Alert archive / Arkansas / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 18

February 9, 200123 counties in Arkansas

The Storm Prediction Center issued this severe thunderstorm watch at Feb 9, 2001, 5:30 AM CST for 23 counties in Arkansas. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Feb 9, 2001, 5:30 AM CST (11:30 UTC)
Expired: Feb 9, 2001, 9:00 AM CST
In force: 4 hr
Issued by: the Storm Prediction Center

All 23 counties

Baxter County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Conway County, AR, Faulkner County, AR, Fulton County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Feb 9, 5:43 AM CST	Severe Thunderstorm Warning	TSA	Carroll, Madison	32 min
Feb 9, 5:58 AM CST	Severe Thunderstorm Warning	LZK	Johnson	32 min
Feb 9, 6:10 AM CST	Severe Thunderstorm Warning	LZK	Newton	35 min
Feb 9, 6:16 AM CST	Severe Thunderstorm Warning	LZK	Boone	29 min
Feb 9, 6:34 AM CST	Severe Thunderstorm Warning	LZK	Johnson, Logan, Pope	41 min
Feb 9, 6:56 AM CST	Severe Thunderstorm Warning	LZK	Marion, Searcy	49 min

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 11.5 hours before the alert went out and 170 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 69 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 556 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 362 m²/s²
0-3 km storm-relative helicity: 399 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 9, 2:45 AM CST	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Polk and 3 more	4 hr

Nearby

Severe Thunderstorm Watches in Arkansas, 2001 Every severe thunderstorm watch in 2001

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.