Alert archive / Colorado / Tornado Warnings in 2009

Tornado Warning 76, NWS Denver/Boulder, CO

August 10, 2009Lincoln County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Aug 10, 2009, 4:00 AM MDT for Lincoln County, Colorado. It was in force for 21 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: Aug 10, 2009, 4:00 AM MDT (10:00 UTC)
Expired: Aug 10, 2009, 4:21 AM MDT
In force: 21 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 98 km from the middle of the area, began a volume at 10:01 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
Aug 10, 1:49 AM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 10.0 hours before the alert went out and 84 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: 183 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 2871 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS55 KBOU 101000
TORBOU
COC073-101030-
/O.NEW.KBOU.TO.W.0076.090810T1000Z-090810T1030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
400 AM MDT MON AUG 10 2009

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 430 AM MDT

* AT 400 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR HUGO...OR
  14 MILES SOUTHEAST OF LIMON. THIS STORM WAS MOVING SOUTHEAST AT 15 MPH.

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

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.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE
DAMAGING HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

&&

LAT...LON 3923 10356 3923 10327 3899 10327 3899 10357
TIME...MOT...LOC 1000Z 169DEG 24KT 3916 10348

$$

1 follow-up statement

000 
WWUS55 KBOU 101021
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
421 AM MDT MON AUG 10 2009

COC073-101031-
/O.CAN.KBOU.TO.W.0076.000000T0000Z-090810T1030Z/
LINCOLN CO-
421 AM MDT MON AUG 10 2009

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

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

LAT...LON 3923 10356 3923 10327 3899 10327 3899 10357
TIME...MOT...LOC 1021Z 169DEG 24KT 3930 10352

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 6:14 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Phillips	46 min
Aug 9, 6:59 PM MDT	Severe Thunderstorm Warning	BOU	Phillips	31 min
Aug 9, 7:58 PM MDT	Special Weather Statement	BOU	Jefferson	32 min
Aug 9, 8:21 PM MDT	Special Weather Statement	BOU	Denver	24 min
Aug 9, 8:47 PM MDT	Special Weather Statement	BOU	Denver	28 min
Aug 9, 8:56 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	31 min
Aug 9, 10:48 PM MDT	Special Weather Statement	BOU	Arapahoe	27 min
Aug 9, 10:57 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert	33 min
Aug 9, 11:29 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	46 min
Aug 10, 12:47 AM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	28 min
Aug 10, 12:52 AM MDT	Severe Thunderstorm Warning	BOU	Washington	38 min
Aug 10, 1:17 AM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	43 min
Aug 10, 1:25 AM MDT	Severe Thunderstorm Warning	BOU	Elbert	35 min
Aug 10, 1:44 AM MDT	Severe Thunderstorm Warning	BOU	Elbert	46 min
Aug 10, 1:58 AM MDT	Severe Thunderstorm Warning	BOU	Arapahoe	32 min
Aug 10, 2:38 AM MDT	Special Weather Statement	BOU	Elbert	22 min
Aug 10, 2:45 AM MDT	Severe Thunderstorm Warning	BOU	Elbert	45 min
Aug 10, 3:03 AM MDT	Severe Thunderstorm Warning	BOU	Lincoln	42 min
Aug 10, 3:33 AM MDT	Tornado Warning	BOU	Lincoln	27 min
Aug 10, 3:38 AM MDT	Areal Flood Advisory	BOU	Lincoln	97 min
Aug 10, 4:34 AM MDT	Severe Thunderstorm Warning	BOU	Lincoln	41 min
Aug 10, 4:21 PM MDT	Severe Thunderstorm Warning	BOU	Weld	54 min
Aug 10, 4:24 PM MDT	Special Weather Statement	BOU	Arapahoe	36 min
Aug 10, 5:25 PM MDT	Special Weather Statement	BOU	Denver	35 min
Aug 10, 5:30 PM MDT	Special Weather Statement	BOU	Elbert	30 min
Aug 10, 5:33 PM MDT	Special Weather Statement	BOU	Weld	57 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.