Alert archive / South Dakota / Tornado Watches in 2009

Tornado Watch 434

June 16, 20099 counties in North Dakota; 15 counties in South Dakota

The Storm Prediction Center issued this tornado watch at Jun 16, 2009, 2:05 PM CDT for 9 counties in North Dakota; 15 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 16, 2009, 2:05 PM CDT (19:05 UTC)
Expired
Jun 16, 2009, 8:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 24 counties

Burleigh County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Sioux County, ND, Brown County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Hamlin County, SD, Hand County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Spink County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 108 km from the middle of the area, began a volume at 19:07 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
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
20%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 16, 2:05 PM CDTTornado WarningABRHand40 min
Jun 16, 2:08 PM CDTTornado WarningABRFaulk37 min
Jun 16, 2:17 PM CDTSevere Thunderstorm WarningABRBrown, Spink58 min
Jun 16, 2:20 PM CDTSevere Thunderstorm WarningABRCampbell, Edmunds, McPherson, Walworth40 min
Jun 16, 2:27 PM CDTTornado WarningABRHand63 min
Jun 16, 2:29 PM CDTTornado WarningABRFaulk46 min
Jun 16, 2:40 PM CDTFlash Flood WarningABRBrown, Day, Spink5 hr
Jun 16, 2:58 PM CDTSevere Thunderstorm WarningABRHand, Spink30 min
Jun 16, 3:05 PM CDTTornado WarningABRHand55 min
Jun 16, 3:06 PM CDTTornado WarningABRFaulk19 min
Jun 16, 3:10 PM CDTSevere Thunderstorm WarningABRBrown, Spink44 min
Jun 16, 3:28 PM CDTSevere Thunderstorm WarningABRFaulk, Hand62 min
Jun 16, 3:38 PM CDTTornado WarningABRHand52 min
Jun 16, 3:48 PM CDTTornado WarningABRHand42 min
Jun 16, 3:52 PM CDTFlash Flood WarningABRBrown, Edmunds4 hr
Jun 16, 3:56 PM CDTSevere Thunderstorm WarningABRHand49 min
Jun 16, 4:21 PM CDTTornado WarningABRHand39 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 7.1 hours before the alert went out and 105 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, Bismarck Municip, ND at 12:00Z on 2009-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 416 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 12:00Z on 2009-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.193958Sfc1 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
416 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
553 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
115 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 16, 1:23 PM CDTMesoscale DiscussionSPCEmmons, Grant, Hettinger, Mercer, Morton, Oliver and 1 more97 min
Jun 16, 3:26 PM CDTMesoscale DiscussionSPCDickey, Emmons, Grant, LaMoure, Logan, McIntosh and 2 more64 min
Jun 16, 5:39 PM CDTMesoscale DiscussionSPCDickey, Emmons, Grant, LaMoure, Logan, McIntosh and 2 more96 min
Jun 16, 4:16 PM CDTTornado WatchSPCAurora, Beadle, Bon Homme, Brule, Charles Mix, Clay and 13 more7 hr

Nearby

Tornado Watches in South Dakota, 2009Tornado Watches in North Dakota, 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.