Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 289, NWS Morristown, TN

July 13, 2003Monroe County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 13, 2003, 7:44 PM EDT for Monroe County, Tennessee. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 13, 2003, 7:44 PM EDT (23:44 UTC)
Expired: Jul 13, 2003, 8:30 PM EDT
In force: 46 min
Issued by: NWS Morristown, TN
Area: Counties, with a storm outline in the text

County Monroe County, TN

The radar

The Knoxville radar (KMRX), 111 km from the middle of the area, began a volume at 23:46 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
Jul 13, 4:05 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.7 hours before the alert went out and 225 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: 1439 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

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 Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 3:00 PM EDT, 4 hours 44 minutes earlier.

Area forecast discussion, Jul 13, 3:00 PM EDT, 4 hours 44 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
300 PM EDT SUN JUL 13 2003

THE FOLLOWING ARE ALL THE FORECAST DISCUSSIONS FROM THE PAST 24
HOURS...WITH THE MOST RECENT ON TOP. THIS PROVIDES A HISTORY OF THE
DEVELOPMENT OF THE CURRENT FORECAST.

********************************************************************
AFTERNOON FORECAST DISCUSSION
300 PM EDT SUN JUL 13 2003

TONIGHT AND TOMORROW...PERSISTENT UPPER TROUGH OVER THE EASTERN
CONUS REMAINS MOST SIGNIFICANT FEATURE FOR OUR REGION. UPPER RIDGE
REMAINS ANCHORED OVER THE ROCKY MOUNTAIN REGION. TROUGH AXIS IS
PROJECTED TO REMAIN WEST OF THE FORECAST AREA THROUGH MID-DAY MONDAY
AT WHICH TIME THE WESTERN RIDGE BUILDS EASTWARD. EXPECT PRECIP
CHANCES TO DIMINISH AS TROUGH AXIS AND SURFACE BOUNDARY PUSH OUT OF
OUR AREA.

LONGER TERM...WITH UPPER TROUGH PULLING OUT...SHOULD BE ENOUGH
WARMING ALOFT TO DIMINISH THE AMOUNT OF SHOWER AND THUNDERSTORM
ACTIVITY FOR TUESDAY AND BEYOND. HOWEVER...STILL MAY BE ENOUGH ENOUGH
MOISTURE AND INSTABILITY FOR SLIGHT CHANCE TO LOW CHANCE POPS FOR
AFTERNOON AND EVENING CONVECTION.  TIMING OF ANY WEAK FEATURES THAT
WILL AFFECT THE REGION NEXT SEVERAL DAYS IS DIFFICULT.  FOR NOW WILL
GO WITH 20 TO 30 POPS EACH AFTERNOON AND EVENING THROUGH NEXT
SUNDAY.

PRELIMINARY NUMBERS FOLLOW:
CHA   67  88  69  91 /  50  30  20  20
TYS   65  86  67  89 /  40  30  20  20
TRI   62  84  63  87 /  30  30  20  20
OQT   65  86  67  89 /  40  30  20  20

.MRX...
NC...NONE.
TN...NONE.
VA...NONE.

********************************************************************
LATE MORNING FORECAST DISCUSSION (UPDATE)
1000 AM EDT SUN JUL 13 2003

NO CHANGES TO LAST UPDATE. FORECAST...INCLUDING TEMPS PER LAMP
DATA...APPEARS ON TRACK.

LCM

*********************************************************************
FORECAST DISCUSSION
725 AM EDT SUN JUL 13 2003

WITH BOUNDARY LAYING ACROSS SOUTHERN PORTION OF FORECAST AREA...AND
ONGOING CONVECTION...WILL UPDATE FORECAST TO INCREASE TO LIKELY POPS
ACROSS SOUTHERN PORTION OF CWA AND MOUNTAIN ZONES.

*********************************************************************
EARLY MORNING FORECAST DISCUSSION
315 AM EDT SUN JUL 13 2003

NORTHWEST FLOW ALOFT CONTINUES TODAY WITH ANOTHER SERIES OF
SHORTWAVES SWINGING THROUGH THE FLOW.  WEAK SURFACE BOUNDARY WILL BE
DRIFTING SLOWLY SOUTHWARD WILL CREATE A REPEAT OF YESTERDAYS
THUNDERSTORM ACTIVITY.  INCREASING POPS TODAY TO HIGH CHANCE...40 TO
50 RANGE... WITH HIGHEST OVER MOUNTAINS AND SOUTHEAST.

MONDAY AND BEYOND...HIGH PRESSURE WILL RETURN TO DOMINATE THE
WEATHER WITH TYPICAL AFTERNOON AND EVENING THUNDERSTORM ACTIVITY AND
GRADUALLY WARMING TEMPERATURES.

FOR COORDINATION PURPOSES ONLY
CHA   86  66  88  68 /  50  50  30  30
TYS   84  65  85  66 /  40  50  20  20
TRI   81  62  82  62 /  40  50  20  20
OQT   83  65  86  66 /  40  50  20  20

********************************************************************
EVENING FORECAST DISCUSSION (UPDATE)
900 PM EDT SAT JUL 12 2003

SVR CONVECTION HAS WEAKEND OR EXITED FA THIS EVENING. A FEW TSRA
CONTINUE NEAR THE SMOKY MTNS HEADING E. UPDATED TO REMOVE TSTM
WATCHES FOR SW VA AND MUCH OF E TN/SW VA. WIDELY SCATTERED SHRA/TSRA
IS OCCURRING ACROSS W/MID TN IN ASSOCIATION WITH WEAK FNT AS ENERGY
CONTINUES TO ROTATE SE ARND NERN U.S. UPR TROF. WILL KEEP SLGT CHC
POP GOING AS ISOLD TO WIDELY SCT SHRA/TSRA COULD BUILD INTO FA AFTER
MIDNITE.

********************************************************************
LATE AFTERNOON FORECAST DISCUSSION
525 PM EDT SAT JUL 12 2003

UDPATED FCST TO INCLUDE NEW THUNDESTORM WATCH FOR SW VA COUNTIES AND
RAISED POP MOST ZONES AS UPR TROF BUILDS SE THRU FA.

Hazardous weather outlook, Jul 13, 7:42 AM EDT, 12 hours 2 minutes before

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005-
006-008-132045-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
700 AM EDT SUN JUL 13 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
VIRGINIA...EAST TENNESSEE AND SOUTHWEST NORTH CAROLINA.

.DAY ONE (TODAY)...
A FRONTAL BOUNDARY REMAINS OVER THE SOUTHERN TENNESSEE VALLEY TODAY.
AN UPPER LEVER DISTURBANCE WILL MOVE INTO THE AREA FROM THE
NORTHWEST THIS AFTERNOON. THUNDERSTORMS WILL DEVELOP ALONG THE
FRONTAL BOUNDARY AND MOVE TO THE EAST THROUGHOUT THE DAY. THERE IS A
SLIGHT RISK THAT SOME OF THESE STORMS WILL BECOME SEVERE WITH
DAMAGING WINDS THE MAIN THREAT. HEAVY DOWNPOURS OF RAIN WILL ALSO
ACCOMPANY THESE STORMS AND SOME AREAS WILL SEE REPEATED SHOWERS INTO
THE EVENING HOURS. LOCALIZED FLOODING IS POSSIBLE.

HAZARDOUS WEATHER IS POSSIBLE AT THIS TIME.

.DAYS TWO THROUGH SEVEN...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED LATER TODAY.

STAY TUNED OR VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/MRX.

In the hours before

Local storm report, Jul 13, 6:39 PM EDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
639 PM EDT SUN JUL 13 2003

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0612 PM    4S KINGSTON               TN   0.75 IN HAIL
07/13/03   ROANE                          REPORTED BY AMATEUR
                                          RADIO.

Local storm report, Jul 13, 6:57 PM EDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
657 PM EDT SUN JUL 13 2003

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0620 PM    CLEVELAND                 TN   1.00 IN HAIL
07/13/03   BRADLEY                        REPORTED BY BRADLEY
                                          COUNTY 911.

Local storm report, Jul 13, 7:10 PM EDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
710 PM EDT SUN JUL 13 2003

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0640 PM    COUNTY WIDE               TN   WIND DAMAGE
07/13/03   ROANE                          NUMEROUS TREES AND
                                          POWERLINES DOWN. REPORTED
                                          BY ROANE COUNTY 911.

Local storm report, Jul 13, 7:13 PM EDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
713 PM EDT SUN JUL 13 2003

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0635 PM    OOLTEWAH                  TN   0.75 IN HAIL
07/13/03   HAMILTON                       REPORTED BY HAMILTON
                                          COUNTY 911.

Local storm report, Jul 13, 7:28 PM EDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
728 PM EDT SUN JUL 13 2003

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0725 PM    5N MADISONVILLE           TN   1.50 IN HAIL
07/13/03   MONROE                         REPORTED BY SPOTTER.

Local storm report, Jul 13, 7:34 PM EDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
734 PM EDT SUN JUL 13 2003

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0706 PM    SUNNYSIDE                 TN   WIND DAMAGE
07/13/03   LOUDON                         A FEW TREES DOWN.
                                          REPORTED BY SPOTTER.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 1:06 PM EDT	Severe Thunderstorm Warning	MRX	Morgan	54 min
Jul 13, 1:16 PM EDT	Severe Thunderstorm Warning	MRX	Scott	29 min
Jul 13, 4:11 PM EDT	Severe Thunderstorm Warning	MRX	Morgan	49 min
Jul 13, 4:43 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	32 min
Jul 13, 4:58 PM EDT	Severe Thunderstorm Warning	MRX	Morgan	47 min
Jul 13, 5:00 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe	45 min
Jul 13, 5:16 PM EDT	Tornado Warning	MRX	Morgan	29 min
Jul 13, 5:30 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton, Sequatchie	60 min
Jul 13, 5:36 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Roane	39 min
Jul 13, 5:40 PM EDT	Severe Thunderstorm Warning	MRX	Marion	65 min
Jul 13, 5:59 PM EDT	Severe Thunderstorm Warning	MRX	Bradley	61 min
Jul 13, 6:16 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, Roane	44 min
Jul 13, 6:30 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	60 min
Jul 13, 6:47 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Meigs, Monroe	58 min
Jul 13, 6:58 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Loudon	47 min
Jul 13, 6:05 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	55 min

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.