Alert archive / Oklahoma / Tornado Watches in 2019
Tornado Watch 707
The Storm Prediction Center issued this tornado watch at Dec 28, 2019, 3:49 PM CST for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 28, 2019, 3:49 PM CST (21:49 UTC)
- Expired
- Dec 28, 2019, 10:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 53 counties
Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Howard County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Madison County, AR, Newton County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Washington County, AR, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Barry County, MO, Barton County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Greene County, MO, Hickory County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Adair County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Ottawa County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Wagoner County, OK
The radar
The Springfield radar (KSGF), 117 km from the middle of the area, began a volume at 21:51 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 28, 4:40 PM CST | Severe Thunderstorm Warning | SGF | Cherokee, Crawford | 50 min |
| Dec 28, 5:23 PM CST | Tornado Warning | SGF | Barton, Vernon | 14 min |
| Dec 28, 5:43 PM CST | Severe Thunderstorm Warning | SGF | Vernon | 17 min |
| Dec 28, 6:07 PM CST | Tornado Warning | SGF | Barton, Dade, Jasper | 38 min |
| Dec 28, 6:59 PM CST | Tornado Warning | SGF | Polk | 31 min |
| Dec 28, 7:54 PM CST | Severe Thunderstorm Warning | TSA | Franklin | 10 min |
| Dec 28, 7:57 PM CST | Severe Thunderstorm Warning | LZK | Johnson | 18 min |
| Dec 28, 9:28 PM CST | Severe Thunderstorm Warning | SGF | Douglas, Ozark, Taney | 47 min |
| Dec 28, 9:28 PM CST | Severe Thunderstorm Warning | SGF | Douglas, Ozark, Taney | 47 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
Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 68 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 446 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 321 m²/s²
- 0-3 km storm-relative helicity
- 312 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 |
|---|---|---|---|---|
| Dec 28, 3:06 PM CST | Mesoscale Discussion | SPC | Benton | 84 min |
| Dec 28, 4:45 PM CST | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Crawford, Franklin, Garland and 19 more | 90 min |
| Dec 28, 11:25 AM CST | Mesoscale Discussion | SPC | Chautauqua | 2 hr |
Nearby
Tornado Watches in Oklahoma, 2019Tornado Watches in Arkansas, 2019Tornado Watches in Missouri, 2019Every tornado watch in 2019
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.