NATIONAL WEATHER SUMMARY

SEPTEMBER 2007

1st-8th...In the East on Monday, scattered showers and thunderstorms sat
over the coasts of South Carolina and Georgia. At times, rainfall was
heavy with gusty winds but no severe weather was reported. Minor
flooding also affected Richmond Hill, Georgia, with a few road
closings reported. Conditions in the Northeast, Ohio Valley,
Appalachians, Mid-Atlantic, Tennessee Valley, and the Gulf Coast
states were dry with partly cloudy skies due to high pressure over the
regions.
In the Plains, scattered showers and thunderstorms lingered off the
Texas Gulf Coast and southern Louisiana. Most rainfall totals were
around a tenth to a quarter of an inch but some local spots did
receive above an inch. Farther north, more showers and thunderstorms
stretched from southeastern Minnesota through central Nebraska. No
severe weather was reported, and rainfall was light in most places.
Conditions in the majority of the Central and Southern Plains,
Northern Plains, and the Mississippi Valley were dry with partly
cloudy skies.
In the West, a few showers were reported over parts of the Pacific
Northwest, Desert Southwest, central Rockies, and the Northern High
Plains, but no significant precipitation was recorded. Southern
California experienced a few showers and thunderstorms with gusty
winds reportedly knocking down powerlines in Ramona, California.
Conditions in the Southern Rockies and the northern and central
portions of California were dry with clear to partly cloudy skies.
In the East on Wednesday, isolated showers pushed across the eastern
Great Lakes, but rainfall was light. To the south, additional isolated
showers hung over the east coast of Florida. Most areas received
between a tenth to a quarter of an inch. But, some areas received
locally higher totals with Vero Beach, Florida, recording 1.48 inches
of rain. Elsewhere, conditions were dry with partly cloudy skies in
the Gulf Coast states, Southeast, Carolinas, Mid-Atlantic, the
majority of the Great Lakes, the Ohio and Tennessee Valleys, and the
Northeast. In the Plains, scattered showers and thunderstorms pushed
across the Southern Plains as well as the Lower and Middle Mississippi
Valley. Locally heavy rainfall of 1 to two inches was reported in
eastern Texas and Arkansas, which led to areas of flash flooding. Some
isolated strong to severe activity did occur with these cells
producing wind damage to trees and powerlines outside Richland, Texas.
To the north, a few showers moved into northwestern North Dakota.
Patchy fog and areas of haze impacted the Upper Mississippi Valley,
the Midwest, and the parts of the Central Plains during the morning
hours. High pressure and partly cloudy skies were prevalent across
portions of the Northern Plains. In the West, scattered showers and
thunderstorms spread across the Rocky Mountains, the northern High
Plains, the Desert Southwest, and the northern Great Basin. Some
severe weather was recorded with this activity. For example, locally
heavy rainfall led to flash flooding in southeastern Idaho, one inch
hail was recorded in Evanston, Wyoming, and at least one tornado was
observed outside Soda Springs, Idaho. Farther west, areas of patchy
fog were reported in northwestern Washington during the morning hours.
Conditions in most of the Pacific Northwest, California, and the
southern Great Basin were dry with partly cloudy skies.
9th15th...Forecasters predicted Tropical Depression Gabrielle would
bring more high winds and minor flooding along North Carolina's Outer
Banks on Monday. Rain was expected in New England and clear, dry
conditions in much of the West Coast.
Separately, rain was expected from the Gulf Coast to New England, with
strong storms in the New York Metropolitan area. Widespread rains were
also likely from the South to the southern Plains. In the West, clear
skies and warm temperatures were expected in most of the region.
In the East on Thursday, showers and thunderstorms moved over the Deep
South, Southeast, and Carolinas. Heavy rainfall occurred over the
Lower Mississippi Valley as Humberto moved through the region. Over 3
inches of rain fell in Louisiana, and gusty winds were reported. Heavy
rainfall was also reported in the Southeast, and urban flooding
occurred in Savannah, Georgia. To the north, skies were generally fair
and dry over the Northeast, Great Lakes, Ohio Valley, and Mid-Atlantic
regions. Across the central and western regions, a frontal boundary
sparked showers and thunderstorms over the western Great Lakes and
Upper Midwest. Hail fell in the northern Mississippi Valley. Skies
were partly cloudy and dry over the central and northern Plains,
though a few thunderstorms developed in Nebraska and Kansas during the
afternoon and evening hours. Texas experienced generally fair skies,
with the exception of a few showers in eastern areas of the state.
West of the Rockies, skies were sunny with dry conditions as high
pressure dominated the area. Gusty winds developed across the northern
Plains and Sierra Nevada Mountains.
In the East on Friday, the remains of Tropical Depression Humberto
moved across much of the Deep South, Tennessee Valley and portions of
the Southeast and western points in the Mid-Atlantic through the
morning hours. Heavy rains created flash flooding in portions of
Alabama and Mississippi. Rainfall totals of over three and a half
inches were reported in Greenwood, Mississippi, while Columbus,
Mississippi, reported just over two inches of rainfall. Isolated
tornadoes were also reported across central Alabama. A sweeping cold
front in Michigan created scattered showers and brought much cooler
temperatures to that state. High pressure allowed for dry conditions
under partly cloudy to mostly clear skies across the Northeast, Ohio
Valley, eastern Great Lakes, coastal Mid-Atlantic and southern
Florida. Across the central and western regions, a stationary front
sparked widely scattered and very light rain showers across portions
of the northern Great Basin. Rainfall totals were light, with all
stations reporting under two-tenths of an inch. A weak frontal
boundary also moved across the far northwestern Great Lakes, bringing
some isolated rain showers to the region. Mixed in with the rain
showers, a few very isolated reports of snow were reported during the
early morning hours, but quickly turned back to rain through the
afternoon. A powerful cold front sweeping down the southern Plains
brought much cooler temperatures, but very little precipitation to
that region. Dry conditions under partly cloudy to mostly clear skies
were seen across the Rockies, central and northern Plains, Pacific
Northwest, Desert Southwest and California.

16th-22nd...Across the eastern half of the country on Monday, a
stationary front produced heavy rainfall across parts of Florida with
areas around Jacksonville, Florida receiving nearly three inches.
Localized street flooding was reported in the area as well. Otherwise,
mostly clear skies and fair weather conditions continued across the
remainder of the East due to a broad ridge of high pressure. Across
the western half of the nation, a weak upper level disturbance
produced scattered showers and thunderstorms across parts of the
northern and central Plains as well as the upper Midwest. No severe
weather was reported with rainfall amounts less than one quarter of an-
inch. Scattered showers and thunderstorms across the central Rockies
produced rainfall amounts of 3 quarters of an-inch in some locations,
with Meeker, Colorado receiving over one inch of rainfall. Weakening
showers moved across parts of the northern Great Basin, Pacific
Northwest and northern California along a cold front. Seattle,
Washington received one quarter of an-inch of rainfall. The Southwest
also experienced a few showers and isolated thunderstorms with
rainfall generally less than one-tenth of an-inch. Otherwise, most of
the western United States observed partly cloudy skies, with fog and
low clouds dissipating along the West Coast.
Across the East on Thursday, a stationary front draped across Florida
and stretching along the Carolina coastline, continued to produce
scattered showers and thunderstorms across the southern Atlantic
coastline early this afternoon. No severe weather activity was
reported, but heavy surf along with dangerous rip currents, as well as
two to three foot swells, were common concerns across the coastal
communities. Windy conditions were reported as well, with sustained
winds in excess of 20 miles per hour, and gusts nearing 35 miles per
hour. Otherwise, a broad area of high pressure continued to produce
clear to partly cloudy skies and fair, dry conditions to the remainder
of the Eastern United States. Over the central region, a strong
surface low continued to progress across the northern Plains and into
the upper Midwest, producing scattered showers and isolated strong
thunderstorms in its path. Periods of heavy rain, winds gusting in
excess of 40 mph, and hail up to two inches in diameter were the main
causes of concern with this activity. Elsewhere, fair and dry
conditions continued throughout the morning across the Mississippi
Valley and the southern and central Plains. In the West, a broad upper-
level low centered over the central California coastline, produced
areas of scattered showers over the central Valley and portions of the
Bay Area throughout the early afternoon. High elevations of the Sierra
Nevadas reported over three inches of snow since early this morning,
as a result of this system. Farther south and east, a weak surface
trough brought morning showers and isolated thunderstorms to eastern
portions of the Desert Southwest and the southern Rockies. Otherwise,
a ridge of high pressure produced fair skies and dry conditions over
the remainder of the Desert Southwest, the Four Corners region, and
the southern Great Basin. Skies remained partly cloudy over much of
the Pacific Northwest and northern Rockies.
In the East on Friday, scattered showers and thunderstorms developed
over the Southeast, Gulf Coast, and Mid-Atlantic regions. Some
locations received heavy rainfall. This rainfall was associated with
Tropical Depression Ten as it moved over the Gulf of Mexico. A few
tornadoes were reported in Georgia and Florida, and gusty winds were
recorded along the Gulf. Further north, skies were partly cloudy and
dry over the Northeast, central and eastern Great Lakes, and Ohio
Valley. Over the central region, a strong area of low pressure and
trailing cold front sparked showers and thunderstorms over the western
Great Lakes, Midwest, and central Plains. In the Upper Midwest, severe
thunderstorms were reported, with wind gusts to 70 mph, hail, and
heavy rainfall. Skies were generally clear and dry over the northern
and southern Plains and Lower Mississippi Valley. High winds were
reported most of the day over the northern Plains. A few isolated
thunderstorms formed in western Texas in the late afternoon hours.
Across the West, a low pressure system off the California coastline
triggered showers and thunderstorms over the southern half of the
state. High winds were reported as well. A few showers and
thunderstorms developed over the Desert Southwest. No severe weather
was reported. Skies were fair and dry over the Great Basin, central
and northern Rockies, and Pacific Northwest.

23rd-29th...The Northeast warmed up as high pressure promoted plenty of
sunshine, while northern New England remained pleasant with a cool
flow from the northwest on Monday. High temperatures in the mid-
Atlantic were mostly in the 80s with a very warm southerly flow. The
southern Plains to the Midwest and Southeast all had temperatures
soaring into the 80s and 90s. Many more record high temperatures were
broken and tied in the Midwest and Southeast, especially in the
Tennessee Valley, where temperatures averaged 10 to 15 degrees above
normal. Some spots in the Midwest climbed more than 30 degrees from
morning lows in the 50s or 60s rather quickly. Meanwhile, an elongated
tropical wave, extending from the central Gulf to the western Yucatan,
brought heavy thunderstorms to the parched lower Mississippi Valley.
Showers kept temperatures slightly cooler over the coastal plains of
the Carolinas just as thunderstorms kept most Florida temperatures
from climbing into the 90s. To the west, a strong cold front marched
east across the Plains and into the western Great Lakes. Strong wind
gusts, much greater than 50 mph were endured from Kansas to
northwestern Wisconsin, and two tornadoes touched down in severe
storms that rumbled through southern Nebraska. Hail and heavy rain
added to the dreary and damaging weather in the Plains. A cool blast
of air was felt behind the front from Montana to the western Plains
and as far south as Utah and Colorado. It was rain-free for the
Southwest and much of the West Coast with the exception of a few
showers moving into northwestern Washington in the late evening
hours.
In the East on Wednesday, a cold front stretching southwest from
southeastern Ontario and into the middle and lower Mississippi Valley,
produced showers with a few embedded thunderstorms across the Great
Lakes, parts of the Ohio Valley, and portions of the Mississippi
Valley. A few heavy rain showers were reported, but rainfall totals
were generally under .30 of an-inch over the impacted regions. To the
south and east, an upper-level disturbance brought heavy rain showers
and thunderstorms to the southern Florida Peninsula, with the heaviest
shower activity generally remaining offshore. Localized rainfall
totals across southern-most Florida ranged from three quarters of an-
inch to over three inches. Otherwise, fair and dry conditions were
reported across the Northeast, much of the Middle Atlantic region, the
eastern Tennessee Valley, and the Southeast. In the western two-thirds
of the country, the tail-end of a cold front extending northeast into
the Great Lakes, triggered areas of showers and thunderstorms across
portions of the southern Plains. A few heavy rain showers were
reported across eastern Oklahoma, producing rainfall rates near 1.5
inches per hour. Farther north, a weak surface low pushed across the
northern High Plains and into the Dakotas, bringing cloudy skies and
light rain showers to the area. A ridge of high pressure settled into
the central Plains and upper Midwest this morning, allowing for fair
and dry weather conditions into the early afternoon. Elsewhere, a
broad area of high pressure centered over the Great Basin, produced
fair and dry conditions along the Rocky Mountains and across the
remainder of the western third of the nation.
Across the East on Friday, scattered showers and thunderstorms
developed over the Northeast. Small hail fell in New York. Rainfall
amounts were heaviest in western New York. Afternoon showers and
thunderstorms were reported in central Florida. Skies were sunny and
clear over the Southeast, Deep South, Mid-Atlantic, Ohio and Tennessee
Valleys, and central Great Lakes.
Over the central region, showers and thunderstorms fired in western
Oklahoma, western Nebraska, western Kansas, and the western half of
Texas. Storms in Kansas dropped large hail and damaging winds. Showers
and thunderstorms were also reported along the Texas Gulf Coast.
Further to the north, skies were generally sunny and dry over the
northern Plains and Midwest. In the West, a developing low pressure
system over the central Rockies sparked scattered showers and
thunderstorms in the central and southern Rockies. Strong
thunderstorms were reported. Another area of showers moved over the
Pacific Northwest. Rainfall amounts were light. Higher elevations even
had snow fall. Skies were partly cloudy and dry over the northern
rockies, Desert Southwest, Great Basin, and California.