Alert archive / Arkansas / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 37

February 18, 200058 counties in Arkansas; Bolivar County, Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Feb 18, 2000, 5:00 AM CST for 58 counties in Arkansas; Bolivar County, Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Feb 18, 2000, 5:00 AM CST (11:00 UTC)
Expired
Feb 18, 2000, 11:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 59 counties

Arkansas County, AR, Baxter County, AR, Boone County, AR, Carroll County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Craighead County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sevier County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Bolivar County, MS

The radar

The Little Rock radar (KLZK), 42 km from the middle of the area, began a volume at 11:02 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Feb 18, 7:03 AM CSTSevere Thunderstorm WarningLZKYell37 min
Feb 18, 7:17 AM CSTSevere Thunderstorm WarningLZKMarion33 min
Feb 18, 10:29 AM CSTSevere Thunderstorm WarningLZKMontgomery46 min
Feb 18, 10:34 AM CSTSevere Thunderstorm WarningLZKYell36 min
Feb 18, 10:34 AM CSTSevere Thunderstorm WarningSHVLittle River41 min
Feb 18, 10:48 AM CSTSevere Thunderstorm WarningLZKConway, Pope47 min
Feb 18, 10:57 AM CSTSevere Thunderstorm WarningLZKGarland48 min

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 11.0 hours before the alert went out and 253 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-pSkew-T log-p diagram, Little Rock, AR at 00:00Z on 2000-02-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2000-02-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 487 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
464 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
487 m²/s²
0-3 km storm-relative helicity
525 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS9 KMKC 181034
MKC WW 181034
ARZ000-181700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 37
STORM PREDICTION CENTER NORMAN OK
434 AM CST FRI FEB 18 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   ARKANSAS                           

EFFECTIVE THIS FRIDAY MORNING FROM 500 AM UNTIL 1100 AM CST.

HAIL TO 1 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 100 STATUTE MILES
EAST AND WEST OF A LINE FROM 55 MILES SOUTHWEST OF PINE BLUFF
ARKANSAS TO 65 MILES WEST NORTHWEST OF WALNUT RIDGE ARKANSAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.


DISCUSSION...VERY STRONG LOW LEVEL JET ACROSS AR UP TO 70 KT AHEAD
OF COLD FRONT MOVING THRU CENTRAL OK.  WARM FRONT LIFTING RAPIDLY
NWD THRU CENTRAL AR WITH MOIST MARGINALLY UNSTABLE WARM SECTOR. 
STORMS DEVELOPING RAPIDLY VICINITY OK/AR BORDER IN LOW LEVEL
CONVERGENCE.  WITH APPROACH OF MID/UPR LEVEL JET MAX OF 80-100 KT
ACROSS OK/SRN KS...THE STORMS WILL QUICKLY DEVELOP DAMAGING WIND
POTENTIAL AS THEY INTENSIFY AND MOVE EWD ACROSS AR.  


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.  MEAN STORM
MOTION VECTOR 23050.


...HALES

;362,0901 333,0905 333,0942 362,0934f;

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 17, 9:45 PM CSTSevere Thunderstorm WatchSPCBenton, Carroll5 hr
Feb 18, 11:00 AM CSTTornado WatchSPCCalhoun, Clark, Cleburne, Cleveland, Columbia, Conway and 28 more5 hr
Feb 18, 2:00 PM CSTTornado WatchSPCArkansas, Clay, Craighead, Crittenden, Cross, Desha and 13 more5 hr
Feb 18, 5:30 PM CSTTornado WatchSPCAlcorn, Attala, Calhoun, Chickasaw, Choctaw, Clay and 14 more5 hr

Nearby

Severe Thunderstorm Watches in Arkansas, 2000Severe Thunderstorm Watches in Mississippi, 2000Every severe thunderstorm watch in 2000

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.