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Tropical Storm Cristobal Forecast Discussion Number 5
2020-06-02 22:39:49| National Hurricane Center (Atlantic)
Issued at 400 PM CDT Tue Jun 02 2020 000 WTNT43 KNHC 022039 TCDAT3 Tropical Storm Cristobal Discussion Number 5 NWS National Hurricane Center Miami FL AL032020 400 PM CDT Tue Jun 02 2020 Observations from the Hurricane Hunters around midday indicated winds to tropical storm force over the southwestern quadrant, so the cyclone was named. Since that time, scatterometer data suggested that the wind field has become a little more symmetrical. The current intensity is held at 35 kt for this advisory, which is a little above the subjective Dvorak estimates. Some strengthening could occur overnight since the cyclone is in a conducive atmospheric and oceanic environment. However, it now seems likely that the system will make landfall over eastern Mexico on Wednesday which should cause weakening. Assuming that the center emerges over the Gulf of Mexico later in the week, some re-intensification is forecast. However, stronger shear over the northern Gulf should limit the increase in strength. The official intensity forecast is close to the latest LGEM guidance. Satellite and radar imagery from Mexico indicate that the cyclone is moving slowly southward, or around 170/3 kt. The system appears to be rotating within a larger cyclonic gyre centered over eastern Mexico. The global models show that Cristobal will be trapped between two high pressure areas and have little overall movement for the next few days. However, the slow, cyclonically looping movement of the cyclone should take the center over eastern Mexico on Wednesday and Thursday. Later in the week, increasing southerly flow should steer the system northward over the Gulf of Mexico and near the northern Gulf coast by the weekend. The official track forecast lies near the latest dynamical model consensus, and is roughly in the middle of the track guidance suite. Given the spread in this guidance, there is a significant amount of uncertainty in the NHC forecast at days 4-5. Key Messages: 1. Deadly flooding has already occurred in portions of Guatemala and El Salvador, and Cristobal is expected to bring additional heavy rainfall to portions of southern Mexico, Guatemala, Honduras, and El Salvador, which could cause life-threatening flash flooding and mudslides. Refer to products from your national meteorological service for more information. 2. Tropical storm conditions will continue along the coast of Mexico where a tropical storm warning is in effect. 3. Cristobal is forecast to begin moving northward across the Gulf of Mexico on Friday, and there is a risk of storm surge, rainfall, and wind impacts this weekend along portions of the U.S. Gulf Coast from Texas to the Florida Panhandle. While it is too soon to determine the exact location, timing, and magnitude of these impacts, interests in these areas should monitor the progress of Cristobal and ensure they have their hurricane plan in place. FORECAST POSITIONS AND MAX WINDS INIT 02/2100Z 19.1N 92.5W 35 KT 40 MPH 12H 03/0600Z 18.8N 92.6W 40 KT 45 MPH 24H 03/1800Z 18.4N 92.4W 35 KT 40 MPH...INLAND 36H 04/0600Z 18.2N 91.8W 30 KT 35 MPH...INLAND 48H 04/1800Z 18.5N 91.6W 30 KT 35 MPH...INLAND 60H 05/0600Z 19.1N 91.4W 35 KT 40 MPH...OVER WATER 72H 05/1800Z 20.4N 91.5W 40 KT 45 MPH...OVER WATER 96H 06/1800Z 23.7N 91.2W 45 KT 50 MPH...OVER WATER 120H 07/1800Z 28.0N 91.5W 55 KT 65 MPH...OVER WATER $$ Forecaster Pasch
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