66 min
Jul 5, 2:37 PM MDTAreal Flood AdvisoryBOUPark83 min
Jul 5, 3:19 PM MDTFlash Flood WarningBOUDouglas, Jefferson115 min
Jul 5, 5:15 PM MDTAreal Flood AdvisoryBOUAdams31 min

Nearby

Tornado Warnings in Colorado, 2018Every tornado warning in 2018Tornadoes in 2018

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.