Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 160, NWS Birmingham, AL

October 4, 1990Jefferson County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Oct 4, 1990, 8:13 AM CDT for Jefferson County, Alabama. It was in force for 47 min.

The area

The counties it named.

The facts

Issued: Oct 4, 1990, 8:13 AM CDT (13:13 UTC)
Expired: Oct 4, 1990, 9:00 AM CDT
In force: 47 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County Jefferson County, AL

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

Centreville/Bibb, AL (KCKL), launched 12:00Z, 1.2 hours before the alert went out and 78 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: NaN m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.2

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, Oct 4, 6:41 AM CDT, 1 hour 32 minutes before

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Special weather statement, Oct 4, 7:24 AM CDT, 49 minutes before

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Local storm report, Oct 4, 7:48 AM CDT, 25 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 4, 5:50 AM CDT	Tornado Warning	BMX	Marion	40 min
Oct 4, 7:59 AM CDT	Tornado Warning	BMX	Pickens	46 min
Oct 4, 8:06 AM CDT	Tornado Warning	BMX	Tuscaloosa	54 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1990 Every severe thunderstorm warning 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.