Winter Preview 2020-21
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February 2021: Extreme Cold, Snow, and Ice in the South Central U.S
NASA/NOAA NASA/NOAA FEBRUARY 2021: EXTREME COLD,SNOW, AND ICE IN THE SOUTH CENTRAL U.S. APRIL 2021 | DARRIAN BERTRAND AND SIMONE SPEIZER SUGGESTED CITATION Bertrand, D. and S. Speizer, 2021: February 2021: Extreme Cold, Snow, and Ice in the South Central U.S. Southern Climate Impacts Planning Program, 30 pp. http://www.southernclimate.org/documents/Feb2021ExtremeCold.pdf. TABLE OF CONTENTS 1 2 6 INTRODUCTION WEATHER RECORDS & PATTERN CLIMATOLOGY 15 19 ENERGY WATER 10 15 19 20 HEALTH INFRASTRUCTURE COMPARISON IMPACTS TO HISTORIC 21 22 EVENTS ECONOMY ENVIRONMENT 23 SOCIETY 24 25 26 LOCAL HAZARD SUMMARY REFERENCES MITIGATION SUCCESSES PAGE | 01 INTRODUCTION INTRODUCTION February 2021’s weather was a wild ride for many across the U.S. Many records were broken from a strong arctic blast of cold air that extended south of the Mexico border, and wintry precipitation covered much of the country. While the extent of the winter storm traversed coast to coast, this summary will cover the Southern Climate Impacts Planning Program (SCIPP) region of Oklahoma, Texas, Arkansas, and Louisiana (Fig. 1). We'll be diving into the weather pattern, records, the Figure 1. SCIPP Region context of this event relative to climatology, past historic events, impacts, and hazard mitigation successes. EVENTHIGHLIGHTS Extreme Cold Temperature and Snow: Nearly 3,000 long-term temperature records were broken/tied in February in the SCIPP region. All 120 OK Mesonet stations were below 0°F at the same time for the first time. Some areas were below freezing for nearly 2 weeks. This was the coldest event in the region in over 30 years. -
Coastal Hazards Primers
Coastal Hazards Primers Table of Contents Introduction ............................................................................................................................................................................. 2 Flooding .................................................................................................................................................................................... 2 Background ......................................................................................................................................................................... 2 Flood Mapping .................................................................................................................................................................... 2 Flood Management ........................................................................................................................................................... 2 Flood Mitigation .................................................................................................................................................................. 2 Flood Response and Recovery ............................................................................................................................................ 3 Wind ........................................................................................................................................................................................... 3 Background ........................................................................................................................................................................ -
A Hyperactive 2020 Hurricane Season
SHORELINES – January 2021 As presented to the Island Review magazine A Hyperactive 2020 Hurricane Season The 2020 Hurricane Season (Figure 1) made history on three noticeable accounts – (1) for the most cyclones (tropical storms and hurricanes) recorded for a single season at 30, (2) for the most cyclones in any month (10 in September), and (3) for the most U.S. Landfalling cyclones in a season at 12. Our closest “near miss” here along the Crystal Coast came when hurricane Isaias made landfall as a Category 1 hurricane south of Cape Fear in Brunswick County during the waning hours of August 3rd. And by virtue of doing so, became the earliest fifth named cyclone to make landfall in the U.S. (another record). In some regards this level of activity was expected – an above average forecast was predicted based predominantly upon the premise that sea surface temperatures were expected to be warmer-than-normal in the Main Development Region (MDR) of the Atlantic and weak tradewinds were also expected in the eastern part of the MDR. Hence the fuel (warm water) was in place for cyclones to develop and little shear was aloft to stymie any cyclones that did begin to form. Also, weak La Niña or “El Niño Southern Oscillation (ENSO) cool phase” conditions were predicted to be present during the peak of hurricane season, which also can favor, rather than suppress cyclone development. Figure 1 – Graphic prepared by the National Weather Service (NOAA) depicting cyclone tracks and intensities reported for the 2020 hurricane season. - 1 - In reality La Niña conditions were stronger than anticipated and this phenomenon coupled with the warm waters and lack of shear described above proved to be a recipe for a “hyperactive” season as we will detail below, and was notable for a high degree of late season activity in the months of October and November. -
February 2021 Historical Winter Storm Event South-Central Texas
Austin/San Antonio Weather Forecast Office WEATHER EVENT SUMMARY February 2021 Historical Winter Storm Event South-Central Texas 10-18 February 2021 A Snow-Covered Texas. GeoColor satellite image from the morning of 15 February, 2021. February 2021 South Central Texas Historical Winter Storm Event South-Central Texas Winter Storm Event February 10-18, 2021 Event Summary Overview An unprecedented and historical eight-day period of winter weather occurred between 10 February and 18 February across South-Central Texas. The first push of arctic air arrived in the area on 10 February, with the cold air dropping temperatures into the 20s and 30s across most of the area. The first of several frozen precipitation events occurred on the morning of 11 February where up to 0.75 inches of freezing rain accumulated on surfaces in Llano and Burnet Counties and 0.25-0.50 inches of freezing rain accumulated across the Austin metropolitan area with lesser amounts in portions of the Hill Country and New Braunfels area. For several days, the cold air mass remained in place across South-Central Texas, but a much colder air mass remained stationary across the Northern Plains. This record-breaking arctic air was able to finally move south into the region late on 14 February and into 15 February as a strong upper level low-pressure system moved through the Southern Plains. As this system moved through the region, snow began to fall and temperatures quickly fell into the single digits and teens. Most areas of South-Central Texas picked up at least an inch of snow with the highest amounts seen from Del Rio and Eagle Pass extending to the northeast into the Austin and San Antonio areas. -
How to Prepare for a Winter Storm
Hurricane Safety Tips The 2015 hurricane season will be one of the quietest seasons since the mid 20th century, according to Dr. Phillip J. Klotzbach, leader of tropical forecasting, from Colorado State University. The numbers: 7 named storms, 3 hurricanes, and 1 major hurricane (category 3 or higher). It appears quite likely that an El Nino of at least moderate strength will develop this summer and fall. The tropical and subtropical Atlantic is quite cool at present. He anticipates a below-average probability for major hurricanes making landfall along the United States coastline and in the Caribbean. Despite the forecast for below- average activity, coastal residents are reminded that it only takes one hurricane making landfall to make it an active season for them. People should prepare the same for every season, regardless of how much activity is predicted. Even though a below-average season is expected, it is worth noting that Hurricane Andrew, a category 5 storm that devastated Florida in 1992, occurred in an inconsequential year with only 7 storms for the season. For your information, a tropical storm has sustained winds of 39 mph; it becomes a hurricane when its winds reach 74 mph. The Atlantic hurricane season starts June 1and lasts until November 30. The following names will be used for named storms that form in the Atlantic Ocean in 2015. The first name to be used this season is Ana, followed by Bill, Claudette, Erika, Fred, Grace, Henri, Ida, Joaquin, Kate, Larry, Mindy, Nicholas, Odette, Peter, Rose, Sam, Teresa, Victor, and Wanda. What is a hurricane? A hurricane is a type of tropical cyclone, the general term for all circulating weather systems over tropical waters. -
The Winter Season December 1, 1982-February 28, 1983
CONTINENTAL SURVEY The Winter Season December 1, 1982--February 28, 1983 Abbreviations frequently used in Regional Reports ad.: adult, Am.: American, c.: central, C: Celsius, CBC: Reservoir, not Reservation,R.: River, S.P.: State Park, sp.: Christmas Bird Count, Cr.: Creek, Com.: Common, Co.: species,spp.: speciesplural, ssp.: subspecies,Twp.: Town- County, Cos.: Counties,et al.: and others,E.: Eastern(bird ship, W.: Western(bird name), W.M.A.: Wildlife Manage- name),Eur.: European,Eurasian, F: Fahrenheit,fide:reported ment Area, v.o.: various observers, N,S,W,E,: direction of by, F.&W.S.: Fish& Wildlife Service,Ft.: Fort, imm.: imma- motion, n., s., w., e.,: direction of location, >: more than, <: ture, 1.: lsland,Is.: Islands,Isles, Jct.: Junction,juv.: juvenile, fewerthan, +: approximately,or estimatednumber, c•: male, L.: Lake, m.ob.: manyobservers, Mt.: Mountain, Mts.: Moun- q?:female, 0: imm.or female,*: specimen,ph.: photographed, tains, N.F.: National Forest, N.M.: National Monument, ?: documented,ft: feet, mi: miles, m: meters,kin: kilometers, N.P.: National Park, N.W.R.: Nat'l Wildlife Refuge, N.: date with a + (e.g., Mar. 4+): recordedbeyond that date. Northern(bird name), Par.: Parish,Pen.: Peninsula,P.P.: Pro- Editorsmay also abbreviateoften-cited locations or organiza- vincial Park, Pt.: Point, not Port, Ref.: Refuge, Res.: tions. NORTHEASTERN MARITIME REGION /Richard S. Heil This wasthe year that winter largely passed us by in the Northeast. Decemberand early Januaryaveraged exceptionally mild and bare groundand open water were the rolerather than the exceptions.As a result,waterfowl and gullslingered in the northand inlandin good numbers,while passerinesapparently remained widely dispersed throughoutthe Region, rotbet than concentrating at feeders or in shel- teredthickets. -
ESSENTIALS of METEOROLOGY (7Th Ed.) GLOSSARY
ESSENTIALS OF METEOROLOGY (7th ed.) GLOSSARY Chapter 1 Aerosols Tiny suspended solid particles (dust, smoke, etc.) or liquid droplets that enter the atmosphere from either natural or human (anthropogenic) sources, such as the burning of fossil fuels. Sulfur-containing fossil fuels, such as coal, produce sulfate aerosols. Air density The ratio of the mass of a substance to the volume occupied by it. Air density is usually expressed as g/cm3 or kg/m3. Also See Density. Air pressure The pressure exerted by the mass of air above a given point, usually expressed in millibars (mb), inches of (atmospheric mercury (Hg) or in hectopascals (hPa). pressure) Atmosphere The envelope of gases that surround a planet and are held to it by the planet's gravitational attraction. The earth's atmosphere is mainly nitrogen and oxygen. Carbon dioxide (CO2) A colorless, odorless gas whose concentration is about 0.039 percent (390 ppm) in a volume of air near sea level. It is a selective absorber of infrared radiation and, consequently, it is important in the earth's atmospheric greenhouse effect. Solid CO2 is called dry ice. Climate The accumulation of daily and seasonal weather events over a long period of time. Front The transition zone between two distinct air masses. Hurricane A tropical cyclone having winds in excess of 64 knots (74 mi/hr). Ionosphere An electrified region of the upper atmosphere where fairly large concentrations of ions and free electrons exist. Lapse rate The rate at which an atmospheric variable (usually temperature) decreases with height. (See Environmental lapse rate.) Mesosphere The atmospheric layer between the stratosphere and the thermosphere. -
HURRICANE TEDDY (AL202020) 12–23 September 2020
r d NATIONAL HURRICANE CENTER TROPICAL CYCLONE REPORT HURRICANE TEDDY (AL202020) 12–23 September 2020 Eric S. Blake National Hurricane Center 28 April 2021 NASA TERRA MODIS VISIBLE SATELLITE IMAGE OF HURRICANE TEDDY AT 1520 UTC 22 SEPTEMBER 2020. Teddy was a classic, long-lived Cape Verde category 4 hurricane on the Saffir- Simpson Hurricane Wind Scale. It passed northeast of the Leeward Islands and became extremely large over the central Atlantic, eventually making landfall in Nova Scotia as a 55-kt extratropical cyclone. There were 3 direct deaths in the United States due to rip currents. Hurricane Teddy 2 Hurricane Teddy 12–23 SEPTEMBER 2020 SYNOPTIC HISTORY Teddy originated from a strong tropical wave that moved off the west coast of Africa on 10 September, accompanied by a large area of deep convection. The wave was experiencing moderate northeasterly shear, but a broad area of low pressure and banding features still formed on 11 September a few hundred n mi southwest of the Cabo Verde Islands. Convection decreased late that day, as typically happens in the evening diurnal minimum period, but increased early on 12 September. This convection led to the development of a well-defined surface center, confirmed by scatterometer data, and the formation of a tropical depression near 0600 UTC 12 September about 500 n mi southwest of the Cabo Verde Islands. The “best track” chart of the tropical cyclone’s path is given in Fig. 1, with the wind and pressure histories shown in Figs. 2 and 3, respectively. The best track positions and intensities are listed in Table 1.1 After the depression formed, further development was slow during the next couple of days due to a combination of northeasterly shear, dry air in the mid-levels and the large size and radius of maximum winds of the system. -
Storm Watcher Pdf, Epub, Ebook
STORM WATCHER PDF, EPUB, EBOOK Maria V Snyder | 228 pages | 05 May 2013 | Leap Books, LLC | 9781616030339 | English | Powell, WY, United States National Hurricane Center Tropical Storm Wilfred forms over the eastern Atlantic. Tropical Depression 22 forms in the Gulf of Mexico. September 17, September 14, Hurricane Teddy forms over the central Atlantic. September 16, Hurricane Sally has formed over the Gulf of Mexico. September 12, Paulette is now a hurricane over the northwestern Atlantic. September 13, The NHC indicates that Nana has become a hurricane and is expected to make landfall along the coast of Belize tonight. September 02, Tropical Storm Omar forms off the east coast of the United States. September 01, Marco has become a hurricane and could make landfall near the Louisiana coast on Monday. August 23, Tropical Storm Laura becomes a hurricane , forecast to reach category 3 before making landfall on the south coast of the USA. August 25, Tropical Storm Kyle has formed off the east coast of the United States. August 14, August 13, Tropical Depression 10 forms over the eastern Atlantic. J uly 31, Hurricane Isaias moving closer towards southern Florida. August 01, Hanna strengthens and has become the first hurricane of the Atlantic season. July 25, J uly 22, Tropical Storm Fay has formed near the coast of North Carolina. July 09, July 05, Tropical Storm Dolly forms over the north Atlantic. June 23, June 2, Tropical Storm Bertha has formed near the coast of South Carolina this morning. May 27, May 16, Storm Names for the Atlantic Hurricane Season. Tropical Storm Arthur. -
Hurricane Teddy
eVENT Hurricane Tracking Advisory Hurricane Teddy Information from NHC Advisory 40A, 8:00 AM AST Tue Sep 22, 2020 On the forecast track, the center will move over eastern Nova Scotia on Wednesday, and then near or over Newfoundland by Wednesday night. Maximum sustained winds are near 105 mph (165 km/h) with higher gusts. Although some weakening is likely later today and Wednesday, Teddy should be a strong post-tropical cyclone when it moves near and over Nova Scotia. Intensity Measures Position & Heading U.S. Landfall (NHC) Max Sustained Wind 105 mph Position Relative to 365 mi S of Halifax Nova Scotia Speed: (category 2) Land: Est. Time & Region: n/a Min Central Pressure: 950 mb Coordinates: 39.3 N, 63.5 W Trop. Storm Force Est. Max Sustained 400 miles Bearing/Speed: NNW or 335 degrees at 28 mph n/a Winds Extent: Wind Speed: Forecast Summary ■ Tropical storm conditions are expected to begin in the warning area by this afternoon. Tropical storm conditions could begin in the watch areas late today or early Wednesday. ■ Large swells generated by Teddy are affecting Bermuda, the Lesser Antilles, the Greater Antilles, the Bahamas, the east coast of the United States, and Atlantic Canada. These swells are likely to cause life-threatening surf and rip current conditions. A dangerous storm surge is expected to produce significant coastal flooding near and to the east of where the center makes landfall in Nova Scotia. Near the coast, the surge will be accompanied by very large and destructive waves. ■ Through Thursday, Teddy is expected to produce rainfall accumulations of 2 to 4 inches (50 to 100 mm) with isolated totals of 6 inches (150 mm) across sections of Atlantic Canada. -
Winter Weather Terminology
Winter Weather Terminology Watch is issued when the risk of a hazardous winter weather event has increased, but its occurrence, location, and/or timing is still uncertain. Warning or Advisory is issued when a hazardous winter weather event is occurring, is imminent, or has a high probability of occurrence. A warning is used when there is a threat to life or property. An advisory is for less serious conditions that cause inconvenience, and, if caution is not used, could lead to situations that may threaten life or property. Snow criteria for a warning is 6 inches or more in 12 hours or less, OR, 8 inches or more in 24 hours or less. Snow criteria for an advisory is 3 to 5 inches. Winter Storm Warnings and Winter Weather Advisories may be issued for a combination of elements like snow coupled with wind and blowing snow, or snow coupled with sleet and freezing rain. Sleet is pellets of ice. Sleet bounces when it hits the ground. Freezing Rain is rain that freezes when it hits the ground or objects on the ground. It forms a sheet or glaze of ice. Ice Storm is used to describe occasions when the ice from freezing rain is significant enough (1/4 inch thick or more) to cause damage. Blizzard is a storm with winds of 35 mph or higher AND visibility frequently below 1/4 mile in snow and/or blowing snow AND these conditions last three (3) hours or longer. There is no set temperature requirement for a blizzard. Wind Chill is that part of the cooling of a human body caused by moving air. -
Winter Weather Definitions and Terms
Definitions of Winter Weather Terms used by the National Weather Service As winter approaches, you should understand winter weather terms and be aware of winter weather hazards. The National Weather Service uses several terms to tell you exactly what kind of weather to expect, please review the terms below to familiarize yourself with them. 1) WINTER STORM OUTLOOK This is a statement issued when there is a chance of a major winter storms from 3 to 5 days in the future. This is meant to assist people with their long range plans. However, since the outlook is issued so far in advance, the accuracy of the prediction may be limited. 2) WINTER STORM WATCH This means there may be hazardous winter weather due to various elements such as heavy snow, sleet, or ice accumulation from freezing rain. In our region, heavy snow means 7 inches or more of accumulation in 24 hours or less. A "WATCH" is a long range prediction. They are issued at least 12 hours before the hazardous winter weather is expected to begin. When the storm becomes imminent, or has a high probability of occurring, the watch will be upgraded to a "WARNING". 3) WINTER STORM WARNING FOR HEAVY SNOW Seven inches or more of snow will fall within a 24 hour period. 4) WINTER STORM WARNING FOR SEVERE ICING Heavy accumulation of ice due to freezing rain will down trees and power lines. Electricity, or telephone communications, may be out for a long period of time. Roads may become impassable for most vehicles. 5) BLIZZARD WARNING This is issued for a combination of strong winds averaging or frequently gusting to, or above, 35 miles an hour and very low visibility due to blowing or falling snow.