Alert archive / Nebraska / Tornado Watches in 2009

Tornado Watch 332

June 5, 20094 states

The Storm Prediction Center issued this tornado watch at Jun 5, 2009, 2:48 PM MDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 5, 2009, 2:48 PM MDT (20:48 UTC)
Expired
Jun 5, 2009, 10:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 31 counties

Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Sherman County, KS, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Perkins 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 Cheyenne radar (KCYS), 82 km from the middle of the area, began a volume at 20:48 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
60%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
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
60%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 5, 3:06 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte54 min
Jun 5, 3:27 PM MDTTornado WarningCYSGoshen, Platte33 min
Jun 5, 3:49 PM MDTTornado WarningCYSGoshen26 min
Jun 5, 4:10 PM MDTTornado WarningCYSGoshen, Laramie35 min
Jun 5, 4:26 PM MDTSevere Thunderstorm WarningCYSNiobrara26 min
Jun 5, 4:38 PM MDTSevere Thunderstorm WarningCYSBox Butte, Dawes52 min
Jun 5, 4:42 PM MDTTornado WarningCYSBanner21 min
Jun 5, 4:55 PM MDTSevere Thunderstorm WarningCYSBox Butte65 min
Jun 5, 4:55 PM MDTSevere Thunderstorm WarningLBFSheridan50 min
Jun 5, 5:40 PM MDTTornado WarningCYSBanner35 min
Jun 5, 6:07 PM MDTSevere Thunderstorm WarningCYSMorrill53 min
Jun 5, 6:16 PM MDTSevere Thunderstorm WarningCYSBanner, Morrill22 min
Jun 5, 6:16 PM MDTTornado WarningLBFCherry, Grant44 min
Jun 5, 6:29 PM MDTSevere Thunderstorm WarningLBFGarden, Sheridan46 min
Jun 5, 6:54 PM MDTTornado WarningLBFGrant, Hooker36 min
Jun 5, 6:59 PM MDTTornado WarningLBFGarden, Grant46 min
Jun 5, 7:00 PM MDTSevere Thunderstorm WarningCYSMorrill45 min
Jun 5, 7:44 PM MDTSevere Thunderstorm WarningLBFArthur, Garden, Keith46 min
Jun 5, 7:45 PM MDTSevere Thunderstorm WarningCYSCheyenne, Morrill45 min
Jun 5, 8:05 PM MDTTornado WarningLBFGarden40 min
Jun 5, 8:41 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte49 min
Jun 5, 8:45 PM MDTTornado WarningLBFGarden45 min
Jun 5, 8:56 PM MDTSevere Thunderstorm WarningLBFArthur, Keith, Lincoln49 min
Jun 5, 9:28 PM MDTTornado WarningLBFDeuel, Garden, Keith47 min
Jun 5, 9:30 PM MDTSevere Thunderstorm WarningCYSGoshen35 min
Jun 5, 9:45 PM MDTTornado WarningLBFKeith, Lincoln45 min

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, 8.8 hours before the alert went out and 190 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 2009-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 997 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 2009-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.19395878Sfc1 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
997 J/kg
Mixed-layer CIN
-190 J/kg
Mixed-layer LCL
1029 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 5, 2:18 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Kit Carson, Logan, Morgan, Phillips and 3 more87 min
Jun 5, 5:37 PM MDTMesoscale DiscussionSPCKit Carson, Logan, Morgan, Phillips, Sedgwick, Washington and 2 more83 min
Jun 5, 2:58 PM MDTMesoscale DiscussionSPCMorton, Seward, Stevens62 min
Jun 5, 3:39 PM MDTSevere Thunderstorm WatchSPCClark, Ellis, Finney, Ford, Grant, Gray and 15 more9 hr
Jun 5, 5:06 PM MDTTornado WatchSPCArthur, Blaine, Brown, Chase, Cherry, Frontier and 10 more7 hr

Nearby

Tornado Watches in Nebraska, 2009Tornado Watches in Colorado, 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.