Alert archive / Nebraska / Tornado Watches in 2015
Tornado Watch 127
The Storm Prediction Center issued this tornado watch at May 3, 2015, 9:13 PM CDT for 4 counties in Kansas; 4 counties in Missouri; 5 counties in Nebraska. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- May 3, 2015, 9:13 PM CDT (02:13 UTC)
- Expired
- May 3, 2015, 11:11 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Brown County, KS, Doniphan County, KS, Marshall County, KS, Nemaha County, KS, Andrew County, MO, Atchison County, MO, Holt County, MO, Nodaway County, MO, Gage County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE
The radar
The Topeka radar (KTWX), 125 km from the middle of the area, began a volume at 02:14 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 9:29 PM CDT | Severe Thunderstorm Warning | OAX | Johnson, Nemaha, Pawnee | 46 min |
| May 3, 9:31 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha | 29 min |
| May 3, 10:06 PM CDT | Severe Thunderstorm Warning | OAX | Johnson, Nemaha | 24 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
Topeka, KS (KFOE), launched 00:00Z, 2.2 hours before the alert went out and 121 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
- 590 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 2450 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:06 PM CDT | Mesoscale Discussion | SPC | Nemaha | 84 min |
| May 4, 2:56 PM CDT | Mesoscale Discussion | SPC | Atchison, Barton, Brown, Clay, Cloud, Dickinson and 44 more | 2 hr |
| May 4, 3:26 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Barton, Brown, Clay, Cloud, Dickinson and 26 more | 6 hr |
| May 4, 6:30 PM CDT | Mesoscale Discussion | SPC | Atchison, Barton, Brown, Clay, Cloud, Dickinson and 33 more | 90 min |
| May 3, 10:22 PM CDT | Mesoscale Discussion | SPC | Atchison, Holt, Nodaway | 83 min |
Nearby
Tornado Watches in Nebraska, 2015Tornado Watches in Kansas, 2015Tornado Watches in Missouri, 2015Every tornado watch in 2015
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.