Alert archive / Tennessee / Special Weather Statements in 2017

Special Weather Statement, NWS Memphis, TN

April 17, 2017Hardeman County, Hardin County, McNairy County, Tennessee

NWS Memphis, TN issued this special weather statement at Apr 17, 2017, 3:01 PM CDT for Hardeman County, Hardin County, McNairy County, Tennessee. It was in force for 59 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
Apr 17, 2017, 3:01 PM CDT (20:01 UTC)
Expired
Apr 17, 2017, 4:00 PM CDT
In force
59 min
Issued by
NWS Memphis, TN

Counties Hardeman County, TN, Hardin County, TN, McNairy County, TN

The radar

The Memphis radar (KNQA), 136 km from the middle of the area, began a volume at 20:05 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 nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 8.0 hours before the alert went out and 148 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-pSkew-T log-p diagram, Little Rock, AR at 12:00Z on 2017-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 604 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2017-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
604 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
-26 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.8

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 17, 12:19 PM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, Apr 17, 12:19 PM CDT, 2 hours 42 minutes before
Area Forecast Discussion
National Weather Service Memphis TN
1219 PM CDT Mon Apr 17 2017

.DISCUSSION...
Updated for 18Z Aviation Discussion.

&&

.PREV DISCUSSION... /issued 1050 AM CDT Mon Apr 17 2017/

DISCUSSION...

Remnants of MCS that developed over NE Oklahoma and NW Arkansas
lat night is pushing into the Delta region this morning. Meanwhile
a weak stationary front is draped across the area and deeper
moisture associated with a weak mid level trough is moving into
the region. Expect showers and thunderstorms to continue to
develop across the Mid-South this afternoon. SBCAPES range from
1000-1500 j/kg east of the MS River and there is 30 kts of 0-6km
shear north of I-40. A few strong storms are possible this
afternoon mainly along and east of the MS River with gusty winds
and small hail.

SJM

&&

.PREV DISCUSSION... /issued 349 AM CDT Mon Apr 17 2017/

Guidance continues to over-do rainfall coverage in the near
term...next weekend is looking interesting.

Showers and thunderstorms are moving into West Arkansas and will
eventually make into the Midsouth but currently conditions are dry
across the region. Temperatures are in the middle 60s. Skies are
mostly cloudy with dew points in the low to middle 60s so
temperatures are not likely to fall more than another degree or so
before sunrise. There may be a few showers around for the morning
commute...but the widespread rain and thunderstorms probably won't
arrive until around 11 am or so in East Arkansas...and noon to 1
PM along the Mississippi River. We should finally get some
rainfall across the Midsouth this afternoon after guidance has
been teasing us for a day or so. Rainfall totals this afternoon
and overnight of around one half of an inch are expected.
Conditions do not look supportive of severe thunderstorms.

We will remain under zonal flow through most of the work week. A
weak cold front will sink into Northeast Arkansas and North
Tennessee as a series of mid level disturbances shift across the
same region. A couple of rounds of rain and thunderstorms are
expected...one today and another Thursday...but neither look
overly organized. Temperatures will remain above normal through
Thursday...near to slightly below normal Friday.

Weak ridging will take place Friday in response to a deepening
trough over the Southern Plains. Guidance is in poor agreement
with timing, but most models bring a fairly potent system across
the Midsouth Saturday afternoon or Saturday night. Its still a
long way out so confidence is low...but it has been featured in
guidance for several runs now, so I will introduce strong to
severe wording to the HWO.

30

&&

.AVIATION...
18Z TAFs

Scattered showers and thunderstorms during the first half of the
TAF cycle with conditions varying mostly between VFR and
MVFR...though brief IFR VSBY in the heaviest downpours is
possible. During the second half of the period...IFR stratus with
patchy drizzle is favored. Can't rule out the potential for
LIFR...but confidence is low at this time. Winds will be either
light from the south or east as a weak cold front drops south.
Winds may gust up to 20 to 25 kts in storms.

JAB

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...None.
MO...None.
MS...None.
TN...None.
&&
Hazardous weather outlook, Apr 17, 2:16 PM CDT, 45 minutes before
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In the hours before

Special weather statement, Apr 17, 1:38 PM CDT, 1 hour 23 minutes before
Special Weather Statement
National Weather Service Memphis TN
138 PM CDT MON APR 17 2017

TNZ053-090-171930-
Hardeman TN-Chester TN-
138 PM CDT MON APR 17 2017

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 230 PM CDT
FOR...

Northeastern Hardeman County in western Tennessee...
Southwestern Chester County in western Tennessee...

At 138 PM CDT...a strong thunderstorm producing pea size hail or
larger and winds at least 40 mph was located near Bolivar, moving
east at 20 mph.

Very heavy rain along with continuous cloud to ground lightning are
also possible with this thunderstorm.

People in northeastern Hardeman and southwestern Chester Counties
should monitor this storm closely.

LAT...LON 3537 8861 3536 8864 3534 8867 3530 8866
      3531 8869 3526 8871 3525 8872 3525 8878
      3513 8879 3513 8904 3543 8903 3543 8857
TIME...MOT...LOC 1838Z 275DEG 17KT 3534 8895
Special weather statement, Apr 17, 1:42 PM CDT, 1 hour 19 minutes before
Special Weather Statement
National Weather Service Memphis TN
142 PM CDT MON APR 17 2017

TNZ003-004-020-021-171930-
Carroll TN-Weakley TN-Henry TN-Gibson TN-
142 PM CDT MON APR 17 2017

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 230 PM CDT
FOR...

Carroll County in western Tennessee...
Southeastern Weakley County in western Tennessee...
Western Henry County in western Tennessee...
Southeastern Gibson County in western Tennessee...

At 142 PM CDT...a strong thunderstorm producing pea size hail or
larger and winds at least 40 mph was located over Gleason, or 7 miles
northwest of McKenzie, moving east at 20 mph.

Very heavy rain along with continuous cloud to ground lightning are
also possible with this thunderstorm.

People in Carroll...southeastern Weakley...western Henry and
southeastern Gibson Counties should monitor this storm closely.

LAT...LON 3596 8822 3581 8887 3639 8870 3644 8821
TIME...MOT...LOC 1842Z 275DEG 17KT 3619 8864
Special weather statement, Apr 17, 2:02 PM CDT, 59 minutes before
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Special weather statement, Apr 17, 2:24 PM CDT, 37 minutes before
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Special weather statement, Apr 17, 2:39 PM CDT, 22 minutes before
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Special weather statement, Apr 17, 3:01 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 11:37 AM CDTSpecial Weather StatementMEGDyer23 min
Apr 17, 11:59 AM CDTSpecial Weather StatementMEGDyer46 min
Apr 17, 12:00 PM CDTSevere Thunderstorm WarningMEGDyer27 min
Apr 17, 1:38 PM CDTSpecial Weather StatementMEGChester, Hardeman52 min
Apr 17, 1:42 PM CDTSpecial Weather StatementMEGCarroll, Henry, Weakley48 min
Apr 17, 1:56 PM CDTSevere Thunderstorm WarningMEGCarroll34 min
Apr 17, 2:24 PM CDTSpecial Weather StatementMEGBenton66 min
Apr 17, 12:33 PM CDTSpecial Weather StatementMEGDeSoto, Quitman, Tate42 min
Apr 17, 12:59 PM CDTSevere Thunderstorm WarningMEGCoahoma, Quitman, Tallahatchie31 min
Apr 17, 1:11 PM CDTFlash Flood WarningMEGCoahoma, Quitman2 hr
Apr 17, 1:17 PM CDTSpecial Weather StatementMEGPanola, Quitman, Tate43 min
Apr 17, 2:02 PM CDTSpecial Weather StatementMEGPanola, Quitman43 min
Apr 17, 2:39 PM CDTSpecial Weather StatementMEGYalobusha51 min
Apr 17, 3:19 PM CDTSpecial Weather StatementMEGDeSoto56 min

Nearby

Special Weather Statements in Tennessee, 2017Every special weather statement in 2017

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.