Alert archive / Tennessee / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 237, NWS Memphis, TN

October 24, 2001McNairy County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Oct 24, 2001, 6:37 PM CDT for McNairy County, Tennessee. It was in force for 38 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: Oct 24, 2001, 6:37 PM CDT (23:37 UTC)
Expired: Oct 24, 2001, 7:15 PM CDT
In force: 38 min
Issued by: NWS Memphis, TN
Area: Whole counties; the outline is the Mesonet’s reconstruction

County McNairy County, TN

The radar

The Memphis radar (KNQA), 115 km from the middle of the area, began a volume at 23:39 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.

What was reported inside it

Time	Report	Where	Remark
Oct 24, 7:05 PM CDT	Thunderstorm Wind	Countywide, TN	Numerous trees were knocked down across the county.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Oct 24, 6:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.6 hours before the alert went out and 128 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: 753 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

434 
WUUS54 KMEG 242338
SVRMEM
TNC109-250015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
637 PM CDT WED OCT 24 2001

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MCNAIRY COUNTY IN SOUTHWEST TENNESSEE

* UNTIL 715 PM CDT.

* AT 634 PM CDT...WEATHER RADAR INDICATED A LINE OF SEVERE 
  THUNDERSTORMS JUST ENTERING NORTHWEST MCNAIRY COUNTY...MOVING EAST 
  AT 55 MPH.

* CITIES IN THE PATH OF THIS STORM THROUGH 715 PM CDT INCLUDE...
  BETHEL SPRINGS...SELMER...
  ADAMSVILLE...STANTONVILLE...

.THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER IN A STURDY BUILDING.

.A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...A
SEVERE THUNDERSTORM CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY.

.STAY TUNED TO THIS NATIONAL WEATHER SERVICE BROADCAST FOR THE LATEST
UPDATES AND INFORMATION.

LAT...LON 3528 8876 3505 8880 3503 8840 3541 8838
          3536 8861

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.

NWS Memphis, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 24, 3:40 PM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, Oct 24, 3:40 PM CDT, 2 hours 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
340 PM CDT WED OCT 24 2001

THE STRONG COLD FRONT CURRENTLY APPROACHING OUR NW COUNTIES WILL
MOVE THROUGH THE ENTIRE CWA FROM NOW THROUGH LATE EVENING. A LINE OF
TSTMS WILL FOLLOW THE FRONT FROM W TO E THROUGH THE EVENING. EXPECT
AN ABRUPT DROP IN TEMPS BEHIND THE FRONT LATER TNT.

THE REST OF THE FCST PERIOD LOOKS DRY WITH COOLER THAN NORMAL TEMPS.

PRELIM VALUES
MEM 47/63/38/63 5000
MKL 44/60/33/60 8000
JBR 43/61/35/62 1000
TUP 49/65/36/62 5000

.MEG...WIND ADVISORY ALLOWED TO EXPIRE.

012

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 24, 4:40 PM CDT	Severe Thunderstorm Warning	MEG	Lake	35 min
Oct 24, 4:52 PM CDT	Severe Thunderstorm Warning	MEG	Dyer	38 min
Oct 24, 4:58 PM CDT	Severe Thunderstorm Warning	MEG	Lauderdale, Tipton	47 min
Oct 24, 5:09 PM CDT	Severe Thunderstorm Warning	MEG	Obion, Weakley	51 min
Oct 24, 5:12 PM CDT	Severe Thunderstorm Warning	MEG	Shelby	63 min
Oct 24, 5:19 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Gibson	41 min
Oct 24, 5:19 PM CDT	Severe Thunderstorm Warning	MEG	Haywood	41 min
Oct 24, 5:40 PM CDT	Severe Thunderstorm Warning	MEG	Fayette	50 min
Oct 24, 5:55 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Madison	50 min
Oct 24, 5:55 PM CDT	Severe Thunderstorm Warning	MEG	Haywood	50 min
Oct 24, 6:01 PM CDT	Severe Thunderstorm Warning	MEG	Henry	29 min
Oct 24, 6:06 PM CDT	Severe Thunderstorm Warning	MEG	Hardeman	39 min
Oct 24, 6:21 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Henderson	39 min
Oct 24, 6:47 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Hardin	43 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2001 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.