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FLORIDA
STORMS
Hurricane Hanna
LOCATED
10 MI NW OF PORT MANSFIELD TEXAS
WINDS
85 MPH
PRESSURE
975 MB
MOVING
WSW AT 8 MPH
From the National Hurricane Center at 700 PM CDT Sat Jul 25 2020
EYE OF HANNA OVER SOUTHERN TEXAS
TAP LINKS BELOW TO FOCUS
key messages
Alerts
hazards
summary
DISCUSSION

1. Life-threatening storm surge will continue along portions of the Texas coast from Port Mansfield to Sargent, where a Storm Surge Warning is in effect. Residents in these locations should follow advice given by local emergency officials.

2. Hurricane conditions will continue within the Hurricane Warning area along the Texas coast through this evening. Strong winds will also spread inland across portions of South Texas where Tropical Storm and Hurricane Warnings are in effect.

3. Hanna is expected to produce heavy rains across portions of southern Texas and northeastern Mexico. These rains will result in life-threatening flash flooding and isolated minor to moderate river flooding.xx

1. Life-threatening storm surge will continue along portions of the Texas coast from Port Mansfield to Sargent, where a Storm Surge Warning is in effect. Residents in these locations should follow advice given by local emergency officials.

2. Hurricane conditions will continue within the Hurricane Warning area along the Texas coast through this evening. Strong winds will also spread inland across portions of South Texas where Tropical Storm and Hurricane Warnings are in effect.

3. Hanna is expected to produce heavy rains across portions of southern Texas and northeastern Mexico. These rains will result in life-threatening flash flooding and isolated minor to moderate river flooding.xx

CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for...
- Port Mansfield to Sargent Texas

A Hurricane Warning is in effect for...
- Port Mansfield to Port Aransas Texas

A Tropical Storm Warning is in effect for...
- Barra el Mezquital Mexico to Port Mansfield Texas
- Port Aransas to Port O'Connor Texas

A Storm Surge Warning means there is a danger of lifethreatening inundation, from rising water moving inland from the coastline, during the next 24 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a lifethreatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials.

A Hurricane Warning means that hurricane conditions are occurring within the warning area. Preparations to protect life and property should have already been completed.

A Tropical Storm Warning means that tropical storm conditions are occurring within the warning areas.

Interests elsewhere along the Texas and Louisiana coasts should monitor the progress of Hanna. Interests in northeastern Mexico should also monitor the progress of this hurricane.

For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office.

CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for...
- Port Mansfield to Sargent Texas

A Hurricane Warning is in effect for...
- Port Mansfield to Port Aransas Texas

A Tropical Storm Warning is in effect for...
- Barra el Mezquital Mexico to Port Mansfield Texas
- Port Aransas to Port O'Connor Texas

A Storm Surge Warning means there is a danger of lifethreatening inundation, from rising water moving inland from the coastline, during the next 24 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a lifethreatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials.

A Hurricane Warning means that hurricane conditions are occurring within the warning area. Preparations to protect life and property should have already been completed.

A Tropical Storm Warning means that tropical storm conditions are occurring within the warning areas.

Interests elsewhere along the Texas and Louisiana coasts should monitor the progress of Hanna. Interests in northeastern Mexico should also monitor the progress of this hurricane.

For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office.

Key messages for Hanna can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml.

STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide...

Baffin Bay to Port Aransas including Corpus Christi Bay...46 ft

Port Mansfield to Baffin Bay...24 ft

North of Port Aransas to Sargent including Copano Bay , Aransas Bay, San Antonio Bay, and Matagorda Bay...24 ft

Mouth of the Rio Grande to Port Mansfield...13 ft

North of Sargent to High Island including Galveston Bay...12 ft

The deepest water will occur along the immediate coast near and to the right of the landfall location. Surgerelated flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office.

WIND: Hurricane conditions will continue in portions of the hurricane warning area through this evening. Tropical storm conditions are occuring in portions of the tropical storm warning area and will spread farther inland tonight and Sunday.

RAINFALL: Hanna is expected to produce total rain accumulations of 6 to 12 inches, with isolated maximum amounts of 18 inches through Monday in south Texas and into the Mexican states of Coahuila, Nuevo Leon, and northern Tamaulipas. This rain will produce lifethreatening flash flooding, rapid rises on small streams, and isolated minor to moderate river flooding.

Hanna is also expected to produce 3 to 5 inches of rain along the upper Texas and Louisiana coasts.

SURF: Swells generated by Hanna will continue to affect much of the Texas and Louisiana coasts for another day or so. These swells are likely to cause lifethreatening surf and rip current conditions. Please consult products from your local weather office.

TORNADOES: A few tornadoes are possible this evening and overnight over parts of the lower to middle Texas coastal plain.

Key messages for Hanna can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml.

STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide...

Baffin Bay to Port Aransas including Corpus Christi Bay...46 ft

Port Mansfield to Baffin Bay...24 ft

North of Port Aransas to Sargent including Copano Bay , Aransas Bay, San Antonio Bay, and Matagorda Bay...24 ft

Mouth of the Rio Grande to Port Mansfield...13 ft

North of Sargent to High Island including Galveston Bay...12 ft

The deepest water will occur along the immediate coast near and to the right of the landfall location. Surgerelated flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office.

WIND: Hurricane conditions will continue in portions of the hurricane warning area through this evening. Tropical storm conditions are occuring in portions of the tropical storm warning area and will spread farther inland tonight and Sunday.

RAINFALL: Hanna is expected to produce total rain accumulations of 6 to 12 inches, with isolated maximum amounts of 18 inches through Monday in south Texas and into the Mexican states of Coahuila, Nuevo Leon, and northern Tamaulipas. This rain will produce lifethreatening flash flooding, rapid rises on small streams, and isolated minor to moderate river flooding.

Hanna is also expected to produce 3 to 5 inches of rain along the upper Texas and Louisiana coasts.

SURF: Swells generated by Hanna will continue to affect much of the Texas and Louisiana coasts for another day or so. These swells are likely to cause lifethreatening surf and rip current conditions. Please consult products from your local weather office.

TORNADOES: A few tornadoes are possible this evening and overnight over parts of the lower to middle Texas coastal plain.

At 700 PM CDT (0000 UTC), the eye of Hurricane Hanna was located near latitude 26.7 North, longitude 97.5 West. Hanna is moving toward the westsouthwest near 8 mph (13 km/h) and this motion is expected to continue through Sunday. On the forecast track, the center of Hanna should continue to move farther inland over southern Texas tonight and move into northeastern Mexico on Sunday.

Maximum sustained winds are near 85 mph (140 km/h) with higher gusts. Rapid weakening is expected as Hanna moves farther inland.

Hurricaneforce winds extend outward up to 30 miles (45 km) from the center and tropicalstormforce winds extend outward up to 90 miles (150 km).

The estimated minimum central pressure based on surface observations is 975 mb (28.79 inches).

At 700 PM CDT (0000 UTC), the eye of Hurricane Hanna was located near latitude 26.7 North, longitude 97.5 West. Hanna is moving toward the westsouthwest near 8 mph (13 km/h) and this motion is expected to continue through Sunday. On the forecast track, the center of Hanna should continue to move farther inland over southern Texas tonight and move into northeastern Mexico on Sunday.

Maximum sustained winds are near 85 mph (140 km/h) with higher gusts. Rapid weakening is expected as Hanna moves farther inland.

Hurricaneforce winds extend outward up to 30 miles (45 km) from the center and tropicalstormforce winds extend outward up to 90 miles (150 km).

The estimated minimum central pressure based on surface observations is 975 mb (28.79 inches).

NOAA Doppler weather radar data from Brownsville and Corpus Christi, Texas, along with reconnaissance data from the Air Force Hurricane Hunters indicate that Hanna has continued to strengthen this afternoon. A 30-nmi-wide eye remains distinct in the radar data, and dropsonde and 700-mb flight-level-level height data from the aircraft indicate that the central pressure has decreased to 973 mb. The aircraft measured a peak 700-mb flight-level wind speed of 86 kt on its last outbound leg, which equates to about 77 kt at the surface. Coincident with the flight-level wind data were SFMR surface wind speeds of 80 kt. In addition, Doppler velocity values have been averaging close to 100 kt between 5000-6000 ft in the northern and northeastern eyewall, which converts to 80-kt surface wind speed estimates. Based on these data, the initial intensity has been increased to 80 kt. No further strengthening is anticipated before the center of Hanna's eye makes landfall along the south Texas coast in a few hours.

Doppler radar and aircraft reconnaissance fixes indicate that Hanna has finally made the much anticipated turn toward the west-southwest, now showing an initial motion of 255/07 kt. A west-southwestward motion is expected to continue for the next 48 hours, which will take Hanna well inland over south Texas, followed by eventual dissipation in about 48 h over over the mountains of northeastern Mexico. The new NHC track forecast remains unchanged from the previous advisory, and lies near the center of the tightly packed consensus models.

NOAA Doppler weather radar data from Brownsville and Corpus Christi, Texas, along with reconnaissance data from the Air Force Hurricane Hunters indicate that Hanna has continued to strengthen this afternoon. A 30-nmi-wide eye remains distinct in the radar data, and dropsonde and 700-mb flight-level-level height data from the aircraft indicate that the central pressure has decreased to 973 mb. The aircraft measured a peak 700-mb flight-level wind speed of 86 kt on its last outbound leg, which equates to about 77 kt at the surface. Coincident with the flight-level wind data were SFMR surface wind speeds of 80 kt. In addition, Doppler velocity values have been averaging close to 100 kt between 5000-6000 ft in the northern and northeastern eyewall, which converts to 80-kt surface wind speed estimates. Based on these data, the initial intensity has been increased to 80 kt. No further strengthening is anticipated before the center of Hanna's eye makes landfall along the south Texas coast in a few hours.

Doppler radar and aircraft reconnaissance fixes indicate that Hanna has finally made the much anticipated turn toward the west-southwest, now showing an initial motion of 255/07 kt. A west-southwestward motion is expected to continue for the next 48 hours, which will take Hanna well inland over south Texas, followed by eventual dissipation in about 48 h over over the mountains of northeastern Mexico. The new NHC track forecast remains unchanged from the previous advisory, and lies near the center of the tightly packed consensus models.

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