Alert archive / Colorado / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 63, NWS Denver/Boulder, CO

June 14, 2012Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 14, 2012, 10:11 PM MDT for Lincoln County, Colorado. It was in force for 49 min. 2 reports 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 14, 2012, 10:11 PM MDT (04:11 UTC)
Expired: Jun 14, 2012, 11:00 PM MDT
In force: 49 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Lincoln County, CO

The radar

The Denver radar (KFTG), 116 km from the middle of the area, began a volume at 04:11 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

Time	Report	Where	Remark
Jun 14, 10:15 PM MDT	HAIL 1	8 Se Genoa, CO
Jun 14, 10:46 PM MDT	HAIL 1	9 Nne Genoa, 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 (KDEN), launched 00:00Z, 4.2 hours before the alert went out and 66 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: 6 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 3631 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 107 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.

618 
WUUS55 KBOU 150411
SVRBOU
COC073-150500-
/O.NEW.KBOU.SV.W.0063.120615T0411Z-120615T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1011 PM MDT THU JUN 14 2012

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 1100 PM MDT

* AT 1011 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE...AND DAMAGING WINDS UP TO ABOUT 60 MPH.  THIS STORM
  WAS LOCATED 5 MILES NORTH OF HUGO...OR 11 MILES SOUTHEAST OF
  LIMON...MOVING NORTH AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HUGO...
  GENOA AND ARRIBA.

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 3943 10319 3910 10318 3907 10356 3941 10367
TIME...MOT...LOC 0411Z 159DEG 14KT 3922 10351
WIND...HAIL 60MPH 1.75IN

$$

2 follow-up statements

428 
WWUS55 KBOU 150430
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1030 PM MDT THU JUN 14 2012

COC073-150500-
/O.CON.KBOU.SV.W.0063.000000T0000Z-120615T0500Z/
LINCOLN CO-
1030 PM MDT THU JUN 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT
FOR NORTH CENTRAL LINCOLN COUNTY...

AT 1029 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND
DAMAGING WINDS UP TO ABOUT 60 MPH.  THIS STORM WAS LOCATED 4 MILES
EAST OF GENOA...OR 14 MILES EAST OF LIMON...MOVING NORTH AT 15 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GENOA AND ARRIBA.

THE STORM HAS WEAKENED A LITTLE...BUT LARGE HAIL IS STILL EXPECTED.  
SPOTTERS REPORTED QUARTER SIZED HAIL WITH THIS STORM. 

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 3915 10318 3914 10357 3941 10367 3943 10319
TIME...MOT...LOC 0429Z 188DEG 15KT 3931 10342
WIND...HAIL 60MPH 1.25IN

$$

746 
WWUS55 KBOU 150452
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1052 PM MDT THU JUN 14 2012

COC073-150502-
/O.EXP.KBOU.SV.W.0063.000000T0000Z-120615T0500Z/
LINCOLN CO-
1052 PM MDT THU JUN 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LINCOLN COUNTY
WILL EXPIRE AT 1100 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO 
LONGER EXPECTED TO PRODUCE SEVERE WEATHER. HEAVY RAIN AND SMALL HAIL 
CAN STILL BE EXPECTED WITH THIS STORM.  

LAT...LON 3915 10318 3914 10357 3941 10367 3943 10319
TIME...MOT...LOC 0452Z 186DEG 20KT 3942 10340

$$

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 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, 2:33 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver	42 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.