Storm Byron has already dumped significant rainfall on Israel's coastal regions. Since Wednesday and continuing through Thursday morning, approximately 60-70 millimeters (2.4-2.8 inches) have fallen in Zichron Yaakov, Haifa, and the Carmel area. Zichron Yaakov currently tops the national precipitation table with 77 millimeters (3 inches), followed by Ein Carmel with 73 millimeters (2.9 inches) and Haifa with 60 millimeters (2.4 inches). Overnight, the rain system shifted south toward the center of the country, focusing its intensity on Gush Dan (greater Tel Aviv area).
The rains are expected to continue on Thursday. By the afternoon – and particularly tomorrow – precipitation will intensify significantly, bringing a high risk of flooding. Localized rainfall is possible in the southern Negev. There is a serious concern regarding flash floods in the streams of the Judean Desert, the Dead Sea, and the northern Arava. A severe flood warning is in effect for the coastal plain and the Shfela (lowlands). Winds will be brisk, and temperatures will dip below the seasonal average.
Video: Storm Byron in Israel / Credit: Omri Zinger, Moshe Ben Simchon
Minute by minute – all the updates
1:40 p.m. | A tree collapsed in the courtyard of an educational institution in Rishon LeZion. Magen David Adom teams provided medical treatment and evacuated two approximately 10-year-old girls in mild condition with head injuries to Shamir-Assaf Harofeh Hospital.
1:30 p.m. | Magen David Adom teams were dispatched in the last half hour to several locations in the Shfela (lowlands), where vehicles became trapped in floodwaters. Rescue units are currently assisting with extraction efforts and stand ready to provide medical treatment if required.
Video: Yavne floods on Dec. 11, 2025 / Credit: Usage under Article 27a of Israel's intellectual property law
1:22 p.m. | Floodwaters have inundated King George Street in Tel Aviv.
1:15 p.m. | Footage from the Gaza Strip shows the collapse of a four-story building in the al-Nasr neighborhood of western Gaza City.
12:20 p.m. | Intense rainfall has lashed the Shfela (lowlands) in recent hours, with flooding recorded in cities including Rehovot. Rishon LeZion recorded 40 millimeters (1.6 inches) of rain in just three hours. Heavy rains persist along the northern coast, raising concerns of flooding near Zichron Yaakov. These heavy rains will continue along the coastal plain – specifically the southern coast and the lowlands – before spreading inland. Flash floods are expected in the Dead Sea streams throughout the day.
Video: Gaza building collapses during Storm Byron / Dec. 11, 2025
11:50 a.m. | Heavy fog has been reported in Daliyat al-Karmel.
10:50 a.m. | Interim Summary – High daily rainfall totals were measured this morning, primarily in the Carmel and Carmel Coast regions. Because this area also received significant precipitation at the start of the current system, cumulative totals there are far higher than in the rest of the country.
In the Nahal Me'arot Nature Reserve, 205 millimeters (8 inches) have accumulated since Saturday, with 94 millimeters (3.7 inches) falling in the last 24 hours alone. Atlit recorded 193 millimeters (7.6 inches) over the past three days, including 93 millimeters (3.7 inches) in the last day. Storm-level totals of 130-150 millimeters (5.1-5.9 inches) were recorded in Haifa and the Carmel, while the coastal plain north of Haifa and the northern Sharon region saw 100-120 millimeters (3.9-4.7 inches).
Video: Tel Aviv flooding on King George Street / Credit: Adi Nirman
Additionally, highly developed cloud formations moved over the area in the last 24 hours, bringing reports of hail. Today, the weather map will finally balance out as northwesterly winds drive the main rain clouds toward the center and south of the country.
Rainfall in central and southern Israel is expected to intensify. Within less than 24 hours, accumulations of 50-100 millimeters (2-4 inches) – and locally even more – are possible in the central and southern coastal plain. Heavy rain is also forecast for the central mountains, with a high probability of flash floods in the Judean Desert and northern Negev.
10:15 a.m. | Flooding and rain from Storm Byron reported in Gaza – civilians were seen attempting to navigate flooded roads.
9:30 a.m. | A 53-year-old man was found lifeless in Netanya with signs of hypothermia following the cold weather.
8:30 a.m. | Rainfall records for the last 48 hours according to the Israel Meteorological Service: Ein Carmel 165 millimeters (6.5 inches), Haifa Technion 139.7 millimeters (5.5 inches), Zichron Ya'akov 112.6 millimeters (4.4 inches), Shavei Zion 104.8 millimeters (4.1 inches), Nahariya 99.9 millimeters (3.9 inches).
7:57 a.m. | The Haifa and Carmel areas are leading the accumulated precipitation amounts over the last two days with 160–170 millimeters (6.3–6.7 inches), and 70 millimeters (2.8 inches) in the last 12 hours.
From the afternoon hours, the rains will enter the central and southern coast with strong rainfall intensity and dozens of millimeters of accumulation. The heavy rains will continue until the evening hours at least.
5:45 a.m. | Starting this morning (Thursday), temperatures will drop below the seasonal average. Rain accompanied by thunderstorms will fall intermittently from northern Israel to the northern Negev, with light rain possible in the southern Negev. Furthermore, there is a risk of flash floods in the Judean Desert, Dead Sea, and northern Arava streams, and a severe risk of urban flooding along the Coastal Plain and in the Shfela (Lowlands). Strong wind gusts are likely.
11:08 p.m. | Municipalities across the country have raised their alert level to "full storm protocol" in anticipation of the weather system. Operational units specializing in drainage, infrastructure, enforcement, and security have been reinforced and placed on standby to handle flooding, road blockages, and debris removal. Pumping crews and heavy engineering equipment have been deployed, underground passage systems inspected, and municipal call centers are operating on an emergency footing. The public is urged to avoid crossing flooded roads on foot or by vehicle, to secure loose objects susceptible to strong winds, and to avoid entering basements or underground parking garages during flood events.
10:24 p.m. | Update from Netivei Israel (National Transport Infrastructure Company): Road 40 has been closed to traffic in both directions from Tzihor Junction to the entrance of Mitzpe Ramon due to flooding.
