Alert archive / Alabama / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 47, NWS Mobile, AL

July 28, 1987Houston County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 28, 1987, 2:43 PM CDT for Houston County, Alabama. It was in force for 62 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: Jul 28, 1987, 2:43 PM CDT (19:43 UTC)
Expired: Jul 28, 1987, 3:45 PM CDT
In force: 62 min
Issued by: NWS Mobile, AL
Area: Whole counties

County Houston County, AL

The radar

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

What was reported inside it

Time	Report	Where	Remark
Jul 28, 3:15 PM CDT	Thunderstorm Wind 0	Houston, AL

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 7.7 hours before the alert went out and 137 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: 3203 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 51 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 KMGM 281943
SVRMGM
ALC069-282045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
243 PM CDT TUE JUL 28 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  345 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH ALABAMA
          ...HOUSTON
 
AT 245 PM CDT RADAR SHOWED A SEVERE THUNDERSTORM JUST SOUTHEAST OF
HEADLAND ALONG THE HOUSTON HENRY COUNTY LINE MOVING TOWARD THE SOUTH
AT 15 MPH.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 2:35 PM CDT	Severe Thunderstorm Warning	MOB	Dale	55 min
Jul 28, 3:00 PM CDT	Severe Thunderstorm Warning	MOB	Geneva	60 min
Jul 28, 3:00 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin	60 min
Jul 28, 4:25 PM CDT	Severe Thunderstorm Warning	MOB	Escambia	50 min
Jul 28, 4:35 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	55 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1987 Every severe thunderstorm warning in 1987

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.