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NATIONAL TECHNICAL INFORMATION MESSAGE 94-42
NATIONAL WEATHER SERVICE HEADQUARTERS
300 PM EDT FRI SEP 23 1994
TO: ALL NWS OFFICES, DOMESTIC DATA SERVICE SUBSCRIBERS,
FAA USERS, FAA WEATHER MESSAGE SWITCHING CENTER,
US AIR FORCE, OTHER NWS DATA USERS
FROM: FRED ZBAR
ACTING CHIEF, SERVICES DEVELOPMENT BRANCH
SUBJECT: EXPERIMENTAL ULTRAVIOLET INDEX FORECASTS -
CALCULATION OF SOLAR NOON
REFERENCE: NATIONAL TECHNICAL INFORMATION MESSAGE, 94-17, DATED
JUNE 24, 1994, SUBJECT: EXPERIMENTAL ULTRAVIOLET
INDEX FORECASTS
(THE FOLLOWING INFORMATION WAS PROVIDED BY CRAIG LONG OF THE
CLIMATE ANALYSIS CENTER, NATIONAL METEOROLOGICAL CENTER.)
Questions have recently surfaced about the calculation of solar
noon with respect to the valid time of the Experimental UltraViolet
Index (UVI) forecasts. The UVI forecast provides the next day's
(approximately 30 hours in advance) ultraviolet intensity at the
earth's surface over the one-hour period around solar noon.
Solar noon is defined as the time when the maximum exposure to
ultraviolet radiation from the sun's rays may be felt.
Solar noon for any location is a constant and may be calculated
using the following information. Solar noon is at 1200 local
standard time on a particular central time longitude. The
central time longitudes are 75W, 90W, 105W, 120W, and 135W. For
every degree of longitude away from the central time longitude,
the solar time changes by four minutes. Eastward of the central
longitude, the time of solar noon is earlier; westward, the time
of solar noon is later.
For example, if your station is at 96W longitude, the time of
solar noon is 12:24 local standard time. If your station is at
85W longitude, the time of solar noon is 11:40 local standard
time.
Solar noon advances by one hour during local daylight time.
If you have questions concerning solar noon calculations, call
Craig Long at 301-763-8071. For more general information on the
experimental Ultraviolet Index, call the NWS Office of Public
Affairs at 301-713-0622.
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
300 PM EDT FRI SEP 23 1994
TO: NATIONAL WEATHER SERVICE (NWS) EMPLOYEES, FAMILY OF
SERVICES (FOS) SUBSCRIBERS, NOAA WEATHER WIRE SERVICE
(NWWS) SUBSCRIBERS, OTHER NWS PRODUCT USERS
FROM: DONALD R. WERNLY, CHIEF, WARNING AND FORECAST BRANCH
SUBJECT: GREEN BAY, WISCONSIN WEATHER SERVICE OFFICE'S
SHORT-FUSE COUNTY WARNING AREA EXPANDS...EFFECTIVE
DECEMBER 1, 1994
Effective Thursday December 1, 1994 at 8:00 a.m. Central Standard
Time, the National Weather Service (NWS) will transfer short-fuse
warning responsibility for 7 counties in Wisconsin, (table 1) TO
the Weather Service Office (WSO) in Green Bay (GRB), Wisconsin.
Four (4) counties will be transferred FROM the Weather Service
Forecast Office (WSFO) in Milwaukee (MKE), Wisconsin. Two (2)
counties will be transferred FROM the WSO in Duluth (DLH),
Minnesota. One (1) county will be transferred FROM the WSO in
Madison (MSN), Wisconsin.
WSO GRB will issue short-fuse warning products (Table 2) and
related products that give follow-up information on the warnings
(Table 3). For holders of NWS Operations Manual Chapter C-47,
County Warning Areas, this transfer is the 42nd update for 1994.
Because of this county warning transfer, subscribers to the NOAA
Weather Wire Service (NWWS) and the Family of Services (FOS) must
take appropriate action to receive the short-fuse warnings and
related products for these counties using the GRB identifier
(Tables 2 and 3) instead of the MKE, DLH, or MSN identifiers.
The Universal Generic Codes (UGC) will remain unchanged (as shown
in Table 1).
Table 1.
County UGC ZONE UGC COUNTY from to
code code
Vilas WIZ005- WIC125- DLH GRB
Oneida WIZ010- WIC085- DLH GRB
Lincoln WIZ018- WIC069- MKE GRB
Marathon WIZ030- WIC073- MKE GRB
Wood WIZ035- WIC141- MKE GRB
Portage WIZ036- WIC097- MKE GRB
Waushara WIZ045- WIC137- MSN GRB
Table 2. The following are short-fuse warning products for the 7
counties transferred to GRB. UGC county codes (C), are
used in these products.
Warning product for: AFOS/NWWS ID WMO header (for FOS)
Tornadoes MKETORGRB WFUS1 KGRB
Severe Thunderstorms MKESVRGRB WUUS1 KGRB
Flash Floods MKEFFWGRB WRUS1 KGRB
Table 3. The following are key related products for the counties
transferred to GRB. UGC zone codes (Z), are used in
these.
Related products AFOS/NWWS ID WMO header for (FOS)
Special weather statement MKESPSGRB WWSU35 KGRB
Severe weather statement MKESVSGRB WWUS34 KGRB
Civil emergency message MKECEMGRB MMUS40 KGRB
Public info. statement MKEPNSGRB ABUS34 KGRB
* Winter weather warnings MKEWSWGRB WWUS46 KGRB
* Non-precipitation warning MKENPWGRB WWUS45 KGRB
Short-term forecast MKENOWGRB FXUS21 KGRB
Flash flood statement MKEFFSGRB RWUS32 KGRB
Local storm report MKELSRGRB WWUS30 KGRB
* For emergency backup to WSFO MKE.
WSFO MKE will continue to issue the following products for
longer-fuse events affecting these counties.
products AFOS/NWWS ID WMO header (for FOS)
Special weather statement MKESPSMKE WWSU35 KMKE
Severe weather statement MKESVSMKE WWUS34 KMKE
Civil emergency message MKECEMMKE MMUS40 KMKE
Public info. statement MKEPNSMKE ABUS34 KMKE
Winter weather warnings MKEWSWMKE WWUS46 KMKE
Non-precipitation warning MKENPWMKE WWUS45 KMKE
If you have further questions, you may contact the following:
Michael J. Szkil (Meteorologist-In-Charge)
National Weather Service Forecast Office, NOAA
2485 South Point Rd.
Green Bay, Wisconsin 54313-5522
414-494-5845
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