Alert archive / Colorado / Tornado Warnings in 2007
Tornado Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Apr 23, 2007, 10:57 PM MDT for Phillips County, Colorado. It was in force for 33 min. 3 reports 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
- Apr 23, 2007, 10:57 PM MDT (04:57 UTC)
- Expired
- Apr 23, 2007, 11:30 PM MDT
- In force
- 33 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Phillips County, CO
The radar
The Goodland radar (KGLD), 131 km from the middle of the area, began a volume at 04:56 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 |
|---|---|---|---|
| Apr 23, 11:00 PM MDT | TORNADO | 14 Se Holyoke, CO | ROOF TORN OFF MOBILE HOME. PEOPLE INSIDE. NO INJURIES. UTILITIES LINES AND POLES DOWN. LATE REPORT. TIME AND LOCATION CORRECTED. |
| Apr 23, 11:14 PM MDT | HAIL 1 | 14 Se Holyoke, CO | |
| Apr 23, 11:30 PM MDT | TSTM WND DMG | 9 Se Holyoke, CO | ROOF BLOWN OFF HOUSE. POWER LINES DOWN. LATE REPORT. |
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 |
|---|---|---|---|
| Apr 23, 2:10 PM MDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 5.0 hours before the alert went out and 112 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
- 351 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1440 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 380 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS55 KBOU 240457 TORBOU COC095-240545- /O.NEW.KBOU.TO.W.0009.070424T0457Z-070424T0545Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 1057 PM MDT MON APR 23 2007 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN PHILLIPS COUNTY IN NORTHEAST COLORADO * UNTIL 1145 PM MDT * AT 1057 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER SOUTHEASTERN PHILLIPS COUNTY...OR ABOUT 13 MILES SOUTHEAST OF HOLYOKE. THIS STORM WAS MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE WARNED COUNTY. 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 4048 10228 4044 10222 4043 10206 4058 10206 $$ BARJENBRUCH
1 follow-up statement
000 WWUS55 KBOU 240530 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1130 PM MDT MON APR 23 2007 COC095-240540- /O.CAN.KBOU.TO.W.0009.000000T0000Z-070424T0545Z/ PHILLIPS CO- 1130 PM MDT MON APR 23 2007 ...THE TORNADO WARNING FOR SOUTHEASTERN PHILLIPS COUNTY IS CANCELLED... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT MDT TUESDAY MORNING FOR NORTHEASTERN COLORADO. LAT...LON 4048 10228 4044 10222 4043 10206 4058 10206 $$ BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 6:04 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 56 min |
| Apr 23, 6:18 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 57 min |
| Apr 23, 6:27 PM MDT | Tornado Warning | BOU | Logan | 48 min |
| Apr 23, 6:59 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Washington | 61 min |
| Apr 23, 7:15 PM MDT | Tornado Warning | BOU | Logan | 45 min |
| Apr 23, 7:43 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe | 28 min |
| Apr 23, 7:51 PM MDT | Tornado Warning | BOU | Morgan, Washington | 39 min |
| Apr 23, 8:02 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 58 min |
| Apr 23, 8:20 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 30 min |
| Apr 23, 8:38 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 67 min |
| Apr 23, 9:46 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 59 min |
| Apr 23, 10:41 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 43 min |
| Apr 24, 5:31 AM MDT | Snow Advisory | BOU | Park | 10 hr |
| Apr 24, 12:19 PM MDT | Tornado Warning | BOU | Lincoln | 41 min |
| Apr 24, 12:58 PM MDT | Tornado Warning | BOU | Lincoln | 47 min |
| Apr 24, 3:46 PM MDT | Snow and Blowing Snow Advisory | BOU | Adams, Arapahoe, Boulder, Elbert, Grand, Jackson and 2 more | 12 hr |
Nearby
Tornado Warnings in Colorado, 2007Every tornado warning in 2007Tornadoes in 2007
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.