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Hurricane Iota Graphics

2020-11-16 00:36:05| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Sun, 15 Nov 2020 23:36:05 GMT Wind Speed Probabilities last updated Sun, 15 Nov 2020 21:24:38 GMT

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Summary for Hurricane Iota (AT1/AL312020)

2020-11-16 00:35:56| National Hurricane Center (Atlantic)

...IOTA STRENGTHENS TO A CATEGORY 2 HURRICANE... ...EXPECTED TO BRING POTENTIALLY CATASTROPHIC WINDS, LIFE- THREATENING STORM SURGE, AND EXTREME RAINFALL IMPACTS TO CENTRAL AMERICA... As of 7:00 PM EST Sun Nov 15 the center of Iota was located near 13.3, -79.8 with movement W at 9 mph. The minimum central pressure was 964 mb with maximum sustained winds of about 100 mph.

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Hurricane Iota Public Advisory Number 10A

2020-11-16 00:35:56| National Hurricane Center (Atlantic)

Issued at 700 PM EST Sun Nov 15 2020 000 WTNT31 KNHC 152335 TCPAT1 BULLETIN Hurricane Iota Intermediate Advisory Number 10A NWS National Hurricane Center Miami FL AL312020 700 PM EST Sun Nov 15 2020 ...IOTA STRENGTHENS TO A CATEGORY 2 HURRICANE... ...EXPECTED TO BRING POTENTIALLY CATASTROPHIC WINDS, LIFE- THREATENING STORM SURGE, AND EXTREME RAINFALL IMPACTS TO CENTRAL AMERICA... SUMMARY OF 700 PM EST...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...13.3N 79.8W ABOUT 110 MI...175 KM E OF ISLA DE PROVIDENCIA COLOMBIA ABOUT 255 MI...410 KM ESE OF CABO GRACIAS A DIOS ON NIC/HON BORDER MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...964 MB...28.47 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Providencia * The coast of Nicaragua from the Honduras/Nicaragua border to Sandy Bay Sirpi * The coast of northeastern Honduras from Punta Patuca to the Honduras/Nicaragua border A Hurricane Watch is in effect for... * San Andres A Tropical Storm Warning is in effect for... * San Andres * The coast of Nicaragua from south of Sandy Bay Sirpi to Bluefields * The northern coast of Honduras from west of Punta Patuca to Punta Castilla A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Hurricane Watch means that hurricane conditions are possible within the watch area. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. Interests elsewhere in Nicaragua and Honduras should monitor the progress of Iota. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 700 PM EST (0000 UTC), the center of Hurricane Iota was located near latitude 13.3 North, longitude 79.8 West. Iota is moving toward the west near 9 mph (15 km/h). A westward to west-northwestward motion is expected through landfall. After landfall, a westward to west-southwestward motion is forecast. On the forecast track, the core of Iota will pass near or over Providencia island late tonight or Monday, and make landfall within the hurricane warning area in northeastern Nicaragua and eastern Honduras Monday night. Maximum sustained winds have increased to near 100 mph (155 km/h) with higher gusts. Rapid strengthening is expected during the next 24 hours, and Iota is forecast to be an extremely dangerous category 4 hurricane when it approaches Central America. Hurricane-force winds extend outward up to 25 miles (35 km) from the center and tropical-storm-force winds extend outward up to 125 miles (205 km). The estimated minimum central pressure based on data from the Air Force Hurricane Hunters is 964 mb (28.47 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Hurricane Iota can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT1, WMO header WTNT41 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT1.shtml. RAINFALL: Iota is expected to produce the following rainfall accumulations through Friday morning: Honduras, northern Nicaragua, Guatemala, southern Belize: 8 to 16 inches (200 to 400 mm). Isolated maximum totals of 20-30 inches (500 to 750 mm) will be possible, especially from northeast Nicaragua into northern Honduras. Costa Rica and Panama: 4 to 8 inches (100 to 200 mm), with isolated maximum totals of 12 inches (300 mm). This rainfall would lead to significant, life-threatening flash flooding and river flooding, along with mudslides in areas of higher terrain. El Salvador and southern Nicaragua: 3 to 5 inches (75 to 125 mm), with isolated maximum totals of 10 inches (250 mm). Northern Colombia: An additional 1 to 3 inches (25 to 75 mm), with isolated maximum totals near 12 inches (300 mm). WIND: Potentially catastrophic wind damage is expected where Iota's eyewall moves onshore within the Hurricane Warning area in Nicaragua and Honduras area beginning late Monday with tropical storm conditions expected Monday morning. Hurricane conditions are expected on the island of Providencia overnight with tropical storm conditions expected this evening. Tropical storm conditions are expected to begin on the island of San Andres later this evening with hurricane conditions possible there early Monday. Tropical storm conditions are expected in the Tropical Storm Warning area in Nicaragua by late Monday and in the warning area in Honduras by Monday night. STORM SURGE: A life-threatening storm surge will raise water levels by as much as 10 to 15 feet above normal tide levels in areas of onshore winds along the coast of Nicaragua and Honduras. Near the coast, the surge will be accompanied by large and destructive waves. SURF: Swells generated by Iota will affect much of the coast of Central America, the Yucatan Peninsula, Jamaica, and Colombia during the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1000 PM EST. $$ Forecaster Cangialosi

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Hurricane Iota Graphics

2020-11-15 21:38:19| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Sun, 15 Nov 2020 20:38:19 GMT Wind Speed Probabilities last updated Sun, 15 Nov 2020 20:38:19 GMT

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Hurricane Iota Forecast Discussion Number 10

2020-11-15 21:37:21| National Hurricane Center (Atlantic)

Issued at 400 PM EST Sun Nov 15 2020 000 WTNT41 KNHC 152037 TCDAT1 Hurricane Iota Discussion Number 10 NWS National Hurricane Center Miami FL AL312020 400 PM EST Sun Nov 15 2020 The satellite presentation of Iota has continued to improve this afternoon. A ragged eye has become apparent in visible satellite imagery, with excellent banding features surrounding it. An Air Force Reserve Hurricane Hunter aircraft measured a minimum central pressure of 977 mb during its first pass through the center earlier this afternoon, and recorded around 974 mb on its second pass. Somewhat surprisingly, the plane only measured peak 700-mb flight-level winds of 74 kt and SFMR winds of 68 kt. Those winds support an intensity slightly lower than what was previously estimated, but given the low central pressure and downward trend, plus the fact that the plane only made a single pass in each quadrant, it is possible that the maximum winds were not sampled. In addition, the satellite presentation and pressure fall may be preceding the winds slightly. Therefore, the initial is again set at 80 kt. Another Air Force Reserve reconnaissance aircraft is en route and should provide additional information on Iota's intensity this evening. Very favorable atmospheric and oceanic conditions consisting of low vertical wind shear and warm waters are expected to lead to rapid strengthening until the center crosses the coast of Central America. The NHC intensity forecast again calls for Iota to reach major hurricane strength tonight, and become an extremely dangerous category 4 hurricane before it reaches the coast of Central America Monday night. The NHC intensity forecast is similar to the previous advisory and shows a peak slightly above the latest HFIP corrected consensus model. After landfall, rapid weakening should occur as Iota moves over the mountainous terrain of Central America. Iota is moving westward to west-northwestward at about 8 kt. The track forecast philosophy is unchanged from before. A strong mid-level ridge that extends across the western Atlantic and Florida will steer Iota westward to west-northwestward through landfall Monday night. Once Iota moves over Central America, a westward to west-southwestward motion is expected. The updated NHC track forecast has been adjusted southward through 24 hours, but little overall change was required thereafter. The official forecast lies near the middle of the tightly clustered dynamical model envelope. In addition to potentially catastrophic winds, Iota is expected to bring a life-threatening storm surge and extreme rainfall impacts to portions of Central America. This comes less than two weeks after Hurricane Eta significantly impacted the area. Key Messages: 1. Iota is expected to continue to rapidly intensify and be an extremely dangerous category 4 hurricane when it approaches the coast of Central America on Monday. Potentially catastrophic winds and a life-threatening storm surge are expected along portions of the coast of northeastern Nicaragua and eastern Honduras where a hurricane warning is in effect. 2. Hurricane conditions are expected and storm surge impacts are possible on Providencia tonight and Monday. Tropical storm conditions are expected and hurricane conditions are possible on San Andres. 3. Through Friday morning, heavy rainfall from Iota will likely lead to life-threatening flash flooding and river flooding across portions of Central America. Flooding and mudslides in Honduras and Nicaragua could be exacerbated by Hurricane Etas recent effects there, resulting in significant to potentially catastrophic impacts. FORECAST POSITIONS AND MAX WINDS INIT 15/2100Z 13.3N 79.3W 80 KT 90 MPH 12H 16/0600Z 13.6N 80.5W 100 KT 115 MPH 24H 16/1800Z 14.0N 82.1W 120 KT 140 MPH 36H 17/0600Z 14.3N 83.6W 105 KT 120 MPH...INLAND 48H 17/1800Z 14.4N 84.9W 60 KT 70 MPH...INLAND 60H 18/0600Z 14.3N 86.3W 35 KT 40 MPH...INLAND 72H 18/1800Z 14.1N 87.9W 25 KT 30 MPH...INLAND 96H 19/1800Z...DISSIPATED $$ Forecaster Brown

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