Alert archive / Colorado / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 55, NWS Denver/Boulder, CO

June 7, 2012Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 7, 2012, 10:15 PM MDT for Lincoln County, Colorado. It was in force for 45 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 7, 2012, 10:15 PM MDT (04:15 UTC)
Expired
Jun 7, 2012, 11:00 PM MDT
In force
45 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
2.0 in
Wind
50.0 mph

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 28 km from the middle of the area, began a volume at 04:18 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

Denver, CO (KDNR), launched 00:00Z, 4.3 hours before the alert went out and 151 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 2012-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1009 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 2012-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
1009 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
2384 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
80 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

206 
WUUS55 KBOU 080415
SVRBOU
COC073-080500-
/O.NEW.KBOU.SV.W.0055.120608T0415Z-120608T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1015 PM MDT THU JUN 7 2012

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN LINCOLN COUNTY IN EAST CENTRAL COLORADO

* UNTIL 1100 PM MDT

* AT 1015 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  HEN EGG SIZE.  THIS STORM WAS LOCATED OVER EXTREME SOUTHEASTERN EL
  PASO COUNTY...OR 40 MILES EAST OF COLORADO SPRINGS...MOVING
  SOUTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
  WARNED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

&&

LAT...LON 3854 10405 3864 10405 3878 10404 3870 10380
      3866 10379 3852 10380
TIME...MOT...LOC 0415Z 309DEG 7KT 3867 10409
WIND...HAIL <50MPH 2.00IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 6:10 PM MDTSevere Thunderstorm WarningBOULogan50 min
Jun 7, 6:28 PM MDTTornado WarningBOUElbert47 min
Jun 7, 6:31 PM MDTSevere Thunderstorm WarningBOUWeld44 min
Jun 7, 7:05 PM MDTTornado WarningBOULogan, Weld40 min
Jun 7, 7:14 PM MDTTornado WarningBOUElbert31 min
Jun 7, 7:45 PM MDTSevere Thunderstorm WarningBOUWeld45 min
Jun 7, 8:05 PM MDTSevere Thunderstorm WarningBOUWeld40 min
Jun 7, 8:31 PM MDTSevere Thunderstorm WarningBOUWeld20 min
Jun 7, 8:33 PM MDTTornado WarningBOUWeld27 min
Jun 7, 8:57 PM MDTTornado WarningBOUWeld33 min
Jun 7, 9:00 PM MDTSevere Thunderstorm WarningBOULarimer, Weld45 min
Jun 7, 9:28 PM MDTTornado WarningBOUWeld32 min
Jun 7, 9:42 PM MDTSevere Thunderstorm WarningBOULarimer, Weld48 min
Jun 7, 9:57 PM MDTTornado WarningBOUWeld33 min
Jun 7, 10:29 PM MDTSevere Thunderstorm WarningBOUWeld46 min
Jun 7, 10:37 PM MDTAreal Flood AdvisoryBOUWeld83 min
Jun 7, 10:59 PM MDTSevere Thunderstorm WarningBOULincoln34 min
Jun 7, 11:02 PM MDTSevere Thunderstorm WarningBOUWeld43 min
Jun 7, 11:12 PM MDTSevere Thunderstorm WarningBOUWeld33 min
Jun 8, 1:40 AM MDTSevere Thunderstorm WarningBOUElbert37 min
Jun 8, 3:03 PM MDTRed Flag WarningBOUBoulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 5 more55 hr

Nearby

Severe Thunderstorm Warnings in Colorado, 2012Every severe thunderstorm warning in 2012

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.