Alert archive / Colorado / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 68, NWS Denver/Boulder, CO

June 16, 2012Jefferson County, Park County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 16, 2012, 1:31 PM MDT for Jefferson County, Park County, Colorado. It was in force for 29 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 16, 2012, 1:31 PM MDT (19:31 UTC)
Expired
Jun 16, 2012, 2:00 PM MDT
In force
29 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Jefferson County, CO, Park County, CO

The radar

The Denver radar (KFTG), 78 km from the middle of the area, began a volume at 19:34 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 12:00Z, 7.5 hours before the alert went out and 188 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 2012-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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 12:00Z on 2012-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -70 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
3 J/kg
Mixed-layer CIN
-402 J/kg
Mixed-layer LCL
1050 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-70 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

097 
WUUS55 KBOU 161931
SVRBOU
COC059-093-162000-
/O.NEW.KBOU.SV.W.0068.120616T1931Z-120616T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
131 PM MDT SAT JUN 16 2012

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN PARK COUNTY IN CENTRAL COLORADO
  WEST CENTRAL JEFFERSON COUNTY IN NORTHEAST COLORADO

* UNTIL 200 PM MDT

* AT 131 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS UP TO ABOUT 60 MPH.  THIS STORM WAS LOCATED NEAR
  PINE JUNCTION...OR 30 MILES SOUTHWEST OF DENVER...MOVING EAST AT 15
  MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PINE
  JUNCTION...PINE GROVE...WELLINGTON LAKE...CONIFER...BUFFALO
  CREEK...BAILEY AND ASPEN PARK.

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 3957 10525 3930 10526 3930 10553 3956 10549
TIME...MOT...LOC 1931Z 268DEG 12KT 3946 10539
WIND...HAIL 60MPH 1.00IN

$$
2 follow-up statements
232 
WWUS55 KBOU 161940
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
140 PM MDT SAT JUN 16 2012

COC059-093-162000-
/O.CON.KBOU.SV.W.0068.000000T0000Z-120616T2000Z/
PARK CO-JEFFERSON CO-
140 PM MDT SAT JUN 16 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM MDT
FOR WEST CENTRAL JEFFERSON AND NORTHEASTERN PARK COUNTIES...

AT 140 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...AND
DAMAGING WINDS UP TO ABOUT 60 MPH.  THIS STORM WAS LOCATED NEAR PINE
JUNCTION...OR 29 MILES SOUTHWEST OF DENVER...MOVING EAST AT 15 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PINE JUNCTION...PINE GROVE...WELLINGTON LAKE...CONIFER...BUFFALO
CREEK...BAILEY AND ASPEN PARK.

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 3957 10525 3930 10526 3930 10553 3956 10549
TIME...MOT...LOC 1940Z 268DEG 12KT 3946 10538
WIND...HAIL 60MPH 1.00IN

$$
707 
WWUS55 KBOU 161955
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
155 PM MDT SAT JUN 16 2012

COC059-093-162006-
/O.EXP.KBOU.SV.W.0068.000000T0000Z-120616T2000Z/
PARK CO-JEFFERSON CO-
155 PM MDT SAT JUN 16 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL JEFFERSON AND
NORTHEASTERN PARK COUNTIES WILL EXPIRE AT 200 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO
LONGER EXPECTED TO PRODUCE SEVERE WEATHER.

LAT...LON 3957 10525 3930 10526 3930 10553 3956 10549
TIME...MOT...LOC 1956Z 268DEG 12KT 3946 10531

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 15, 6:16 PM MDTSpecial Weather StatementBOULincoln29 min
Jun 15, 6:47 PM MDTSpecial Weather StatementBOULincoln28 min
Jun 15, 6:50 PM MDTSpecial Weather StatementBOULincoln25 min
Jun 15, 7:24 PM MDTSpecial Weather StatementBOUCrowley36 min
Jun 15, 7:42 PM MDTSpecial Weather StatementBOUPhillips33 min
Jun 16, 1:51 AM MDTSpecial Weather StatementBOUElbert54 min
Jun 16, 2:43 AM MDTSpecial Weather StatementBOUElbert62 min
Jun 16, 3:42 AM MDTSpecial Weather StatementBOUWashington63 min
Jun 16, 3:58 AM MDTFire Weather WatchBOUBoulder, Broomfield, Clear Creek, Douglas, Gilpin, Grand and 6 more10 hr
Jun 16, 12:00 PM MDTSpecial Weather StatementBOUPark30 min
Jun 16, 1:01 PM MDTSpecial Weather StatementBOUPark29 min
Jun 16, 1:37 PM MDTSpecial Weather StatementBOUDouglas23 min
Jun 16, 1:53 PM MDTAreal Flood AdvisoryBOUJefferson82 min
Jun 16, 2:02 PM MDTRed Flag WarningBOUBoulder, Broomfield, Clear Creek, Douglas, Gilpin, Grand and 7 more30 hr
Jun 16, 2:04 PM MDTSpecial Weather StatementBOUDouglas26 min
Jun 16, 2:28 PM MDTSpecial Weather StatementBOUDouglas32 min

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.