Alert archive / Arkansas / Tornado Warnings in 1990

Tornado Warning 6, NWS Little Rock, AR

May 21, 1990Montgomery County, Arkansas

NWS Little Rock, AR issued this tornado warning at May 21, 1990, 1:24 AM CDT for Montgomery County, Arkansas. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
May 21, 1990, 1:24 AM CDT (06:24 UTC)
Expired
May 21, 1990, 2:30 AM CDT
In force
66 min
Issued by
NWS Little Rock, AR
Area
Whole counties

County Montgomery County, AR

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 00:00Z, 6.4 hours before the alert went out and 259 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, Longview/Gregg, TX at 00:00Z on 1990-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2312 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, Longview/Gregg, TX at 00:00Z on 1990-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 151 square meters per square second.193958Sfc1 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
2312 J/kg
Mixed-layer CIN
-235 J/kg
Mixed-layer LCL
1408 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
151 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLIT 210625
TORLIT
ARC097-210730-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LITTLE ROCK AR
124 AM CDT MON MAY 21 1990
 
THE NATIONAL WEATHER SERVICE IN LITTLE ROCK HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  230 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST ARKANSAS
 
   ...MONTGOMERY COUNTY
 
AT 122 AM CDT...RADAR INDICATED A POSSIBLE TORNADO 15 MILES
SOUTHWEST OF MT. IDA ARKANSAS...MOVING TO THE EAST AT 30 MPH.
 
IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE
INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR.  GET TO
A BASEMENT IF ONE IS AVAILABLE.  AVOID WINDOWS AND PROTECT YOUR
BODY FROM FLYING DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.
 
28

What forecasters said that day

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

In the hours before

Special weather statement, May 20, 10:38 PM CDT, 2 hours 46 minutes before
OKZ020-013-ARZ004-007-210445-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT SMITH AR
1037 PM CDT SUN MAY 20 1990

...THUNDERSTORMS HAVE RAPIDLY DEVELOPED OVER EAST CENTRAL AND
SOUTHEAST OKLAHOMA...

AT 1030 PM WEATHER SERVICE RADAR INDICATED A BROKEN LINE OF
THUNDERSTORMS FROM 5 MILES NORTH OF TALIHINA OKLAHOMA TO NORTHWEST
PUSHMATAHA COUNTY OKLAHOMA.  THESE STORMS ARE MOVING EAST AT 25 MPH.
THE STRONGEST STORM WAS 5 SOUTHEAST OF CLAYTON OKLAHOMA.

THE STRONGER THUNDERSTORMS WILL PRODUCE BRIEF HEAVY RAIN...SMALL HAIL
AND DANGEROUS LIGHTNING. PEOPLE IN EAST OKLAHOMA AND WEST ARKANSAS
SHOULD STAY ABREAST OF THE LATEST WEATHER INFORMATION AND LISTEN FOR
LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 20, 11:12 PM CDT, 2 hours 12 minutes before
ARZ001>011-015-210600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1112 PM CDT SUN MAY 20 1990

...SEVERE THUNDERSTORM WATCH FOR MOST OF CENTRAL AND WESTERN ARKANSAS...

A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MUCH OF CENTRAL AND
WESTERN ARKANSAS. THIS WATCH COVERS 47 COUNTIES AND WILL BE IN EFFECT
UNTIL 400 AM MONDAY MORNING.

SINCE 1000 PM...THUNDERSTORMS HAVE BEGUN TO DEVELOP RAPIDLY FROM
CENTRAL PORTIONS OF ARKANSAS THROUGH THE WESTERN PART OF THE STATE
INTO EASTERN OKLAHOMA.

THE AIR OVER ARKANSAS IS VERY MOIST AND UNSTABLE. AN AREA OF LOW
PRESSURE ALOFT IS APPROACHING FROM THE WEST AND HAS HELPED THE
THUNDERSTORMS TO DEVELOP QUICKLY.

THUNDERSTORMS ARE EXPECTED TO BECOME MORE NUMEROUS AND INCREASE IN
INTENSITY THE NEXT COUPLE OF HOURS.

28
Special weather statement, May 21, 12:10 AM CDT, 1 hour 14 minutes before
ARZ001>011-015-210700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1209 AM CDT MON MAY 21 1990

...THUNDERSTORMS CONTINUE TO DEVELOP IN ARKANSAS...

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 400 AM CDT FOR MOST OF
CENTRAL AND WESTERN ARKANSAS.

AT MIDNIGHT...THUNDERSTORMS WERE OCCURRING OVER SEVERAL PARTS OF THE
STATE. MOST OF THESE STORMS DEVELOPED DURING THE PAST COUPLE OF HOURS.

A LARGE AREA OF THUNDERSTORMS WAS LOCATED ALONG THE ARKANSAS-MISSOURI
BORDER FROM NEAR GRAVETTE EASTWARD TO BULL SHOALS LAKE. THE STRONGEST
STORM IN ARKANSAS WAS NEAR OMAHA...BUT STRONGER STORMS WERE JUST NORTH
OF THE BORDER IN MISSOURI.

IN NORTHEAST ARKANSAS...THUNDERSTORMS HAD DEVELOPED RAPIDLY FROM
MAMMOTH SPRING TO WALNUT RIDGE.

IN THE CENTRAL PART OF THE STATE...THUNDERSTORMS WERE OCCURRING FROM
LITTLE ROCK TO 10 MILES NORTH OF PINE BLUFF...AND FROM BENTON
ACROSS THE LITTLE ROCK AREA TO BEEBE.

SCATTERED THUNDERSTOARMS WERE ALSO OCCURRING FROM TEXARKANA TO
15 MILES SOUTH OF SHERIDAN.

FINALLY...THUNDERSTORMS WERE MOVING FROM EASTERN OKLAHOMA INTO
SCOTT AND POLK COUNTIES IN WESTERN ARKANSAS.

28

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 12:32 AM CDTSevere Thunderstorm WarningLZKRandolph43 min
May 21, 1:11 AM CDTSevere Thunderstorm WarningLZKMontgomery59 min
May 21, 2:22 AM CDTSevere Thunderstorm WarningLZKGarland, Hot Spring38 min
May 21, 2:29 AM CDTSevere Thunderstorm WarningLZKSaline61 min
May 21, 2:44 AM CDTSevere Thunderstorm WarningLZKPulaski61 min
May 21, 2:52 AM CDTSevere Thunderstorm WarningLZKGrant53 min
May 21, 3:52 AM CDTSevere Thunderstorm WarningLZKNewton38 min
May 21, 5:27 AM CDTSevere Thunderstorm WarningLZKPulaski63 min
May 21, 5:37 AM CDTSevere Thunderstorm WarningLZKLonoke68 min
May 21, 6:18 AM CDTSevere Thunderstorm WarningLZKJefferson42 min
May 21, 6:21 AM CDTSevere Thunderstorm WarningLZKArkansas69 min
May 21, 6:32 AM CDTSevere Thunderstorm WarningLZKCleveland, Lincoln58 min
May 21, 7:03 AM CDTSevere Thunderstorm WarningLZKDesha, Drew42 min
May 21, 8:50 AM CDTSevere Thunderstorm WarningLZKUnion40 min

Nearby

Tornado Warnings in Arkansas, 1990Every tornado warning in 1990Tornadoes in 1990

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.