Alert archive / Colorado / Tornado Warnings in 2014

Tornado Warning 29, NWS Denver/Boulder, CO

June 4, 2014Arapahoe County, Lincoln County, Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 4, 2014, 7:38 PM MDT for Arapahoe County, Lincoln County, Washington County, Colorado. It was in force for 22 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
Jun 4, 2014, 7:38 PM MDT (01:38 UTC)
Expired
Jun 4, 2014, 8:00 PM MDT
In force
22 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Arapahoe County, CO, Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 79 km from the middle of the area, began a volume at 01:42 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 4, 5:12 PM MDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 1.6 hours before the alert went out and 52 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 2014-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 168 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 00:00Z on 2014-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.1939587897Sfc1 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
168 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
3163 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
262 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

528 
WFUS55 KBOU 050138
TORBOU
COC005-073-121-050200-
/O.NEW.KBOU.TO.W.0029.140605T0138Z-140605T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
738 PM MDT WED JUN 4 2014

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO...
  SOUTHWESTERN WASHINGTON COUNTY IN NORTHEAST COLORADO...
  NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL COLORADO...

* UNTIL 800 PM MDT
    
* AT 737 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 4 MILES SOUTHEAST OF COTTONWOOD VALLEY...OR 21
  MILES NORTH OF LIMON...MOVING EAST AT 30 MPH.

  HAZARD...TORNADO AND QUARTER 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
  SOUTHEASTERN ARAPAHOE...SOUTHWESTERN WASHINGTON AND NORTH CENTRAL
  LINCOLN COUNTIES.

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 3951 10372 3957 10372 3957 10385 3962 10384
      3964 10344 3948 10345
TIME...MOT...LOC 0137Z 279DEG 30KT 3958 10375 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

COOPER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 6:00 PM MDTSevere Thunderstorm WarningBOUWashington45 min
Jun 4, 7:16 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Elbert44 min
Jun 4, 7:58 PM MDTTornado WarningBOUElbert, Lincoln32 min
Jun 4, 8:26 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert49 min
Jun 4, 8:32 PM MDTTornado WarningBOULincoln28 min
Jun 4, 8:41 PM MDTSevere Thunderstorm WarningBOUArapahoe, Douglas, Elbert34 min
Jun 4, 9:15 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert45 min
Jun 4, 9:19 PM MDTSevere Thunderstorm WarningBOUElbert41 min
Jun 4, 9:24 PM MDTSpecial Weather StatementBOUDouglas51 min
Jun 4, 9:33 PM MDTAreal Flood AdvisoryBOUGrand, Summit4 days
Jun 4, 9:50 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln40 min
Jun 4, 10:11 PM MDTTornado WarningBOUElbert, Lincoln34 min
Jun 4, 10:32 PM MDTTornado Warning Tornado observedBOULincoln43 min
Jun 5, 2:47 PM MDTSpecial Weather StatementBOUArapahoe, Douglas28 min
Jun 5, 2:58 PM MDTSevere Thunderstorm WarningBOUElbert47 min
Jun 5, 3:42 PM MDTSevere Thunderstorm WarningBOUElbert33 min
Jun 5, 4:13 PM MDTSevere Thunderstorm WarningBOUElbert47 min
Jun 5, 4:27 PM MDTSpecial Weather StatementBOUDenver33 min
Jun 5, 4:50 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln40 min
Jun 5, 4:55 PM MDTSevere Thunderstorm WarningBOUAdams, Denver35 min
Jun 5, 5:00 PM MDTSevere Thunderstorm WarningBOUJefferson30 min
Jun 5, 5:24 PM MDTSevere Thunderstorm WarningBOULincoln51 min
Jun 5, 5:51 PM MDTSevere Thunderstorm WarningBOUArapahoe, Denver, Douglas24 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.