Alert archive / Colorado / Tornado Warnings in 2009

Tornado Warning 64, NWS Denver/Boulder, CO

July 12, 2009Lincoln County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 12, 2009, 6:06 PM MDT for Lincoln County, Colorado. It was in force for 13 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: Jul 12, 2009, 6:06 PM MDT (00:06 UTC)
Expired: Jul 12, 2009, 6:19 PM MDT
In force: 13 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 84 km from the middle of the area, began a volume at 00:09 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, 0.1 hours before the alert went out and 143 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: 217 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 2362 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 17 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.

000 
WFUS55 KBOU 130006
TORBOU
COC073-130030-
/O.NEW.KBOU.TO.W.0064.090713T0006Z-090713T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
606 PM MDT SUN JUL 12 2009

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL COLORADO

* UNTIL 630 PM MDT

* AT 605 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OR A FUNNEL   
  CLOUD OVER SOUTHEASTERN LINCOLN COUNTY...OR 54 MILES SOUTHEAST OF  
  LIMON. THIS STORM WAS MOVING NORTHEAST AT 20 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS 
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY 
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU 
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE 
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

&&

LAT...LON 3854 10329 3861 10328 3864 10318 3863 10317
      3853 10318
TIME...MOT...LOC 0005Z 231DEG 18KT 3858 10322

$$


BAKER

1 follow-up statement

000 
WWUS55 KBOU 130019
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
619 PM MDT SUN JUL 12 2009

COC073-130027-
/O.CAN.KBOU.TO.W.0064.000000T0000Z-090713T0030Z/
LINCOLN CO-
619 PM MDT SUN JUL 12 2009

...THE TORNADO WARNING FOR SOUTHEASTERN LINCOLN COUNTY IS
CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. 

LAT...LON 3854 10329 3861 10328 3864 10318 3863 10317
      3853 10318
TIME...MOT...LOC 0017Z 231DEG 18KT 3862 10316

$$


BAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 6:12 PM MDT	Severe Thunderstorm Warning	BOU	Washington	48 min
Jul 12, 6:16 PM MDT	Severe Thunderstorm Warning	BOU	Weld	59 min
Jul 12, 6:56 PM MDT	Severe Thunderstorm Warning	BOU	Washington	30 min
Jul 12, 7:04 PM MDT	Severe Thunderstorm Warning	BOU	Weld	29 min
Jul 12, 8:22 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Phillips, Sedgwick	39 min
Jul 13, 1:54 PM MDT	Special Weather Statement	BOU	Douglas	36 min
Jul 13, 2:17 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Douglas, Elbert	43 min
Jul 13, 3:14 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	41 min

Nearby

Tornado Warnings in Colorado, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.