- Денес
- Утре
- Day Three
000
acus01 kwns 190044
swody1
Storm Prediction Center ac 190043
Day 1 convective outlook
National Weather Service Storm Prediction Center Norman OK
0643 PM CST Tue Dec 18 2018
Valid 190100z - 191200z
..no severe thunderstorm areas forecast...
...
severe thunderstorms are not forecast tonight across the contiguous
United States.
...
A vigorous mid-level low/shortwave trough over the Permian Basin
will move east across much of Texas tonight. A low chance for a few
thunderstorms is forecast initially over the Edwards Plateau and
subsequently farther east over east-central Texas later tonight.
Isolated thunderstorms are possible through at least the late
evening hours over western Washington south to near the Columbia River.
Rising mid-level heights later tonight will correspond to
diminishing convective activity over the Pacific northwest by early
Wednesday morning. Elsewhere, quiescent conditions will prevail.
.Smith.. 12/19/2018
$$
Mesoscale Discussion
000
acus11 kwns 170704
sels mesoscale discussion
Storm Prediction Center mesoscale discussion 170703
mez000-nhz000-171300-
Mesoscale discussion 1714
National Weather Service Storm Prediction Center Norman OK
0103 am CST Mon Dec 17 2018
Areas affected...southern and eastern Maine
Concerning...winter mixed precipitation
Valid 170703z - 171300z
Summary...snow, perhaps mixed with freezing rain or sleet, will
remain possible through the overnight hours.
Discussion...frontogenesis in the 850-700-millibar layer within the
warm-conveyor belt has resulted in a band of heavy precipitation
along the southeast coast of Maine. This band will continue to pivot
northwest through the overnight hours. In the vicinity of this band,
surface temperatures have fallen below 32f, despite rap forecasts
suggesting temperatures would remain near or above 32f. Modifying
the rap soundings for the observed colder surface temperatures, wet
snow is likely, but given the strength of the warm-air advection
within the warm-conveyor belt, temperatures within the
850-700-millibar layer may approach, or even exceed, 0c. As such,
precipitation may mix with, or change to, freezing rain or sleet
overnight.
.Marsh/Goss.. 12/17/2018
..please see www.Spc.NOAA.Gov for graphic product...
Attention...WFO...car...gyx...
Latitude...Lon 44197086 45246936 45826711 44936676 44246739 43256962
43007082 44197086
