A joint service of the UK Ag Weather Center and the National Weather Service.
National Weather Service Shreveport LA 504 PM CDT Fri Mar 23 2018 .DISCUSSION... This afternoon a tight pressure gradient between a large surface low pressure system over the Rockies and Southern Plains and surface high pressure over the Eastern U.S. continued to produce strong and gusty Southerly winds of 15-20 MPH with higher gusts up to 30-35 MPH across much of East and Northeast Texas, Southeast Oklahoma and the immediate adjacent sections of Southwest Arkansas and Northwest Louisiana. Have extended the Lake Wind Advisory until 1 AM CDT due to the expected gradient to remain across the area. The winds may continue elevated after 1 AM for parts of East and Northeast Texas, but should be below the Lake Wind Advisory criteria. The pattern aloft shows an amplified upper ridge from the Western Gulf of Mexico into the Central sections of the country and into Canada with a trough over the Eastern Atlantic and a closed upper low over the Pacific Northwest with trough down the West Coast. A short wave trough of low pressure was moving out of the Rockies and moving into the Ridge aloft. From the surface low over the Plains a dry line will trail Southwest off of a cold front reaching from the Surface low over South Oklahoma and into the Pan Handle of Texas late tonight with a few showers expected to form ahead of the features. By mid day Saturday the surface low will be moving across the Middle Mississippi Valley with the cold front overtaking the dry line and providing a small chance of showers for our more Northern zones over Southeast Oklahoma and South Arkansas. The cold front will be moving into Northeast Texas and near the Louisiana/Arkansas border late Saturday night providing the area with a slight chance of showers to near the Interstate 2o corridor and North. The upper short wave will be shifting to the East away from the region and the boundary will become nearly stationary during Sunday and lift back to the Northeast as a warm front and have introduced mention of isolated thunderstorms. Rain chances will continue to increase as the upper ridge of high pressure leans to the East along the East Coast and down into the Northeast Gulf of Mexico. To the West an upper level trough of low pressure will start to close off near the Four Corners Region resulting in a slow progression of the upper pattern resulting in a Southwest flow into the forecast area with a series of disturbances to go along with a surface high pressure anchored over the Eastern U.S. providing additional low level gulf moisture supply. This pattern will set the stage for our Tuesday through Thursday wet pattern with locally heavy rainfall and the potential for flash flooding. flooding, and river flooding. The water runoff from the expected heavy rainfall will affect the forecast area through the end of March and into the first week of April. The exact axis of heavy rain is uncertain at this time, but many locations will receive three to four inches with some higher amounts of five to six inches. These values are preliminary and can change as the pattern sets up. There will be a chance of storms becoming severe with the approach and passage of cold fronts. The upper low will become an open wave near mid week as it ejects East across Texas and Oklahoma sending a cold front into the Four State Region on Thursday and may bring an end to the rainfall by Thursday night. A weak short wave may provide a small chance of rain in the broad upper trough over the Conus as it passes on Friday. Otherwise rain chances will end and last a dry pattern through the weekend. /06/National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]
Click here for UKAWC Point Agricultural, Lawn & Garden Forecast/Outlook in case of corrupt tables.
Regional Hourly Observations For LOWER ST. MARTIN County
SWR not available
Current Temperatures, Dewpoint, RH, Wind, Surface 4-Panel
Current Agricultural Weather Conditions in Louisiana
Based on observations at 500pm CDT, Friday March 23, 2018
Across Louisiana...temperatures are near 78 degrees north, near 75 degrees central, and near 72 degrees south. Current sky conditions are partly sunny north, partly sunny central, and fair south. In the north, relative humidity is near 44%, and the dew point is near 55 degrees. In the central part of the state, relative humidity is near 49%, and the dew point is near 55 degrees. In the south, relative humidity is near 57%, and the dew point is near 56 degrees. Winds are coming from the south at 17 mph in the north, where conditions are not favorable for spraying due to strong winds. Winds are coming from the south at 20 mph with gusts at 30 mph in the central, where conditions are not favorable for spraying due to strong winds. Winds are coming from the south at 13 mph in the south, where conditions are not favorable for spraying due to strong winds. Based on current available observations, the highest temperature is 78 degrees at Shreveport and Manroe. The lowest temperature is 70 degrees at Slidell.
Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this Parish will these
forecasts be issued. Currently, there is no short term forecast in effect.
All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
Hazardous Weather Outlook For LOWER ST. MARTIN County, LA
310 PM CDT Fri Mar 23 2018 DAY ONE This Afternoon and Tonight River flooding will continue along portions of the Calcasieu, Atchafalaya and Sabine Rivers through tonightotherwise no hazardous weather is expected at this time. DAYS TWO THROUGH SEVEN Saturday through Thursday Flood warnings will likely continue for the above mentioned waterways into the weekend. Shower and thunderstorm chances will increase beginning late Sunday and continue through much of next week. At this time, the highest rain chances will be on Wednesday and Thursday as an upper-level low pressure system and associated surface cold front approach the area. Locally heavy rain will be the main hazards and the excessive rainfall and severe weather potential may increase Wednesday and Thursday in advance of these weather systems. SPOTTER INFORMATION STATEMENT Spotter activation will not be needed.
7-Day Forecast For LOWER ST. MARTIN Parish, LA
350 PM CDT Fri Mar 23 2018
TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
LOWER ST. MARTIN County, Louisiana Agriculture, Lawn & Garden Weather Advisory
Current Weather Advisory is NOT available
Ag. Weather Forecast Parameter Maps:Spraying Conditions , Dewpoint Temperatures, Livestock Heat Stress
Medium & Long Range Outlook For Louisiana
LOUISIANA --------------------------------------------- 6 TO 10 DAY 8 TO 14 DAY 30 DAY 90 DAY MAR 29-APR 2 MAR 31-APR 6 MAR MAR-MAY ----------- ----------- -------- --------- Temperature: Normal Normal Normal Above Precipitation: Above Below Normal Below .... Medium and long range outlooks provided by NCEP/K. Thomas Priddy5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
Friday March 23, 2018 the 82th Day of Year --------------------------------------------------- SUN Declination 1.420000 Distance 0.999721 AU Rise 07:07 EDT Set 19:22 EDT Transit Meridian 13:14 EDT Civil Twilight Begins 06:44 EDT Ends 19:45 EDT Calculations made for central point in the state. Time in ET -- and will vary due to location and elevation -- Priddy
Historical Weather And Climate Facts For Today
MARCH 23RD HISTORIC WEATHER EVENTS ...1913... A vicious tornado hit the city of Omaha NE. The tornado struck during the late afternoon on Easter Sunday, and in just twelve minutes cut a swath of total destruction five miles long and two blocks wide across the city killing 94 persons and causing 3.5 million dollars property damage. (David Ludlum) ...1916... Pocatello ID received a record 14.6 inches of snow in 24 hours. (The Weather Channel)
Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky