Alert archive / Colorado / Tornado Warnings in 2009

Tornado Warning 52, NWS Denver/Boulder, CO

June 26, 2009Logan County, Sedgwick County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 26, 2009, 2:30 PM MDT for Logan County, Sedgwick County, Colorado. It was in force for 45 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 26, 2009, 2:30 PM MDT (20:30 UTC)
Expired: Jun 26, 2009, 3:15 PM MDT
In force: 45 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

Counties Logan County, CO, Sedgwick County, CO

The radar

The Cheyenne radar (KCYS), 182 km from the middle of the area, began a volume at 20:31 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, 8.5 hours before the alert went out and 130 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: 18 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 27 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 262030
TORBOU
COC075-115-262115-
/O.NEW.KBOU.TO.W.0052.090626T2030Z-090626T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
230 PM MDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN SEDGWICK COUNTY IN NORTHEAST COLORADO
  NORTHEASTERN LOGAN COUNTY IN NORTHEAST COLORADO

* UNTIL 315 PM MDT

* AT 229 PM MDT...THE PUBLIC REPORTED A FUNNEL CLOUD NEAR 
  CROOK...OR 26 MILES WEST OF JULESBURG.
  NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THIS STORM
  COULD PRODUCE A TORNADO AT ANY TIME.  THIS STORM WAS MOVING        
  NORTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TWIN BUTTES
  AND SEDGWICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SAFE SHELTER IS AVAILABLE...LIE FLAT IN
THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR
HANDS.

&&

LAT...LON 4100 10252 4086 10245 4078 10273 4092 10285
      4099 10284 4100 10272 4100 10264 4101 10263
      4101 10260
TIME...MOT...LOC 2029Z 228DEG 16KT 4086 10272

$$
BARJENBRUCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 6:15 PM MDT	Areal Flood Advisory	BOU	Larimer, Weld	90 min
Jun 25, 6:36 PM MDT	Areal Flood Advisory	BOU	Washington	84 min
Jun 25, 8:09 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Phillips, Sedgwick	35 min
Jun 26, 1:50 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	25 min
Jun 26, 2:38 PM MDT	Special Weather Statement	BOU	Arapahoe, Elbert	37 min
Jun 26, 2:46 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Boulder, Broomfield, Jefferson, Weld	28 min
Jun 26, 2:57 PM MDT	Tornado Warning	BOU	Adams, Arapahoe, Denver	22 min
Jun 26, 2:58 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 3 more	47 min
Jun 26, 3:00 PM MDT	Tornado Warning	BOU	Sedgwick	45 min
Jun 26, 3:18 PM MDT	Tornado Warning	BOU	Adams, Morgan	31 min
Jun 26, 3:26 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Morgan, Weld	34 min
Jun 26, 3:43 PM MDT	Tornado Warning	BOU	Sedgwick	47 min
Jun 26, 3:53 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	52 min
Jun 26, 4:19 PM MDT	Areal Flood Advisory	BOU	Grand, Summit	72 hr
Jun 26, 4:37 PM MDT	Severe Thunderstorm Warning	BOU	Washington	53 min
Jun 26, 5:07 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Phillips, Sedgwick	53 min
Jun 26, 5:56 PM MDT	Severe Thunderstorm Warning	BOU	Phillips, Sedgwick	50 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.