Alert archive / Colorado / Tornado Warnings in 2010

Tornado Warning 49, NWS Denver/Boulder, CO

June 11, 2010Elbert County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 11, 2010, 4:55 PM MDT for Elbert County, Colorado. It was in force for 50 min. 1 report 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 11, 2010, 4:55 PM MDT (22:55 UTC)
Expired: Jun 11, 2010, 5:45 PM MDT
In force: 50 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Elbert County, CO

The radar

The Denver radar (KFTG), 69 km from the middle of the area, began a volume at 22:58 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 11, 5:03 PM MDT	TORNADO	3 W Ramah, CO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 11, 2:13 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.9 hours before the alert went out and 114 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1293 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -56 m²/s²
0-3 km storm-relative helicity: 44 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.

257 
WFUS55 KBOU 112255
TORBOU
COC039-112345-
/O.NEW.KBOU.TO.W.0049.100611T2255Z-100611T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
455 PM MDT FRI JUN 11 2010

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 545 PM MDT

* AT 454 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 14 MILES WEST OF
  SIMLA...OR 31 MILES NORTHEAST OF COLORADO SPRINGS. THIS STORM WAS
  MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SIMLA AND
  MATHESON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM REPLACES THE TORNADO WARNING THAT WAS PREVIOUSLY IN 
EFFECT FOR CENTRAL ELBERT COUNTY UNTIL 515 PM MDT.  TORNADIC 
ACTIVITY WILL BE MOST LIKELY ALONG THE EL PASO-ELBERT COUNTY LINE.

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

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

&&

LAT...LON 3921 10453 3943 10404 3919 10386 3912 10409
      3912 10446
TIME...MOT...LOC 2254Z 236DEG 22KT 3915 10430

$$

2 follow-up statements

874 
WWUS55 KBOU 112315
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
515 PM MDT FRI JUN 11 2010

COC039-112345-
/O.CON.KBOU.TO.W.0049.000000T0000Z-100611T2345Z/
ELBERT CO-
515 PM MDT FRI JUN 11 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR CENTRAL
ELBERT COUNTY...

AT 512 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM WAS
LOCATED 8 MILES NORTHWEST OF SIMLA...OR 29 MILES WEST OF LIMON. THIS 
STORM WAS MOVING NORTHEAST AT 20 MPH. AT 503 PM MDT...A SPOTTER 
REPORTED A TORNADO ABOUT 3 MILES WEST OF RAMAH...ON THE EL 
PASO-ELBERT COUNTY LINE. 

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SIMLA AND MATHESON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE
DAMAGING HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. THE THUNDERSTORM 
APPEARS TO BE DRAWING STRONG SOUTHEASTERLY WINDS INTO THE CELL...AND 
WILL ALSO BE CAPABLE OF PRODUCING STRONG OUTFLOW WINDS ASSOCIATED 
WITH HEAVY RAINFALL AND HAIL.  

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FRIDAY EVENING FOR
NORTHEASTERN COLORADO.

&&

LAT...LON 3921 10453 3943 10404 3919 10386 3912 10409
      3912 10446
TIME...MOT...LOC 2312Z 239DEG 20KT 3920 10420

$$

364 
WWUS55 KBOU 112332
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
532 PM MDT FRI JUN 11 2010

COC039-112345-
/O.CON.KBOU.TO.W.0049.000000T0000Z-100611T2345Z/
ELBERT CO-
532 PM MDT FRI JUN 11 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR CENTRAL
ELBERT COUNTY...

AT 532 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM WAS
LOCATED 5 MILES NORTHWEST OF MATHESON...OR 19 MILES WEST OF LIMON. 
THIS STORM WAS MOVING EAST AT 30 MPH. AT 529 PM MDT...A SPOTTER IN 
LINCOLN COUNTY REPORTED A TORNADO ON THE GROUND ABOUT 25 MILES WEST 
OF HUGO. 

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SIMLA AND MATHESON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FRIDAY EVENING FOR
NORTHEASTERN COLORADO.

&&

LAT...LON 3921 10453 3943 10404 3919 10386 3912 10409
      3912 10446
TIME...MOT...LOC 2332Z 254DEG 24KT 3923 10404

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 6:11 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Broomfield, Jefferson, Weld	49 min
Jun 10, 6:11 PM MDT	Tornado Warning	BOU	Weld	34 min
Jun 10, 6:29 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	61 min
Jun 10, 6:37 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	38 min
Jun 10, 6:41 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	64 min
Jun 10, 6:51 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Weld	54 min
Jun 10, 7:09 PM MDT	Tornado Warning	BOU	Arapahoe, Washington	51 min
Jun 10, 7:21 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Morgan, Washington	84 min
Jun 10, 7:43 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Weld	46 min
Jun 10, 7:45 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	60 min
Jun 10, 7:48 PM MDT	Tornado Warning	BOU	Washington	42 min
Jun 10, 8:05 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Morgan, Weld	55 min
Jun 10, 8:12 PM MDT	Tornado Warning	BOU	Washington	48 min
Jun 10, 8:54 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Morgan, Washington	66 min
Jun 10, 8:57 PM MDT	Tornado Warning	BOU	Washington	48 min
Jun 10, 10:00 PM MDT	Severe Thunderstorm Warning	BOU	Washington	60 min
Jun 10, 10:25 PM MDT	Severe Thunderstorm Warning	BOU	Phillips, Sedgwick	19 min
Jun 10, 10:54 PM MDT	Severe Thunderstorm Warning	BOU	Washington	36 min
Jun 11, 2:43 PM MDT	Severe Thunderstorm Warning	BOU	Clear Creek, Jefferson, Park	32 min
Jun 11, 3:14 PM MDT	Severe Thunderstorm Warning	BOU	Denver, Jefferson	31 min
Jun 11, 3:26 PM MDT	Areal Flood Advisory	BOU	Jefferson	79 min
Jun 11, 3:44 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver, Jefferson	31 min
Jun 11, 3:51 PM MDT	Tornado Warning	BOU	Adams, Broomfield, Denver, Jefferson, Weld	39 min
Jun 11, 3:58 PM MDT	Areal Flood Advisory	BOU	Adams	67 min
Jun 11, 4:02 PM MDT	Severe Thunderstorm Warning	BOU	Weld	58 min
Jun 11, 4:18 PM MDT	Areal Flood Advisory	BOU	Weld	87 min
Jun 11, 4:22 PM MDT	Tornado Warning	BOU	Adams, Denver, Weld	38 min
Jun 11, 4:35 PM MDT	Tornado Warning	BOU	Elbert	40 min
Jun 11, 4:42 PM MDT	Tornado Warning	BOU	Weld	48 min
Jun 11, 4:59 PM MDT	Tornado Warning	BOU	Adams, Morgan, Weld	46 min
Jun 11, 5:00 PM MDT	Areal Flood Advisory	BOU	Elbert	90 min
Jun 11, 5:14 PM MDT	Areal Flood Advisory	BOU	Morgan, Weld	54 min
Jun 11, 5:28 PM MDT	Tornado Warning	BOU	Weld	47 min
Jun 11, 5:32 PM MDT	Flash Flood Warning	BOU	Morgan, Weld	3 hr
Jun 11, 5:37 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	53 min
Jun 11, 5:40 PM MDT	Tornado Warning	BOU	Morgan, Weld	35 min
Jun 11, 5:46 PM MDT	Tornado Warning	BOU	Elbert, Lincoln	44 min
Jun 11, 5:49 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver	86 min

Nearby

Tornado Warnings in Colorado, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.