Alert archive / Colorado / Tornado Warnings in 2010

Tornado Warning 39, NWS Denver/Boulder, CO

June 10, 2010Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 10, 2010, 6:11 PM MDT for Weld County, Colorado. It was in force for 34 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 10, 2010, 6:11 PM MDT (00:11 UTC)
Expired: Jun 10, 2010, 6:45 PM MDT
In force: 34 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 90 km from the middle of the area, began a volume at 00:13 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
Jun 10, 4:44 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.2 hours before the alert went out and 124 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: 658 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 2022 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 355 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

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

828 
WFUS55 KBOU 110011
TORBOU
COC123-110045-
/O.NEW.KBOU.TO.W.0039.100611T0011Z-100611T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
611 PM MDT THU JUN 10 2010

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN WELD COUNTY IN NORTHEAST COLORADO

* UNTIL 645 PM MDT

* AT 611 PM MDT...AMATEUR RADIO WEATHER SPOTTERS REPORTED A FUNNEL
  CLOUD 4 MILES NORTH OF PAWNEE BUTTES...OR 43 MILES NORTH OF FORT
  MORGAN. THIS STORM WAS MOVING EAST AT 30 MPH.

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

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.

&&

LAT...LON 4100 10358 4075 10359 4078 10409 4099 10407
TIME...MOT...LOC 0011Z 270DEG 24KT 4087 10396

$$

1 follow-up statement

771 
WWUS55 KBOU 110045
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
645 PM MDT THU JUN 10 2010

COC123-110056-
/O.EXP.KBOU.TO.W.0039.000000T0000Z-100611T0045Z/
WELD CO-
645 PM MDT THU JUN 10 2010

...THE TORNADO WARNING FOR NORTHEASTERN WELD COUNTY HAS EXPIRED...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT THURSDAY EVENING
FOR NORTHEASTERN COLORADO.

LAT...LON 4100 10358 4075 10359 4078 10409 4099 10407
TIME...MOT...LOC 0011Z 270DEG 24KT 4087 10396

$$

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, 6:29 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, 4:55 PM MDT	Tornado Warning	BOU	Elbert	50 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.