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LU9DCE > NEWS 27.09.26 19:33l 205 Lines 6322 Bytes #999 (0) @ WW
BID : 22926_LU9DCE
Read: OE5RCO DJ6UX GUEST
Subj: STORM PREDICTION CENTER 27-SEP
Path: DB0FHN<DB0FFL<CS5NRA<CQ0PAX<GB7CAM<VE3KPG<VE3CGR<LU9DCE
Sent: 260927/1616Z 22926@LU9DCE.TOR.BA.ARG.SOAM LinBPQ6.0.25
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PACKET RADIO STATION - BUENOS AIRES (GF05OM)
PYTHON SCHEDULED NEWSLETTERS (PSN)
COPYRIGHT 2026 - EDUARDO A. CASTILLO
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SPC - NO WATCHES ARE VALID AS OF SUN SEP 27 07:24:02 UTC 2026
NO WATCHES ARE VALID AS OF SUN SEP 27 07:24:02 UTC 2026.
========================================
SPC - NO MDS ARE IN EFFECT AS OF SUN SEP 27 07:24:02 UTC 2026
NO MESOSCALE DISCUSSIONS ARE IN EFFECT AS OF SUN SEP 27 07:24:02 UTC
2026.
========================================
SPC SEP 27, 2026 0600 UTC DAY 1 CONVECTIVE OUTLOOK
SPC 1200Z DAY 1 OUTLOOK
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1252 AM CDT SUN SEP 27 2026
VALID 271200Z - 281200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS PORTIONS OF THE
CENTRAL AND NORTHERN HIGH PLAINS...
...SUMMARY...
ISOLATED THUNDERSTORMS CAPABLE OF LARGE HAIL WILL BE POSSIBLE ACROSS
PORTIONS OF WESTERN NEBRASKA AND THE BLACK HILLS OF SOUTH DAKOTA.
... SYNOPSIS ...
THE MIDLEVEL PATTERN ACROSS THE CONUS TODAY WILL FEATURE A NEARLY
STATIONARY OCCLUDING CYCLONE SOUTHEAST OF LONG ISLAND, BROAD
ANTICYCLONIC FLOW ACROSS THE MIDDLE OF THE COUNTRY, AND A DEEP
TROUGH MOVING INTO NORTHERN AND CENTRAL CALIFORNIA. ADDITIONALLY, A
SUBTLE VORTICITY MAXIMA IS FORECAST TO LIFT QUICKLY FROM NEAR THE
SOUTHERN CALIFORNIA COAST TOWARD THE NORTHERN PLAINS.
... PORTIONS OF THE CENTRAL AND NORTHERN HIGH PLAINS ...
DIURNAL HEATING OF A SEASONABLY MOIST AIRMASS WILL RESULT IN BETWEEN
1000-2000 J/KG OF SBCAPE DURING THE AFTERNOON. THE ATMOSPHERE IS
LIKELY TO BE CAPPED DURING THE AFTERNOON, ALTHOUGH AN ISOLATED
THUNDERSTORM OR TWO ARE POSSIBLE. LARGE HAIL AND STRONG THUNDERSTORM
WINDS WILL BE POSSIBLE WITH ANY SURFACE-BASED THUNDERSTORMS THAT DO
DEVELOP. DURING THE EVENING, THUNDERSTORM COVERAGE MAY INCREASE IN
RESPONSE TO INCREASING LARGE-SCALE ASCENT ASSOCIATED WITH THE
APPROACHING SUBTLE VORTICITY MAXIMA AND AN INCREASE IN THE LOW-LEVEL
JET. LARGE HAIL WILL BE POSSIBLE WITH THE STRONGEST OF THESE STORMS.
..MARSH.. 09/27/2026
READ MORE
========================================
SPC SEP 27, 2026 0600 UTC DAY 2 CONVECTIVE OUTLOOK
SPC 0600Z DAY 2 OUTLOOK
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1256 AM CDT SUN SEP 27 2026
VALID 281200Z - 291200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
SEVERE THUNDERSTORMS ARE NOT FORECAST ACROSS THE U.S. ON MONDAY OR
MONDAY NIGHT.
...DISCUSSION...
AT MID-LEVELS, A RIDGE WILL BE IN PLACE OVER THE CENTRAL U.S. ON
MONDAY, AS A TROUGH MOVES INTO THE DESERT SOUTHWEST. BETWEEN THESE
TWO FEATURES, MOISTURE AND INSTABILITY WILL BE SUFFICIENT FOR
SCATTERED THUNDERSTORM DEVELOPMENT FROM PARTS OF THE DESERT
SOUTHWEST AND INTERMOUNTAIN WEST EASTWARD INTO THE GREAT PLAINS.
INSTABILITY IS FORECAST TO REMAIN RELATIVELY WEAK, AND SEVERE
THUNDERSTORMS ARE NOT FORECAST ACROSS THE CONTINENTAL U.S. MONDAY OR
MONDAY NIGHT.
..BROYLES.. 09/27/2026
READ MORE
========================================
SPC SEP 27, 2026 0730 UTC DAY 3 SEVERE THUNDERSTORM OUTLOOK
SPC 0730Z DAY 3 OUTLOOK
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0222 AM CDT SUN SEP 27 2026
VALID 291200Z - 301200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
NO SEVERE THUNDERSTORMS ARE FORECAST ACROSS THE U.S. ON TUESDAY AND
TUESDAY NIGHT.
...DISCUSSION...
AT MID-LEVELS ON TUESDAY, ZONAL WESTERLY FLOW WILL BE IN PLACE OVER
THE NORTHWESTERN U.S. WITH A TROUGH IN THE NORTHERN PLAINS. AN
UPPER-LEVEL LOW WILL MOVE ACROSS THE DESERT SOUTHWEST. IN THE
VICINITY OF THIS SYSTEM, SCATTERED THUNDERSTORMS WILL DEVELOP DURING
THE DAY OVER MUCH OF THE SOUTHWEST. MORE ISOLATED STORMS WILL BE
POSSIBLE FROM THE CENTRAL ROCKIES NORTHEASTWARD INTO THE UPPER
MISSISSIPPI VALLEY. INSTABILITY IS EXPECTED TO REMAIN RELATIVELY
WEAK, AND NO SEVERE THREAT IS FORECAST ACROSS THE CONTINENTAL U.S.
TUESDAY AND TUESDAY NIGHT.
..BROYLES.. 09/27/2026
READ MORE
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SPC DAY 1 FIRE WEATHER OUTLOOK
SPC DAY 1 FIRE WEATHER OUTLOOK
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0142 AM CDT SUN SEP 27 2026
VALID 271200Z - 281200Z
...SYNOPSIS...
AN AMPLIFYING WESTERN CONUS TROUGH WILL SUPPORT STRENGTHENING
DEEP-LAYER SOUTH-SOUTHWESTERLY FLOW ACROSS PORTIONS OF THE GREAT
BASIN TODAY. AFTERNOON BOUNDARY-LAYER MIXING WILL YIELD SUSTAINED
SOUTH-SOUTHWESTERLY SURFACE WINDS OF 15-20 MPH (WITH HIGHER GUSTS)
AMID 10-15 PERCENT RH. THESE DRY/BREEZY CONDITIONS, COMBINED WITH
SUFFICIENTLY RECEPTIVE FUELS, WILL LEAD TO ELEVATED FIRE-WEATHER
CONDITIONS ACROSS PORTIONS OF CENTRAL/EASTERN NV.
..WEINMAN.. 09/27/2026
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
READ MORE
========================================
SPC DAY 2 FIRE WEATHER OUTLOOK
SPC DAY 2 FIRE WEATHER OUTLOOK
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0143 AM CDT SUN SEP 27 2026
VALID 281200Z - 291200Z
...NO CRITICAL AREAS...
...SYNOPSIS...
A CLOSED MIDLEVEL LOW WILL TRACK EASTWARD ACROSS THE SOUTHERN GREAT
BASIN INTO THE SOUTHWEST ON MONDAY, WHILE A MIDLEVEL RIDGE AND
ACCOMPANYING SURFACE HIGH PRESSURE BUILD OVER THE INTERMOUNTAIN
WEST. THIS PATTERN WILL SUPPORT DRY/BREEZY OFFSHORE FLOW ACROSS
PORTIONS OF SOUTHERN CA, WITH LOCALLY ELEVATED FIRE-WEATHER
CONDITIONS POSSIBLE (ESPECIALLY ACROSS THE MOUNTAINS AND OTHER
WIND-PRONE AREAS). HOWEVER, THE OVERLAP OF DRY/BREEZY CONDITIONS
WITH SUFFICIENTLY RECEPTIVE FUELS CURRENTLY APPEARS TOO LIMITED FOR
HIGHLIGHTS.
..WEINMAN.. 09/27/2026
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
READ MORE
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