Alert archive / Colorado / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 65, NWS Denver/Boulder, CO

June 15, 2012Adams County, Denver County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 15, 2012, 2:33 PM MDT for Adams County, Denver County, Colorado. It was in force for 42 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 15, 2012, 2:33 PM MDT (20:33 UTC)
Expired: Jun 15, 2012, 3:15 PM MDT
In force: 42 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Adams County, CO, Denver County, CO

The radar

The Denver radar (KFTG), 14 km from the middle of the area, began a volume at 20:34 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 15, 1:35 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.6 hours before the alert went out and 124 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 7 J/kg
Mixed-layer CIN: -278 J/kg
Mixed-layer LCL: 1830 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -227 m²/s²
0-3 km storm-relative helicity: 9 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.

323 
WUUS55 KBOU 152033
SVRBOU
COC001-031-152115-
/O.NEW.KBOU.SV.W.0065.120615T2033Z-120615T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
233 PM MDT FRI JUN 15 2012

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL ADAMS COUNTY IN NORTHEAST COLORADO
  NORTHEASTERN DENVER COUNTY IN NORTHEAST COLORADO

* UNTIL 315 PM MDT

* AT 233 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO ABOUT
  60 MPH.  THIS STORM WAS LOCATED OVER EXTREME SOUTHWESTERN DENVER
  INTERNATIONAL AIRPORT...OR 12 MILES NORTHEAST OF DENVER...MOVING
  EAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO D.I.A.
  TERMINAL AND CONCOURSES...DENVER INTERNATIONAL AIRPORT...
  NORTHEASTERN DENVER...EASTERN COMMERCE CITY AND NORTHERN 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 3990 10459 3978 10460 3978 10482 3990 10481
TIME...MOT...LOC 2033Z 270DEG 14KT 3983 10476
WIND...HAIL 60MPH <.75IN

$$

2 follow-up statements

729 
WWUS55 KBOU 152046
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
246 PM MDT FRI JUN 15 2012

COC001-031-152115-
/O.CON.KBOU.SV.W.0065.000000T0000Z-120615T2115Z/
ADAMS CO-DENVER CO-
246 PM MDT FRI JUN 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM MDT
FOR NORTHEASTERN DENVER AND WEST CENTRAL ADAMS COUNTIES...

AT 247 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO ABOUT
60 MPH.  THIS STORM WAS LOCATED OVER SOUTHERN DENVER INTERNATIONAL
AIRPORT...OR 15 MILES NORTHEAST OF DENVER...MOVING EAST AT 15 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
D.I.A. TERMINAL AND CONCOURSES...DENVER INTERNATIONAL AIRPORT...
NORTHEASTERN DENVER...EASTERN COMMERCE CITY AND NORTHERN 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 3990 10459 3978 10460 3978 10482 3990 10481
TIME...MOT...LOC 2047Z 270DEG 14KT 3983 10468
WIND...HAIL 60MPH <.75IN

$$

294 
WWUS55 KBOU 152110
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
310 PM MDT FRI JUN 15 2012

COC001-031-152120-
/O.EXP.KBOU.SV.W.0065.000000T0000Z-120615T2115Z/
ADAMS CO-DENVER CO-
310 PM MDT FRI JUN 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DENVER AND WEST
CENTRAL ADAMS COUNTIES WILL EXPIRE AT 315 PM MDT...

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

LAT...LON 3990 10459 3978 10460 3978 10482 3990 10481
TIME...MOT...LOC 2110Z 270DEG 14KT 3983 10456

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 8:40 PM MDT	Special Weather Statement	BOU	Lincoln	35 min
Jun 14, 9:08 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	37 min
Jun 14, 9:41 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	34 min
Jun 14, 10:11 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	49 min
Jun 15, 2:50 AM MDT	Special Weather Statement	BOU	Arapahoe	40 min
Jun 15, 1:49 PM MDT	Special Weather Statement	BOU	Jefferson	26 min
Jun 15, 2:14 PM MDT	Special Weather Statement	BOU	Douglas	31 min
Jun 15, 2:20 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Douglas	40 min
Jun 15, 3:02 PM MDT	Tornado Warning	BOU	Adams	28 min
Jun 15, 3:27 PM MDT	Special Weather Statement	BOU	Adams, Arapahoe	33 min
Jun 15, 3:52 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	38 min
Jun 15, 4:31 PM MDT	Special Weather Statement	BOU	Arapahoe	29 min
Jun 15, 5:21 PM MDT	Special Weather Statement	BOU	Lincoln	24 min
Jun 15, 5:41 PM MDT	Special Weather Statement	BOU	Washington	34 min
Jun 15, 5:59 PM MDT	Severe Thunderstorm Warning	BOU	Washington	31 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2012 Every 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.