Alert archive / Colorado / Tornado Warnings in 2008

Tornado Warning 39, NWS Denver/Boulder, CO

June 23, 2008Logan County, Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 23, 2008, 5:38 PM MDT for Logan County, Washington County, Colorado. It was in force for 22 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 23, 2008, 5:38 PM MDT (23:38 UTC)
Expired: Jun 23, 2008, 6:00 PM MDT
In force: 22 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

Counties Logan County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 141 km from the middle of the area, began a volume at 23:38 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 23, 6:05 PM MDT	HAIL 1	10 N Akron, 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 23, 4:52 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.6 hours before the alert went out and 62 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: 2907 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 37 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 232338
TORBOU
COC075-121-240000-
/O.NEW.KBOU.TO.W.0039.080623T2338Z-080624T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
538 PM MDT MON JUN 23 2008

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL WASHINGTON COUNTY IN NORTHEAST COLORADO
  SOUTH CENTRAL LOGAN COUNTY IN NORTHEAST COLORADO

* UNTIL 600 PM MDT

* AT 537 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES EAST OF
  PREWITT RESERVOIR...OR 14 MILES SOUTH OF STERLING. THIS STORM WAS
  MOVING EAST AT 10 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PREWITT
  RESERVOIR...MERINO AND BURDETT.

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 4053 10290 4025 10290 4025 10342 4054 10341
TIME...MOT...LOC 2337Z 183DEG 17KT 4045 10328

$$

RPK

1 follow-up statement

000 
WWUS55 KBOU 232346
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
546 PM MDT MON JUN 23 2008

COC075-121-240000-
/O.CON.KBOU.TO.W.0039.000000T0000Z-080624T0000Z/
WASHINGTON CO-LOGAN CO-
543 PM MDT MON JUN 23 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM MDT FOR SOUTH
CENTRAL LOGAN AND NORTH CENTRAL WASHINGTON COUNTIES...

AT 543 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE TWO SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO.  
ONE POSSIBLE TORNADO WAS LOCATED 3 MILES EAST OF MERINO...OR 12 
MILES SOUTHWEST OF STERLING.  ANOTHER POSSIBLE TORNADO WAS LOCATED 5 
MILES NORTHEAST OF MIDWAY IN WASHINGTON COUNTY.  THE STORMS WERE 
MOVING EAST AT 10 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PREWITT RESERVOIR...MERINO AND BURDETT.

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 SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4053 10290 4025 10290 4025 10342 4054 10341
TIME...MOT...LOC 2343Z 183DEG 17KT 4049 10329

$$

RPK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 3:40 PM MDT	Severe Thunderstorm Warning	BOU	Washington	38 min
Jun 23, 4:24 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Weld	27 min
Jun 23, 5:12 PM MDT	Severe Thunderstorm Warning	BOU	Washington	48 min
Jun 23, 5:17 PM MDT	Severe Thunderstorm Warning	BOU	Logan	43 min
Jun 23, 5:20 PM MDT	Areal Flood Advisory	BOU	Washington	85 min
Jun 23, 5:41 PM MDT	Severe Thunderstorm Warning	BOU	Washington	49 min

Nearby

Tornado Warnings in Colorado, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.