Alert archive / Colorado / Tornado Watches in 2009

Tornado Watch 410

June 14, 200919 counties in Colorado; 11 counties in Nebraska; 4 counties in Wyoming

The Storm Prediction Center issued this tornado watch at Jun 14, 2009, 1:50 PM MDT for 19 counties in Colorado; 11 counties in Nebraska; 4 counties in Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 14, 2009, 1:50 PM MDT (19:50 UTC)
Expired
Jun 14, 2009, 9:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 34 counties

Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Cheyenne County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Kit Carson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Denver radar (KFTG), 82 km from the middle of the area, began a volume at 19:49 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

33 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 14, 1:59 PM MDTFlash Flood WarningCYSPlatte3 hr
Jun 14, 2:33 PM MDTTornado WarningCYSGoshen30 min
Jun 14, 2:35 PM MDTSevere Thunderstorm WarningBOUAdams, Denver, Jefferson10 min
Jun 14, 2:42 PM MDTTornado WarningBOUAdams, Broomfield, Denver, Jefferson48 min
Jun 14, 2:46 PM MDTTornado WarningCYSGoshen29 min
Jun 14, 2:58 PM MDTTornado WarningBOUAdams, Broomfield, Weld47 min
Jun 14, 3:01 PM MDTFlash Flood WarningCYSGoshen3 hr
Jun 14, 3:13 PM MDTTornado WarningBOUArapahoe32 min
Jun 14, 3:13 PM MDTTornado WarningCYSScotts Bluff47 min
Jun 14, 3:26 PM MDTSevere Thunderstorm WarningBOUAdams, Denver36 min
Jun 14, 3:45 PM MDTSevere Thunderstorm WarningBOUArapahoe45 min
Jun 14, 3:53 PM MDTSevere Thunderstorm WarningBOUWeld20 min
Jun 14, 3:54 PM MDTSevere Thunderstorm WarningBOUElbert51 min
Jun 14, 3:54 PM MDTTornado WarningCYSBanner, Scotts Bluff36 min
Jun 14, 4:12 PM MDTSevere Thunderstorm WarningCYSBanner35 min
Jun 14, 4:26 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln, Washington49 min
Jun 14, 4:30 PM MDTTornado WarningCYSBanner, Scotts Bluff45 min
Jun 14, 4:54 PM MDTFlash Flood WarningCYSPlatte4 hr
Jun 14, 4:55 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington28 min
Jun 14, 5:13 PM MDTSevere Thunderstorm WarningCYSMorrill, Scotts Bluff62 min
Jun 14, 5:14 PM MDTSevere Thunderstorm WarningBOULincoln46 min
Jun 14, 5:34 PM MDTSevere Thunderstorm WarningGLDKit Carson, Yuma56 min
Jun 14, 5:35 PM MDTSevere Thunderstorm WarningBOULogan, Washington43 min
Jun 14, 5:38 PM MDTSevere Thunderstorm WarningBOULincoln40 min
Jun 14, 5:48 PM MDTSevere Thunderstorm WarningCYSCheyenne, Morrill33 min
Jun 14, 5:57 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln48 min
Jun 14, 6:00 PM MDTSevere Thunderstorm WarningBOULogan20 min
Jun 14, 6:09 PM MDTSevere Thunderstorm WarningBOULogan, Washington10 min
Jun 14, 6:31 PM MDTSevere Thunderstorm WarningCYSCheyenne24 min
Jun 14, 6:34 PM MDTSevere Thunderstorm WarningCYSBanner, Morrill, Scotts Bluff39 min
Jun 14, 7:09 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Kimball, Morrill, Scotts Bluff66 min
Jun 14, 7:25 PM MDTSevere Thunderstorm WarningGLDKit Carson65 min
Jun 14, 7:53 PM MDTFlash Flood WarningCYSMorrill4 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 7.8 hours before the alert went out and 85 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2009-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 25 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2009-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
25 J/kg
Mixed-layer CIN
-225 J/kg
Mixed-layer LCL
1158 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 6:42 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 10 more63 min
Jun 13, 6:46 PM MDTMesoscale DiscussionSPCBaca, Bent, Kiowa, Prowers59 min
Jun 14, 12:03 AM MDTSevere Thunderstorm WatchSPCBaca, Prowers3 hr
Jun 14, 1:51 AM MDTMesoscale DiscussionSPCBaca, Prowers84 min
Jun 14, 12:05 PM MDTMesoscale DiscussionSPCBaca, Bent, Cheyenne, Crowley, Kiowa, Otero and 2 more85 min
Jun 14, 1:06 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 4 more54 min
Jun 14, 4:48 PM MDTMesoscale DiscussionSPCBent, Cheyenne, Crowley, Kiowa, Kit Carson, Lincoln and 5 more117 min
Jun 13, 7:58 PM MDTMesoscale DiscussionSPCBlaine, Brown, Cherry, Dawes, Grant, Hooker and 4 more62 min
Jun 14, 2:22 PM MDTMesoscale DiscussionSPCCrook, Weston83 min
Jun 14, 4:09 PM MDTSevere Thunderstorm WatchSPCCrook, Weston8 hr

Nearby

Tornado Watches in Colorado, 2009Tornado Watches in Nebraska, 2009Tornado Watches in Wyoming, 2009Every tornado watch 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.