Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 5, NWS Nashville, TN

February 22, 2003Macon County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Feb 22, 2003, 12:22 PM CST for Macon County, Tennessee. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Feb 22, 2003, 12:22 PM CST (18:22 UTC)
Expired: Feb 22, 2003, 12:45 PM CST
In force: 23 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

County Macon County, TN

The radar

The Nashville radar (KOHX), 85 km from the middle of the area, began a volume at 18:22 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 22, 10:35 AM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.4 hours before the alert went out and 94 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: 546 m above ground
0-6 km bulk shear: 90 kt
0-1 km storm-relative helicity: 250 m²/s²
0-3 km storm-relative helicity: 248 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.

196 
WUUS54 KOHX 221822
SVRBNA
TNC111-221845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1221 PM CST SAT FEB 22 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACON COUNTY IN TENNESSEE

* UNTIL 1245 PM CST

* AT 1217 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTHEAST OF LAFAYETTE...MOVING        
  NORTHEAST AT 55 MPH.

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO WARNING. IF
SEVERE THUNDERSTORMS APPROACH YOUR AREA...GO TO A SAFE PLACE.
ESPECIALLY IF YOU LIVE IN A MOBILE HOME.
&&
LAT...LON 3662 8550 3655 8550 3652 8563 3646 8572
          3652 8604 3662 8602 3661 8565
$$
ROSE

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 Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 22, 11:00 AM CST, 1 hour 22 minutes earlier.

Area forecast discussion, Feb 22, 11:00 AM CST, 1 hour 22 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
1100 AM CST SAT FEB 22 2003

THERE HAS BEEN SOME CLOUD BREAKS IN THE WARM SECTOR IN SOUTHERN
MIDDLE TENNESSEE BY LATE MORNING...ALLOWING TEMPERATURES TO WARM
INTO THE 60S...UPDATE ONE. THIS GROWING INSTABILITITY LOOKS TO
ENHANCE STORMS FIRING ALONG AN EARLIER BOUNDARY IN MORE STABLE AIR
TO THE WEST...UPDATE TWO.  TORNADO WATCH IN EFFECT FOR THE EASTERN
FORECAST AREA (MACON SOUTH TO FRANKLIN COUNTIES OF TENNESSEE...THEN
EAST). JUST WEST OF THE WATCH BOX...THERE COULD BE SOME HAIL REPORTS
TOO...MAINLY EARLY THIS AFTERNOON.

04

.BNA...TORNADO WATCH FOR EASTERN MIDDLE TENNESSEE UNTIL 4 PM
TNC015-027-031-035-041-049-051-061-087-111-133-137-141-159-175-177-18 5
FLOOD WATCH THIS AFTERNOON FOR MIDDLE TENNESSEE

Hazardous weather outlook, Feb 22, 5:30 AM CST, 6 hours 52 minutes before

TNZ005>011-022>034-056>066-075>080-093>097-231130-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CST SAT FEB 22 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

...FLOOD WATCH TODAY...

SHOWERS AND SCATTERED THUNDERSTORMS ARE EXPECTED TODAY. THUNDERSTORMS
ARE EXPECTED MAINLY THROUGH MIDDAY AS A COLD FRONT MOVES ACROSS THE
AREA. THUNDERSTORMS MAY PRODUCE FLOODING TYPE RAINS...AND POSSIBLE
EVEN STRONG TO DAMAGING WIND ACROSS THE SOUTH. SHOWERS ACROSS THE
AREA TONIGHT HAVE A GOOD CHANCE OF MIXING WITH OR CHANGING BRIEFLY
TO SNOW. NO SIGNIFICANT ACCUMULATION IS EXPECTED AT THIS TIME. FLASH
AND RIVER FLOODING CONTINUES TO BE THE MAIN CONCERN THROUGH THIS
EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SEVERAL WEAK WEATHER SYSTEMS WILL PUSH ACROSS THE AREA OVER THE NEXT
SEVERAL DAYS...WITH THUNDERSTORMS POSSIBLE THURSDAY. THE PROBABILITY
OF HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY FOR POSSIBLE HEAVY RAIN AND
ISOLATED STRONG THUNDERSTORMS. THE THREAT OF ADDITIONAL EXCESSIVE
RAINFALL IS THE BIGGEST CONCERN DUE SATURATED GROUND AND ABOVE NORMAL
RIVER LEVELS.

07

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 22, 2:34 AM CST	Flash Flood Warning	OHX	Franklin	116 min
Feb 22, 10:33 AM CST	Severe Thunderstorm Warning	OHX	Rutherford	57 min
Feb 22, 10:51 AM CST	Severe Thunderstorm Warning	OHX	Coffee	39 min
Feb 22, 10:59 AM CST	Severe Thunderstorm Warning	OHX	Smith, Wilson	46 min
Feb 22, 11:35 AM CST	Severe Thunderstorm Warning	OHX	Warren, White	40 min
Feb 22, 2:38 PM CST	Flash Flood Warning	OHX	Cumberland	3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2003 Every severe thunderstorm warning in 2003

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.