087
FXUS01 KWBC 010744
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
344 AM EDT FRI SEP 01 2023
VALID 12Z FRI SEP 01 2023 - 12Z SUN SEP 03 2023
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER THE PARTS OF
THE SOUTHWEST/GREAT BASIN ON FRIDAY/SATURDAY AND EASTERN GULF
COAST ON FRIDAY...
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE SOUTHWEST/GREAT BASIN ON FRIDAY...
...THERE IS AN ELEVATED RISK OF FIRE WEATHER OVER PARTS OF THE
CENTRAL PLAINS ON FRIDAY...
MOISTURE STREAMING NORTHWARD OVER NORTHWESTERN MEXICO AND
UPPER-LEVEL ENERGY WILL AID IN PRODUCING SHOWERS AND THUNDERSTORMS
WITH HEAVY RAIN OVER PARTS OF ARIZONA, SOUTHERN UTAH, SOUTHEASTERN
NEVADA, AND EXTREME SOUTHEASTERN CALIFORNIA. THEREFORE, THE WPC
HAS ISSUED A SLIGHT RISK OF EXCESSIVE RAINFALL WITH THESE
THUNDERSTORMS OVER PARTS OF THE SOUTHWEST/GREAT BASIN THROUGH
SATURDAY MORNING. THE ASSOCIATED HEAVY RAIN WILL CREATE MAINLY
LOCALIZED AREAS OF FLASH FLOODING, WITH URBAN AREAS, ROADS, SMALL
STREAMS, NARROW CRAYONS/GULLIES, AND BURN SCARS THE MOST
VULNERABLE.
MOREOVER, THERE IS A THREAT OF STRONG TO SEVERE THUNDERSTORMS OVER
THE SOUTHWEST/GREAT BASIN. THEREFORE, THE SPC HAS ISSUED A
MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF THE
SOUTHWEST/GREAT BASIN THROUGH SATURDAY MORNING. THE HAZARDS
ASSOCIATED WITH THESE THUNDERSTORMS ARE FREQUENT LIGHTNING, SEVERE
THUNDERSTORM WIND GUSTS, HAIL, AND A MINIMAL THREAT OF TORNADOES.
IN ADDITION, AN UPPER-LEVEL TROUGH OVER THE PACIFIC NORTHWEST WILL
AID IN PRODUCING SHOWERS WITH EMBEDDED THUNDERSTORMS OVER THE AREA
THROUGH SATURDAY EVENING.
ON SATURDAY, THE THREAT OF EXCESSIVE RAINFALL CONTINUES OVER PARTS
OF THE SOUTHWEST AS MOISTURE STREAMS INLAND OVER NORTHWESTERN
MEXICO, PRODUCING SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN.
THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK OF EXCESSIVE RAINFALL
WITH THESE THUNDERSTORMS OVER PARTS OF THE SOUTHWEST/GREAT BASIN
FROM SATURDAY INTO SUNDAY MORNING. THE ASSOCIATED HEAVY RAIN WILL
CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING, WITH URBAN AREAS,
ROADS, SMALL STREAMS, NARROW CRAYONS/GULLIES, AND BURN SCARS THE
MOST VULNERABLE.
MEANWHILE, UPPER-LEVEL ENERGY AND TROPICAL MOISTURE STREAMING
NORTHWARD OVER THE CENTRAL/EASTERN GULF COAST WILL PRODUCE SHOWERS
AND THUNDERSTORMS WITH HEAVY RAIN ON FRIDAY. THEREFORE, THE WPC
HAS ISSUED A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE
EASTERN GULF COAST THROUGH SATURDAY MORNING. THE ASSOCIATED HEAVY
RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING, WITH
URBAN AREAS, ROADS, AND SMALL STREAMS THE MOST VULNERABLE.
ALSO, ON FRIDAY, GUSTY WIND AND LOW RELATIVE HUMIDITY OVER PARTS
OF THE PLAINS PROMPTED THE SPC TO ISSUE AN ELEVATED RISK OF FIRE
WEATHER OVER PARTS OF THE CENTRAL PLAINS.
THE THREAT OF EXCESSIVE RAINFALL DECREASES THE EASTERN GULF COAST
ON SATURDAY. HOWEVER, SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER
PARTS OF THE CENTRAL/EASTERN GULF COAST AND THE SOUTHEAST.
WILDFIRE SMOKE OVER PARTS OF CALIFORNIA AND THE PACIFIC NORTHWEST
HAS PROMPTED AIR QUALITY ALERTS OVER PARTS OF THE REGION ON FRIDAY.
ZIEGENFELDER
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