Alert archive / Colorado / Tornado Warnings in 2009
Tornado Warning 53, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 26, 2009, 2:57 PM MDT for Adams County, Arapahoe County, Denver County, Colorado. It was in force for 22 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, 2:57 PM MDT (20:57 UTC)
- Expired
- Jun 26, 2009, 3:19 PM MDT
- In force
- 22 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
Counties Adams County, CO, Arapahoe County, CO, Denver County, CO
The radar
The Denver radar (KFTG), 20 km from the middle of the area, began a volume at 20:57 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 26, 2:38 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 9.0 hours before the alert went out and 132 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS55 KBOU 262057 TORBOU COC001-005-031-262145- /O.NEW.KBOU.TO.W.0053.090626T2057Z-090626T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 257 PM MDT FRI JUN 26 2009 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO SOUTHWESTERN ADAMS COUNTY IN NORTHEAST COLORADO EAST CENTRAL DENVER COUNTY IN NORTHEAST COLORADO * UNTIL 345 PM MDT * AT 257 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EXTREME WESTERN AURORA...OR 5 MILES EAST OF DENVER. THIS STORM WAS MOVING NORTHEAST AT 20 MPH. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BUCKLEY AFB...NORTHEASTERN DENVER AND NORTHWESTERN AURORA. 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 3982 10474 3971 10464 3968 10487 3975 10487 TIME...MOT...LOC 2057Z 238DEG 16KT 3973 10486 $$
1 follow-up statement
000 WWUS55 KBOU 262119 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 319 PM MDT FRI JUN 26 2009 COC001-005-031-262127- /O.CAN.KBOU.TO.W.0053.000000T0000Z-090626T2145Z/ ARAPAHOE CO-ADAMS CO-DENVER CO- 319 PM MDT FRI JUN 26 2009 ...THE TORNADO WARNING FOR EAST CENTRAL DENVER...SOUTHWESTERN ADAMS AND NORTHWESTERN ARAPAHOE COUNTIES IS CANCELLED... STRONG THUNDERSTORM OUTFLOW WINDS HAVE SPREAD ACROSS THE AREA. WHILE THE TORNADO THREAT NO LONGER EXISTS...STRONG DAMAGING WINDS UP TO 70 MPH WILL OCCUR. TAKE COVER AND MOVE INDOORS AS A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THAT AREA. LAT...LON 3982 10474 3971 10464 3968 10487 3975 10487 TIME...MOT...LOC 2117Z 238DEG 16KT 3978 10476 $$ 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, 2:30 PM MDT | Tornado Warning | BOU | Logan, Sedgwick | 45 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, 2:58 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, 2009Every tornado warning in 2009Tornadoes 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.