Alert archive / Alabama / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 574, NWS Birmingham, AL

June 30, 1998DeKalb County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 30, 1998, 5:18 PM CDT for DeKalb County, Alabama. It was in force for 47 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 30, 1998, 5:18 PM CDT (22:18 UTC)
Expired: Jun 30, 1998, 6:05 PM CDT
In force: 47 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County DeKalb County, AL

What was reported inside it

Time	Report	Where	Remark
Jun 30, 5:31 PM CDT	Thunderstorm Wind 50	Ft Payne, AL	Trees and power lines were down just east of Fort Payne.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.3 hours before the alert went out and 168 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: 751 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1129 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: -35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

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

088 
WUUS1 KBHM 302219 RRA
SVRBHM
ALC049-302305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
518 PM CDT TUE JUN 30 1998

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DEKALB COUNTY... IN NORTHERN ALABAMA

* UNTIL 605 PM CDT

* AT 515 PM CDT... A SEVERE THUNDERSTORM WAS SHOWN...BY WEATHER RADAR
IN THE SOUTHERN PART OF DEKALB COUNTY...JUST WEST OF INTERSTATE 59
NEAR GERALDINE.  THE STORM WAS MOVING EAST SOUTHEAST AROUND 35 MPH...
AND WILL AFFECT THE FORT PAYNE AND COLLINSVILLE AREAS THROUGH 600 PM.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING
AND STAY AWAY FROM WINDOWS

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 5:36 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	64 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1998 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.