Alert archive / Arkansas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 607, NWS Little Rock, AR

August 11, 1999Stone County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Aug 11, 1999, 3:23 PM CDT for Stone County, Arkansas. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 11, 1999, 3:23 PM CDT (20:23 UTC)
Expired
Aug 11, 1999, 4:10 PM CDT
In force
47 min
Issued by
NWS Little Rock, AR
Area
Whole counties

County Stone County, AR

The radar

The Little Rock radar (KLZK), 114 km from the middle of the area, began a volume at 20:23 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.4 hours before the alert went out and 187 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, Springfield, MO at 12:00Z on 1999-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 30 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 12:00Z on 1999-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.1939Sfc1 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
30 J/kg
Mixed-layer CIN
-336 J/kg
Mixed-layer LCL
1746 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLIT 112022 RRA
SVRLIT
ARC137-112110-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LITTLE ROCK AR
323 PM CDT WED AUG 11 1999

THE NATIONAL WEATHER SERVICE IN LITTLE ROCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  STONE COUNTY IN NORTH CENTRAL ARKANSAS

* UNTIL 410 PM CDT

* AT 322 PM CDT... DOPPLER WEATHER RADAR INDICATED A SEVERE
  THUNDERSTORM 10 MILES SOUTH OF MOUNTAIN VIEW OR IN THE VICINITY OF
  PARMA... MOVING EAST AT 10 MPH.

THIS STORM IS EXPECTED TO REMAIN MOSTLY IN RURAL AREAS.

THE MAIN SEVERE WEATHER THREAT IN THE WARNING AREA IS STRONG AND GUSTY
WINDS. SOME WIND DAMAGE MAY OCCUR...SUCH AS DOWNED TREES OR TREE LIMBS
AND POWER LINES. THE STORM MAY ALSO PRODUCE HAIL IN SOME AREAS. FOR
YOUR PROTECTION...GO INDOORS UNTIL THE STORM PASSES.

34

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 10:30 AM CDT, 4 hours 53 minutes earlier.

Area forecast discussion, Aug 11, 10:30 AM CDT, 4 hours 53 minutes before
STATE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1030 AM CDT WED AUG 11 1999

RAISED MAX TEMPERATURES IN MOST AREAS THIS AFTERNOON DUE TO MORE
SUNSHINE THAN EXPECTED. ON 850 MB ANALYSIS THIS MORNING 24 DEG
ISOTHERM PERHAPS A LITTLE MORE PREVALENT ACROSS ARKANSAS COMPARED TO
YESTERDAY.  ALSO RAISED HEAT INDEX IN SOME AREAS..ALREADY 105 AT 10
AM THIS MORNING IN CENTRAL AREAS.

.LIT...HEAT ADVISORY THIS AFTERNOON/THURSDAY FOR MUCH OF
       CENTRAL/SOUTHERN ARKANSAS...ARZONES
       21-22-25-30>34-37>47-52>57-62>69

The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 11, 1:57 PM CDTSevere Thunderstorm WarningLZKSaline48 min
Aug 11, 2:47 PM CDTSevere Thunderstorm WarningLZKPulaski33 min
Aug 11, 2:55 PM CDTSevere Thunderstorm WarningLZKNewton35 min
Aug 11, 3:13 PM CDTSevere Thunderstorm WarningLZKSearcy47 min
Aug 11, 3:40 PM CDTSevere Thunderstorm WarningLZKPerry, Saline50 min
Aug 11, 3:55 PM CDTSevere Thunderstorm WarningLZKWhite45 min
Aug 11, 4:04 PM CDTSevere Thunderstorm WarningLZKSaline51 min
Aug 11, 4:16 PM CDTSevere Thunderstorm WarningLZKSearcy34 min
Aug 11, 4:25 PM CDTSevere Thunderstorm WarningLZKBaxter, Marion45 min
Aug 11, 4:26 PM CDTSevere Thunderstorm WarningLZKFaulkner64 min
Aug 11, 4:49 PM CDTFlash Flood WarningLZKSearcy2 hr
Aug 11, 4:59 PM CDTSevere Thunderstorm WarningLZKWhite46 min
Aug 11, 5:03 PM CDTSevere Thunderstorm WarningLZKConway, Pope62 min
Aug 11, 5:33 PM CDTSevere Thunderstorm WarningLZKFulton47 min
Aug 11, 5:49 PM CDTSevere Thunderstorm WarningLZKHot Spring51 min
Aug 11, 6:15 PM CDTSevere Thunderstorm WarningLZKGrant50 min
Aug 11, 6:27 PM CDTSevere Thunderstorm WarningLZKBoone48 min
Aug 11, 6:37 PM CDTSevere Thunderstorm WarningLZKHot Spring33 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1999Every severe thunderstorm warning in 1999

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.