Alert archive / Alabama / Tornado Warnings in 2001

Tornado Warning 40, NWS Birmingham, AL

May 28, 2001Calhoun County, Alabama

NWS Birmingham, AL issued this tornado warning at May 28, 2001, 8:11 PM CDT for Calhoun County, Alabama. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 28, 2001, 8:11 PM CDT (01:11 UTC)
Expired: May 28, 2001, 9:00 PM CDT
In force: 49 min
Issued by: NWS Birmingham, AL
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Calhoun County, AL

The radar

The Northeast Alabama radar (KHTX), 119 km from the middle of the area, began a volume at 01:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 28, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.2 hours before the alert went out and 126 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: 1324 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1211 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KBMX 290111
TORBHM
ALC015-290200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
811 PM CDT MON MAY 28 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  CALHOUN COUNTY IN EAST CENTRAL ALABAMA

* UNTIL 900 PM CDT

* AT 811 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  DEVELOPING TORNADO 14 MILES WEST OF PIEDMONT...MOVING SOUTHEAST AT 
  20 MPH.

* LOCATIONS NEAR THE PATH OF THIS TORNADO INCLUDE...PIEDMONT.

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS. TAKE COVER NOW. IF YOU
WAIT UNTIL YOU CAN SEE OR HEAR IT COMING...IT MAY BE TOO LATE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 gPM CDT MONDAY
EVENING FOR ALABAMA.

LAT...LON 3395 8576 3390 8594 3377 8565 3393 8553
          3396 8571

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:01 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, St. Clair	29 min
May 28, 7:14 PM CDT	Severe Thunderstorm Warning	BMX	Perry	61 min
May 28, 7:18 PM CDT	Tornado Warning	BMX	Cherokee, DeKalb	27 min
May 28, 7:22 PM CDT	Tornado Warning	BMX	Jefferson	23 min
May 28, 7:27 PM CDT	Severe Thunderstorm Warning	BMX	Blount, St. Clair	48 min
May 28, 7:31 PM CDT	Tornado Warning	BMX	Shelby	29 min
May 28, 7:33 PM CDT	Severe Thunderstorm Warning	BMX	Bibb	42 min
May 28, 7:38 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	52 min
May 28, 7:38 PM CDT	Tornado Warning	BMX	Perry	37 min
May 28, 7:47 PM CDT	Flash Flood Warning	BMX	DeKalb	3 hr
May 28, 7:48 PM CDT	Tornado Warning	BMX	Etowah	42 min
May 28, 8:12 PM CDT	Severe Thunderstorm Warning	BMX	Shelby	48 min
May 28, 8:12 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	33 min
May 28, 8:17 PM CDT	Severe Thunderstorm Warning	BMX	Chilton	43 min

Nearby

Tornado Warnings in Alabama, 2001 Every tornado warning in 2001 Tornadoes in 2001

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; radar from the NEXRAD Level II archive.