Alert archive / Colorado / Tornado Warnings in 2014

Tornado Warning 67, NWS Denver/Boulder, CO

June 18, 2014Logan County, Phillips County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 18, 2014, 8:10 PM MDT for Logan County, Phillips County, Colorado. It was in force for 50 min. 4 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
Jun 18, 2014, 8:10 PM MDT (02:10 UTC)
Expired
Jun 18, 2014, 9:00 PM MDT
In force
50 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.25 in

Counties Logan County, CO, Phillips County, CO

The radar

The Goodland radar (KGLD), 158 km from the middle of the area, began a volume at 02:11 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 18, 8:40 PM MDTTSTM WND DMGHaxtun, COHIGH THUNDERSTORM WINDS KNOCKED DOWN NUMEROUS TREES AND POWER LINES.
Jun 18, 8:40 PM MDTTSTM WND DMGHaxtun, COHIGH THUNDERSTORM WINDS KNOCKED DOWN NUMEROUS TREES AND POWER LINES. 15 HOMES DAMAGED.
Jun 18, 8:55 PM MDTTSTM WND DMG3 E Haxtun, COGRAIN BINS DAMAGED. 100 FT TRANSMISSION TOWER TWISTED.
Jun 18, 9:00 PM MDTTSTM WND GST 714 E Haxtun, CODAMAGE TO BARN/STORAGE AREA SOUTH OF LOCATION. SOME TREES DOWN AND POWER OUTAGES.

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

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 2.2 hours before the alert went out and 91 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 00:00Z on 2014-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 382 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2014-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 square meters per square second.19395878Sfc1 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
382 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
2444 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
391 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

062 
WFUS55 KBOU 190210
TORBOU
COC075-095-190300-
/O.NEW.KBOU.TO.W.0067.140619T0210Z-140619T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
810 PM MDT WED JUN 18 2014

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN PHILLIPS COUNTY IN NORTHEAST COLORADO...
  SOUTHEASTERN LOGAN COUNTY IN NORTHEAST COLORADO...

* UNTIL 900 PM MDT
    
* AT 809 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 9 MILES WEST OF ST PETERSBURG...OR 15 MILES
  SOUTHEAST OF STERLING...MOVING EAST AT 30 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. 

* LOCATIONS IMPACTED INCLUDE...
  HAXTUN...FLEMING...PAOLI...HIGHLAND CENTER...ST PETERSBURG AND
  FAIRFIELD.

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 4044 10246 4044 10304 4064 10310 4075 10253
      4074 10249
TIME...MOT...LOC 0209Z 251DEG 28KT 4050 10299 

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

$$

BARJENBRUCH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 6:03 PM MDTSpecial Weather StatementBOUBroomfield27 min
Jun 18, 6:28 PM MDTSpecial Weather StatementBOUDenver32 min
Jun 18, 6:33 PM MDTSpecial Weather StatementBOUBroomfield27 min
Jun 18, 6:57 PM MDTSpecial Weather StatementBOUBroomfield, Denver33 min
Jun 18, 7:06 PM MDTSevere Thunderstorm WarningBOUAdams, Denver24 min
Jun 18, 7:18 PM MDTSevere Thunderstorm WarningBOUMorgan42 min
Jun 18, 7:29 PM MDTSevere Thunderstorm WarningBOULogan, Washington46 min
Jun 18, 7:33 PM MDTSpecial Weather StatementBOUAdams27 min
Jun 18, 7:41 PM MDTTornado WarningBOULogan, Washington34 min
Jun 18, 8:00 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington30 min
Jun 18, 8:17 PM MDTTornado WarningBOUWashington28 min
Jun 18, 8:40 PM MDTTornado Warning Tornado observedBOUWashington35 min
Jun 18, 8:48 PM MDTTornado WarningBOULogan, Phillips, Sedgwick27 min
Jun 18, 9:10 PM MDTTornado WarningBOUPhillips, Sedgwick35 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.