Alert archive / Colorado / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO

June 2, 2012Douglas County, Elbert County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 2, 2012, 2:16 PM MDT for Douglas County, Elbert County, Colorado. It was in force for 29 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 2, 2012, 2:16 PM MDT (20:16 UTC)
Expired
Jun 2, 2012, 2:45 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 Douglas County, CO, Elbert County, CO

The radar

The Denver radar (KFTG), 32 km from the middle of the area, began a volume at 20:19 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 2, 2:27 PM MDTHAIL 13 E Parker, CO

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

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.3 hours before the alert went out and 126 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 2012-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1766 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
90 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.

073 
WUUS55 KBOU 022016
SVRBOU
COC035-039-022045-
/O.NEW.KBOU.SV.W.0013.120602T2016Z-120602T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
216 PM MDT SAT JUN 2 2012

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ELBERT COUNTY IN EAST CENTRAL COLORADO
  NORTHEASTERN DOUGLAS COUNTY IN NORTHEAST COLORADO

* UNTIL 245 PM MDT

* AT 217 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 3
  MILES NORTHEAST OF THE PINERY...OR 22 MILES SOUTHEAST OF DENVER...
  MOVING EAST AT 10 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE PINERY.

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 3956 10456 3942 10453 3943 10476 3957 10474
TIME...MOT...LOC 2017Z 243DEG 21KT 3951 10464
WIND...HAIL 60MPH 1.00IN

$$
2 follow-up statements
431 
WWUS55 KBOU 022026
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
226 PM MDT SAT JUN 2 2012

COC035-039-022045-
/O.CON.KBOU.SV.W.0013.000000T0000Z-120602T2045Z/
ELBERT CO-DOUGLAS CO-
226 PM MDT SAT JUN 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM MDT
FOR NORTHEASTERN DOUGLAS AND NORTHWESTERN ELBERT COUNTIES...

AT 226 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 4 MILES
NORTHEAST OF THE PINERY...OR 22 MILES SOUTHEAST OF DENVER...MOVING
EAST AT 10 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE
PINERY AND SOUTHERN AURORA.

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 3956 10456 3942 10453 3943 10476 3957 10474
TIME...MOT...LOC 2026Z 237DEG 10KT 3951 10467
WIND...HAIL 60MPH 1.00IN

$$
115 
WWUS55 KBOU 022043 RRA
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
243 PM MDT SAT JUN 2 2012

COC035-039-022054-
/O.EXP.KBOU.SV.W.0013.000000T0000Z-120602T2045Z/
ELBERT CO-DOUGLAS CO-
243 PM MDT SAT JUN 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DOUGLAS AND
NORTHWESTERN ELBERT COUNTIES WILL EXPIRE AT 245 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA.

LAT...LON 3956 10456 3942 10453 3943 10476 3957 10474
TIME...MOT...LOC 2044Z 237DEG 10KT 3954 10462

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 2, 12:50 PM MDTSpecial Weather StatementBOUTeller25 min
Jun 2, 12:56 PM MDTSpecial Weather StatementBOUJefferson34 min
Jun 2, 1:25 PM MDTAreal Flood AdvisoryBOUJefferson95 min
Jun 2, 1:53 PM MDTSpecial Weather StatementBOUDouglas37 min
Jun 2, 1:55 PM MDTSpecial Weather StatementBOUGilpin35 min
Jun 2, 2:00 PM MDTSpecial Weather StatementBOUJefferson30 min
Jun 2, 2:09 PM MDTSevere Thunderstorm WarningBOUJefferson36 min
Jun 2, 2:20 PM MDTSevere Thunderstorm WarningBOUArapahoe, Denver, Jefferson40 min
Jun 2, 2:35 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver40 min
Jun 2, 2:42 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert31 min
Jun 2, 2:50 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe40 min
Jun 2, 3:03 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Elbert42 min
Jun 2, 3:23 PM MDTSevere Thunderstorm WarningBOUAdams, Morgan52 min
Jun 2, 3:29 PM MDTSevere Thunderstorm WarningBOUWashington46 min
Jun 2, 3:37 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln38 min
Jun 2, 3:47 PM MDTSevere Thunderstorm WarningBOUMorgan43 min
Jun 2, 3:57 PM MDTSevere Thunderstorm WarningBOUMorgan48 min
Jun 2, 4:18 PM MDTSevere Thunderstorm WarningBOUWashington42 min
Jun 2, 4:57 PM MDTSpecial Weather StatementBOULogan48 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.