| Product Name |
Brief Description Click Here for "Printable" version of this list. |
| National Digital Forecast Database (NDFD) Climate Outlook Probability Elements | Product Description: The National Digital Forecast Database (NDFD)
contains a seamless mosaic of digital weather forecasts from National
Weather Service (NWS) field offices and the National Centers for
Environmental Prediction (NCEP). The Climate Prediction Center (CPC)
is the NWS center of expertise for climate outlooks covering valid
periods of one week, one month, and three-months, with lead times
(i.e. advance issuance before the beginning of the valid period) from
a zero lead to 12.5 months of lead time.
As of October 18, 2007, the following Climate Outlooks by the CPC are
(or will be) available in the NDFD in experimental status. The
outlooks are probabilistic (expressed in percent)
Probability of 8- to 14-Day Average Temperature Above Normal
Probability of 8- to 14-Day Average Temperature Below Normal
Probability of 8- to 14-Day Total Precipitation Above Median
Probability of 8- to 14-Day Total Precipitation Below Median
Probability of One-month Average Temperature Above Normal
Probability of One-month Average Temperature Below Normal
Probability of One-month Total Precipitation Above Median
Probability of One-month Total Precipitation Below Median
Probability of Three-month Average Temperature Above Normal
Probability of Three-month Average Temperature Below Normal
Probability of Three-month Total Precipitation Above Median
Probability of Three-month Total Precipitation Below Median
All of these elements are available for the contiguous U.S. (CONUS),
the 16 pre-defined NDFD CONUS subsectors (see
http://www.weather.gov/ndfd/coverage.htm), and Alaska.
Since these probabilistic outlooks pertain to the average temperature
and total precipitation for the entire valid period and not to the
variability within it, they will not help people planning events for
specific dates or sub-periods. |
| 3- to 14-day Hazards Assessment | The Climate Prediction Center issues this product for the contiguous
U.S. and Alaska to provide potential hazardous conditions from
extreme temperature, high wind, heavy precipitation or lack of
precipitation, and dry or moist soils and wildfire risk. |
| 3- to 14-day Hazards Assessment Discussion | The Climate Prediction Center (CPC) provides a text discussion for the
contiguous U.S. and Alaska with technical insight to further assist
in assessing potentially hazardous conditions in the 3-to 14-Day
Hazards Assesment. |
| 6- to 10-Day and 8- to 14-day Excessive Heat Outlooks (Contiguous U.S) | The Climate Prediction Center (CPC) issues 6- to 10-Day and 8- to
14-Day excessive heat outlooks in probabilistic format for the
Contiguous U.S. |
| 6- to 10-Day and 8- to 14-day Maximum Heat Index Prediction | The Climate Prediction Center (CPC) issues 6- to 10-Day and 8- to
14-Day Maximum Heat Index Predictions for approximately 200 locations
in the Contiguous U.S. |
| 6- to 10-Day and 8- to 14-Day Mean North American 500 millibar Outlook | The Climate Prediction Center (CPC) issues these outlooks to provide
insight into the 6- to 10-day and 8- to 14-day temperature and
precipitation outlooks by indicating mean circulation patterns. |
| 6- to 10-Day and 8- to 14-day Minimum Wind Chill Prediction (Contiguous U.S and Alaska) | CPC will issue maps indicating the probability (in percent) that the
minimum wind chill value will in the below normal category and below
seven specific thresholds: 32F, 28F, 20F, 10F, 0F, -20F, and -40F.
The wind chill index formula is described in Instruction 10-513 (WFO
Winter Weather Products Specification) |
| 6- to 10-Day and 8- to 14-Day Outlook Discussion (Contiguous U.S. and Alaska). | The Climate Prediction Center (CPC) provides a technical discussion
of the meteorological and climatological basis for the outlooks. |
| 6- to 10-Day and 8- to 14-Day Outlooks (Contiguous U.S. and Alaska) | The Climate Prediction Center (CPC) issues 6- to 10-Day and 8- to
14-Day outlooks in probabilistic format for the Contiguous U.S. and
Alaska. |
| ABRFC Recreational Forecast Graphics | The National Weather Service (NWS) is the agency responsible for
issuing river forecasts and flood warnings for the United States.
This information is provided in order to protect life and property as
well as to enhance the national economy. In cooperation with
national, state and local agencies, as well as private organizations
and the public, the NWS determines the river levels which correspond
to the beginning of significant damage from high water. This level of
water at a given river location is termed flood stage. The NWS issues
special river forecasts and flood warnings when levels are expected
to equal or exceed flood stage. In addition to problems caused by
flooding, various users have danger and incur risk due to river
fluctuations and river levels lower than flood stage. Examples of
these types of users of river forecast information include navigation
interests or the general public who use the river and river banks for
recreational purposes. The experimental Recreational Forecast
graphics are Internet web pages that depict the expected river levels
for the Illinois River of Oklahoma, a very popular canoe and raft
float stream. These expected stream flow levels are translated to a
river floatability index based on guidelines provided by the Illinois
River Association and the State of Oklahoma Scenic Rivers Commission.
Recreational interests can use the information to better insure a
safe experience on and near the river. |
| ADVANCED HYDROLOGIC PREDICTION SERVICE (AHPS) FLOOD INUNDATION MAP INTERFACE | The NWS River Forecast Centers produce river stage forecasts for more
than three thousand locations in the U.S. These forecasts reference
numeric gage heights at a single site along the river, generally in
or near a city. Flood inundation maps are available for specific NWS
forecast points where a flood inundation library has been developed
through a partnership with Federal, state, and/or local agencies.
Flood Inundation Maps show the extent of flooding expected spatially
over a given area. This will indicate where roadways, streets,
buildings, airports, etc., are likely to be impacted by floodwaters.
Combined with river observations and NWS river forecasts, inundation
maps provide decision-makers additional information needed to better
mitigate the impacts of flooding and build more resilient
communities.
|
| Air Quality Index (AQI) | The Air Quality Index (AQI)), also know as Clearing Index and
Ventilation Index is both a text and graphical product produced by
forecasters in support of the Fire Weather Program. The AQI has been
used for many years by health and land management officials to help
determine pollution and smoke dispersion on any given day. AQI
numbers range from 0 (no dispersion) to 1000+ (excellent dispersion).
When used as a Ventilation Index, values range from 0 to 100,000 |
| Airman's Meteorological Advisories (AIRMET) | AIRMETs are concise descriptions in abbreviated language of the
development and occurrence or expected occurrence in time and space
of specified en-route weather phenomena issued by the National
Weather Services Aviation Weather Center, Alaskan Aviation Weather
Unit, and Weather Forecast Office Honolulu. AIRMET phenomena can
affect the safety of aircraft operations. Bulletins contain details
of potentially hazardous conditions over the continental United
States, Alaska, Hawaii, and adjacent waters. An AIRMET will be issued
when any of the following weather phenomena occur and affect an area
of at least 3,000 square miles:
Moderate icing,
Moderate turbulence,
Sustained surface wind of 30 knots or more,
Ceilings less than 1,000 feet and/or visibility less than miles
affecting over 50 percent of an area at any one time or,
Extensive mountain obscuration (may be less than 3000 square miles
for Pacific Ocean islands).
|
| Alaska Graphic Area Forecast | The Alaska Graphic Area Forecast (GFA) is a graphical representation
of forecasts contained in the text Area Forecasts (FA) for Alaska.
The GFA is comprised of four separate graphics produced using NMAP
software at the Alaska Aviation Weather Unit (AAWU). |
weather.gov 
