Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 241, NWS Jackson, MS

May 9, 1998Washington County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 9, 1998, 2:04 PM CDT for Washington County, Mississippi. It was in force for 31 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
May 9, 1998, 2:04 PM CDT (19:04 UTC)
Expired
May 9, 1998, 2:35 PM CDT
In force
31 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Washington County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.1 hours before the alert went out and 134 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, Jackson, MS at 12:00Z on 1998-05-09Temperature 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, Jackson, MS at 12:00Z on 1998-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 303 square meters per square second.1939587897Sfc1 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
2055 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
303 m²/s²
0-3 km storm-relative helicity
533 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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.

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.

In the hours before

Special weather statement, May 9, 10:20 AM CDT, 3 hours 44 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>029-032>066-072>
074-100400-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
1020 AM CDT SAT MAY 9 1998

...THERE IS A THREAT SEVERE THUNDERSTORMS AND TORNDOES OVER NORTHERN
MISSISSIPPI AND THE SOUTHEAST CORNER OF ARKANSAS THIS AFTERNOON AND
EVENING...

A LOW PRESSURE CENTER WILL MOVE EAST ACROSS SOUTH ARKANSAS AND NORTH
MISSISSIPPI THIS AFTERNOON AND EVENING.  MOISTURE IS EXPECTED TO BE
CONCENTRATED ALONG AND NORTH OF A WARM FRONT THAT WILL EXTEND SOUTHEAST
OR EAST FROM THE LOW.  MOISTURE THAT WILL LIFT OVER THE FRONT WILL
PRODUCE STRONG TO SEVERE THUNDERSTORMS FROM THE ARKANSAS / LOUISIANA
BORDER AREA OF NORTHEAST LOUISIANA AND ACROSS NORTHERN MISSISIPPI NORTH
OF YAZOO CITY TO PHILADELPHIA.  AS THE LOW APPROACHES...LOW LEVEL
SOUTHERLY WINDS WILL INCREASE AT THE SAME TIME STRONG UPPER LEVEL
WINDS IN A JET STREAM WILL BE OVER THE AREA. THESE STRONG AND TURNING
WINDS WILL PRODUCE CONDITIONS THAT COULD CAUSE TORNADOES ACROSS THE
SAME AREA.

IT WILL PROBABLY BE NECESSARY TO REQIEST THE ASSISTANCE OF STORM
SPOTTERS...HAM RADIO OPERATORS...AND PUBLIC SAFETY OFFICIALS IN
SEVERE WEATHER DETECTION AND WARNING LATER THIS AFTERNOON AND
THIS EVNING.

FOR MORE INFORMATION VISIT OUR WEB SITE AT:
HTTP://WWW.JANNWS.STATE.MS.US             /IN LOWER CASE LETTERS/
Special weather statement, May 9, 10:20 AM CDT, 3 hours 44 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>029-032>066-072>
074-100400-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
1020 AM CDT SAT MAY 9 1998

...THERE IS A THREAT SEVERE THUNDERSTORMS AND TORNDOES OVER NORTHERN
MISSISSIPPI AND THE SOUTHEAST CORNER OF ARKANSAS THIS AFTERNOON AND
EVENING...

A LOW PRESSURE CENTER WILL MOVE EAST ACROSS SOUTH ARKANSAS AND NORTH
MISSISSIPPI THIS AFTERNOON AND EVENING.  MOISTURE IS EXPECTED TO BE
CONCENTRATED ALONG AND NORTH OF A WARM FRONT THAT WILL EXTEND SOUTHEAST
OR EAST FROM THE LOW.  MOISTURE THAT WILL LIFT OVER THE FRONT WILL
PRODUCE STRONG TO SEVERE THUNDERSTORMS FROM THE ARKANSAS / LOUISIANA
BORDER AREA OF NORTHEAST LOUISIANA AND ACROSS NORTHERN MISSISIPPI NORTH
OF YAZOO CITY TO PHILADELPHIA.  AS THE LOW APPROACHES...LOW LEVEL
SOUTHERLY WINDS WILL INCREASE AT THE SAME TIME STRONG UPPER LEVEL
WINDS IN A JET STREAM WILL BE OVER THE AREA. THESE STRONG AND TURNING
WINDS WILL PRODUCE CONDITIONS THAT COULD CAUSE TORNADOES ACROSS THE
SAME AREA.

IT WILL PROBABLY BE NECESSARY TO REQIEST THE ASSISTANCE OF STORM
SPOTTERS...HAM RADIO OPERATORS...AND PUBLIC SAFETY OFFICIALS IN
SEVERE WEATHER DETECTION AND WARNING LATER THIS AFTERNOON AND
THIS EVNING.

FOR MORE INFORMATION VISIT OUR WEB SITE AT:
HTTP://WWW.JANNWS.STATE.MS.US             /IN LOWER CASE LETTERS/

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 9, 2:35 PM CDTSevere Thunderstorm WarningJANWashington35 min
May 9, 3:58 PM CDTSevere Thunderstorm WarningJANCarroll, Holmes32 min
May 9, 5:11 PM CDTSevere Thunderstorm WarningJANAttala, Choctaw, Montgomery49 min
May 9, 5:31 PM CDTTornado WarningJANAttala, Choctaw34 min
May 9, 5:56 PM CDTTornado WarningJANOktibbeha34 min
May 9, 6:10 PM CDTTornado WarningJANWinston20 min
May 9, 6:17 PM CDTTornado WarningJANNoxubee33 min
May 9, 6:32 PM CDTSevere Thunderstorm WarningJANWinston33 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1998Every severe thunderstorm warning in 1998

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.