Alert archive / Arkansas / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 7
The Storm Prediction Center issued this severe thunderstorm watch at Mar 10, 2018, 3:43 PM CST for 36 counties in Arkansas; 6 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 10, 2018, 3:43 PM CST (21:43 UTC)
- Expired
- Mar 10, 2018, 10:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 42 counties
Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Conway County, AR, Crawford County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Johnson County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Monroe County, AR, Montgomery County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Yell County, AR, Adair County, OK, Cherokee County, OK, LeFlore County, OK, Muskogee County, OK, Sequoyah County, OK, Wagoner County, OK
The radar
The Western Arkansas radar (KSRX), 78 km from the middle of the area, began a volume at 21:47 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
- 10%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 10, 3:48 PM CST | Severe Thunderstorm Warning | TSA | Crawford | 27 min |
| Mar 10, 4:12 PM CST | Severe Thunderstorm Warning | TSA | Crawford | 33 min |
| Mar 10, 4:42 PM CST | Severe Thunderstorm Warning | TSA | Crawford, Franklin, Sebastian | 33 min |
| Mar 10, 5:03 PM CST | Severe Thunderstorm Warning | TSA | Franklin | 42 min |
| Mar 10, 5:04 PM CST | Severe Thunderstorm Warning | LZK | Logan | 41 min |
| Mar 10, 5:09 PM CST | Severe Thunderstorm Warning | TSA | Franklin | 36 min |
| Mar 10, 5:17 PM CST | Severe Thunderstorm Warning | TSA | Crawford | 28 min |
| Mar 10, 5:41 PM CST | Severe Thunderstorm Warning | LZK | Johnson, Logan, Pope, Yell | 49 min |
| Mar 10, 5:45 PM CST | Severe Thunderstorm Warning | TSA | Crawford, Franklin, Sebastian | 11 min |
| Mar 10, 5:54 PM CST | Severe Thunderstorm Warning | LZK | Conway, Perry, Pope | 51 min |
| Mar 10, 6:17 PM CST | Severe Thunderstorm Warning | LZK | Conway, Garland, Perry, Saline, Yell | 43 min |
| Mar 10, 6:41 PM CST | Severe Thunderstorm Warning | LZK | Conway, Faulkner, Perry | 49 min |
| Mar 10, 6:52 PM CST | Severe Thunderstorm Warning | LZK | Garland, Perry, Pulaski, Saline | 53 min |
| Mar 10, 6:58 PM CST | Severe Thunderstorm Warning | TSA | Cherokee, Wagoner | 32 min |
| Mar 10, 7:24 PM CST | Severe Thunderstorm Warning | LZK | Garland, Grant, Hot Spring, Jefferson, Lonoke, Pulaski and 1 more | 51 min |
| Mar 10, 7:25 PM CST | Severe Thunderstorm Warning | TSA | Cherokee | 35 min |
| Mar 10, 7:38 PM CST | Severe Thunderstorm Warning | LZK | Lonoke, Pulaski, Saline | 37 min |
| Mar 10, 7:57 PM CST | Severe Thunderstorm Warning | TSA | Cherokee | 33 min |
| Mar 10, 8:00 PM CST | Severe Thunderstorm Warning | LZK | Cleveland, Lincoln | 45 min |
| Mar 10, 8:01 PM CST | Severe Thunderstorm Warning | LZK | Jefferson, Lincoln | 44 min |
| Mar 10, 8:11 PM CST | Severe Thunderstorm Warning | LZK | Lonoke, Pulaski | 32 min |
| Mar 10, 8:15 PM CST | Severe Thunderstorm Warning | LZK | Desha | 45 min |
| Mar 10, 8:42 PM CST | Severe Thunderstorm Warning | LZK | Cleveland, Desha, Drew, Grant, Jefferson, Lincoln | 48 min |
| Mar 10, 8:59 PM CST | Severe Thunderstorm Warning | LZK | Desha, Drew | 46 min |
| Mar 10, 9:25 PM CST | Severe Thunderstorm Warning | LZK | Cleveland, Drew, Lincoln | 50 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, 9.7 hours before the alert went out and 200 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
- 1807 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 116 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 |
|---|---|---|---|---|
| Mar 10, 3:11 PM CST | Mesoscale Discussion | SPC | Clark, Cleveland, Conway, Crawford, Dallas, Faulkner and 20 more | 3 hr |
| Mar 10, 5:57 PM CST | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Chicot, Clark, Cleveland and 34 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Arkansas, 2018Severe Thunderstorm Watches in Oklahoma, 2018Every severe thunderstorm watch in 2018
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.