Alert archive / Colorado / Tornado Warnings in 2014

Tornado Warning 53, NWS Denver/Boulder, CO

June 8, 2014Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 8, 2014, 12:53 PM MDT for Weld County, Colorado. It was in force for 37 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
Jun 8, 2014, 12:53 PM MDT (18:53 UTC)
Expired
Jun 8, 2014, 1:30 PM MDT
In force
37 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.25 in

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 61 km from the middle of the area, began a volume at 18:53 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

TimeReportWhereRemark
Jun 8, 12:54 PM MDTTORNADO2 S Grover, CONO REPORTS OF DAMAGE.

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.

IssuedProductOfficeLasted
Jun 8, 12:19 PM MDTTornado WatchSPC8 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 6.9 hours before the alert went out and 134 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, Denver, CO at 12:00Z on 2014-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 430 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2014-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.193958Sfc1 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
430 J/kg
Mixed-layer CIN
-348 J/kg
Mixed-layer LCL
924 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
87 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.

312 
WFUS55 KBOU 081853
TORBOU
COC123-081930-
/O.NEW.KBOU.TO.W.0053.140608T1853Z-140608T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
1253 PM MDT SUN JUN 8 2014

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL WELD COUNTY IN NORTHEAST COLORADO...

* UNTIL 130 PM MDT

* AT 1253 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES NORTH OF BRIGGSDALE...OR 30 MILES
  NORTHEAST OF GREELEY...MOVING SOUTHEAST AT 20 MPH.

  HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. 

  SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD. 

  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...
  GROVER.

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 IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4066 10450 4089 10440 4088 10406 4063 10416
TIME...MOT...LOC 1853Z 293DEG 16KT 4074 10433 

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

$$

RPK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 12:23 PM MDTTornado WarningBOUPark22 min
Jun 8, 12:36 PM MDTTornado WarningBOUDouglas24 min
Jun 8, 12:42 PM MDTSevere Thunderstorm WarningBOUArapahoe, Douglas33 min
Jun 8, 12:45 PM MDTTornado WarningBOUPark15 min
Jun 8, 12:49 PM MDTTornado WarningBOUArapahoe, Douglas26 min
Jun 8, 1:00 PM MDTTornado WarningBOUWeld30 min
Jun 8, 1:07 PM MDTTornado WarningBOUAdams23 min
Jun 8, 1:09 PM MDTTornado WarningBOUDouglas36 min
Jun 8, 1:20 PM MDTTornado WarningBOUArapahoe, Elbert25 min
Jun 8, 1:25 PM MDTTornado WarningBOUWeld35 min
Jun 8, 1:27 PM MDTTornado WarningBOUMorgan, Weld33 min
Jun 8, 1:34 PM MDTTornado WarningBOUAdams26 min
Jun 8, 1:43 PM MDTTornado WarningBOUArapahoe, Elbert32 min
Jun 8, 1:59 PM MDTTornado WarningBOUWeld31 min
Jun 8, 2:12 PM MDTTornado WarningBOUAdams, Arapahoe, Elbert33 min
Jun 8, 2:38 PM MDTFlash Flood WarningBOUMorgan, Weld3 hr
Jun 8, 2:46 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Washington29 min
Jun 8, 3:08 PM MDTSevere Thunderstorm WarningBOUWashington37 min

Nearby

Tornado Warnings in Colorado, 2014Every tornado warning in 2014Tornadoes in 2014

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.