This is a multi-part message in MIME format...

------------=_1524063432-1947-59
Content-Type: text/plain

ACUS11 KWNS 181457
SWOMCD
SPC MCD 181456
WIZ000-IAZ000-MNZ000-181800-

Mesoscale Discussion 0277
NWS Storm Prediction Center Norman OK
0956 AM CDT Wed Apr 18 2018

Areas affected...portions of northern and northeast IA

Concerning...Heavy snow

Valid 181456Z - 181800Z

SUMMARY...Heavy snowfall rates ranging from 1 to 1.5 inches per hour
are expected through midday.

DISCUSSION...Water-vapor imagery this morning shows an eastward
migrating shortwave trough over IA while the left exit region of a
100-kt 300mb jet is placed over eastern IA. Strong DCVA (170m 12
hour height fall per Omaha, NE 12Z RAOB data) coupled with low- to
mid-level frontogenesis is resulting a west-east corridor of snow
from Sioux Falls to the MS river. Weak convection as evidenced by
lightning is moving east on the leading edge of stronger ascent
located within the warm conveyer.

Model forecast soundings show weak buoyancy co-located with a
dendritic growth layer for a few hours this morning. Expecting the
heavy snowfall rates to continue through midday across northern and
northeast IA before gradually diminishing this afternoon. Although
the precipitation shield will spread east into southern WI, models
suggest a gradual reduction in the spatiotemporal character of the
heavy snowfall rates as this area moves east into WI.

..Smith.. 04/18/2018

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...ARX...MPX...DMX...

LAT...LON 43649405 43619142 43449111 43159119 43059146 43169388
43359419 43649405



------------=_1524063432-1947-59
Content-Type: text/plain; charset="US-ASCII"
Content-Disposition: inline
Content-Transfer-Encoding: 7BIT

= = =
To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. ------------=_1524063432-1947-59--

--- SBBSecho 3.03-Linux
* Origin: CCO BBS - capitolcityonline.net:26 (1:2320/105)

This is a multi-part message in MIME format...

------------=_1554653617-1972-5921
Content-Type: text/plain

ACUS11 KWNS 071613
SWOMCD
SPC MCD 071613
TXZ000-071745-

Mesoscale Discussion 0277
NWS Storm Prediction Center Norman OK
1113 AM CDT Sun Apr 07 2019

Areas affected...Southeast TX...Middle/Upper TX Coast

Concerning...Severe Thunderstorm Watch 41...

Valid 071613Z - 071745Z

The severe weather threat for Severe Thunderstorm Watch 41
continues.

SUMMARY...Threat for damaging wind gusts, hail, and a tornado or two
remains across southeast TX and the middle/upper TX Coast.

DISCUSSION...Air mass ahead of the ongoing convective line continue
to destabilize amidst continue moisture advection. Dewpoints are now
between 70 and 72 deg F areawide and mesoanalysis estimates 2000+
J/kg. Additionally, the overall system is well organized, evidenced
by strong (i.e. 3-5 mb) height rises behind the line and sharpening reflectivity gradient along its leading edge. Another factor
suggesting intensification is the southeasterly surface winds and
resulting increased convergence.

Two factors potentially impeding further
intensification/organization are the line-parallel orientation of
the shear vectors and the slowing of the shortwave trough currently
moving through south TX.

Overall expectation is for gradual intensification/organization over
the next few hours with the forward speed of the overall system to
increase. Strong wind gusts are the primary severe threat. Some hail
also remains possible. A brief tornado or two is also possible,
particularly as the system intensifies and forward motion increases.

..Mosier.. 04/07/2019

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...LCH...SHV...HGX...CRP...EWX...

LAT...LON 28029674 30239688 31749469 29159468 28029674



------------=_1554653617-1972-5921
Content-Type: text/plain; charset="US-ASCII"
Content-Disposition: inline
Content-Transfer-Encoding: 7BIT

= = =
To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. ------------=_1554653617-1972-5921--

--- SBBSecho 3.06-Linux
* Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)