Alert archive / North Dakota / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 178
The Storm Prediction Center issued this severe thunderstorm watch at May 18, 2013, 11:49 PM CDT for Clay County, Norman County, Wilkin County, Minnesota; 8 counties in North Dakota. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 18, 2013, 11:49 PM CDT (04:49 UTC)
- Expired
- May 19, 2013, 4:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Clay County, MN, Norman County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Griggs County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 80 km from the middle of the area, began a volume at 04:51 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 4.8 hours before the alert went out and 225 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
- 43 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 2157 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 8:33 PM CDT | Mesoscale Discussion | SPC | Nobles, Rock | 117 min |
| May 18, 11:27 PM CDT | Mesoscale Discussion | SPC | Clay, Wilkin | 63 min |
| May 19, 2:32 AM CDT | Mesoscale Discussion | SPC | Clay, Norman, Wilkin | 88 min |
| May 19, 11:30 AM CDT | Mesoscale Discussion | SPC | Blue Earth, Brown, Carver, Dakota, Dodge, Faribault and 14 more | 90 min |
| May 19, 1:10 PM CDT | Tornado Watch | SPC | Anoka, Blue Earth, Brown, Carver, Chippewa, Chisago and 41 more | 8 hr |
| May 19, 5:04 PM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 53 more | 56 min |
| May 19, 5:25 PM CDT | Tornado Watch | SPC | Kanabec, Mille Lacs, Pine | 5 hr |
| May 18, 10:14 PM CDT | Mesoscale Discussion | SPC | Barnes, Burleigh, Dickey, Eddy, Emmons, Foster and 15 more | 61 min |
Nearby
Severe Thunderstorm Watches in North Dakota, 2013Severe Thunderstorm Watches in Minnesota, 2013Every severe thunderstorm watch in 2013
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.