Every heat event the pipeline tracked between 2007-05-01 and 2007-09-30, with how each one grew, peaked and moved. Anomalies are against the 1991–2020 baseline.
Season at a glance
Events tracked
22
Total heat burden
95.55 Mkm²·days
Longest
22days (#18)
Hottest
+15.2°C (#18)
With a heat dome
9of 22 events
A heat dome is the stricter object: a tracked heat event with a closed 500 hPa anticyclone whose influence cap overlies it, after Loikith et al. (2026). Most heatwaves are not domes, so the label is a finding and not a synonym.
ERA5 daily maximum 2 m temperature over land, against the 1991–2020 climatology (p90 in a centred 15-day window). A heatwave cell is Tx above p90 on at least 3 consecutive days.
When the events ran
Overlapping bars are concurrent events in different places, not one event counted twice: each is a separately labelled cluster of contiguous heatwave cells.
How each event evolved
Event #4 — 2007-05-15 → 2007-06-03 20 daysheat dome · 12/20 d · Z500 +223 m
peak 2.89 M km² on 2007-05-26 · max +14.9 °C · mean +9.3 °C · burden 29.57 M km²·d · drift 629 km (49.1 N 32.0 E → 45.9 N 38.9 E)
Event #18 — 2007-08-07 → 2007-08-28 22 daysheat dome · 15/22 d · Z500 +257 m
peak 2.33 M km² on 2007-08-24 · max +15.2 °C · mean +8.8 °C · burden 20.11 M km²·d · drift 1664 km (59.4 N 26.6 E → 47.9 N 42.9 E)
Event #14 — 2007-07-14 → 2007-08-01 19 daysheat dome · 11/19 d · Z500 +161 m
peak 1.69 M km² on 2007-07-17 · max +14.1 °C · mean +7.4 °C · burden 18.69 M km²·d · drift 2055 km (49.8 N 11.8 E → 39.1 N 33.0 E)
Event #11 — 2007-06-19 → 2007-06-29 11 dayshigh on 4/11 d only
peak 658k km² on 2007-06-26 · max +13.9 °C · mean +6.9 °C · burden 4.06 M km²·d · drift 1176 km (40.6 N 20.6 E → 37.2 N 33.5 E)
Event #5 — 2007-05-30 → 2007-06-13 15 daysheat dome · 10/15 d · Z500 +337 m
peak 520k km² on 2007-06-08 · max +13.0 °C · mean +9.1 °C · burden 4.02 M km²·d · drift 1008 km (65.4 N 12.4 E → 56.5 N 16.3 E)
Event #21 — 2007-08-30 → 2007-09-10 12 dayshigh on 5/12 d only
peak 509k km² on 2007-09-04 · max +10.9 °C · mean +6.0 °C · burden 3.43 M km²·d · drift 1463 km (39.7 N 27.6 E → 40.2 N 44.8 E)
Event #22 — 2007-09-25 → 2007-09-30 6 daysheat dome · 4/6 d · Z500 +318 m
peak 635k km² on 2007-09-28 · max +11.8 °C · mean +7.8 °C · burden 2.56 M km²·d · drift 923 km (62.8 N 37.2 E → 54.6 N 35.6 E)
Event #3 — 2007-05-09 → 2007-05-17 9 dayshigh on 4/9 d only
peak 525k km² on 2007-05-14 · max +10.7 °C · mean +6.9 °C · burden 2.31 M km²·d · drift 275 km (41.1 N 23.5 E → 43.0 N 25.6 E)
Event #1 — 2007-05-03 → 2007-05-09 7 daysheat dome · 5/7 d · Z500 +142 m
peak 653k km² on 2007-05-07 · max +13.0 °C · mean +7.4 °C · burden 2.21 M km²·d · drift 618 km (36.1 N 36.6 E → 36.1 N 43.4 E)
Event #16 — 2007-08-06 → 2007-08-11 6 daysheat dome · 6/6 d · Z500 +257 m
peak 427k km² on 2007-08-09 · max +12.2 °C · mean +7.6 °C · burden 1.38 M km²·d · drift 235 km (62.9 N 24.5 E → 60.9 N 23.4 E)
Event #2 — 2007-05-07 → 2007-05-15 9 daysheat dome · 6/9 d · Z500 +175 m
peak 237k km² on 2007-05-10 · max +10.1 °C · mean +6.0 °C · burden 1.11 M km²·d · drift 830 km (44.4 N 7.6 E → 40.8 N 16.5 E)
Event #6 — 2007-06-06 → 2007-06-12 7 dayshigh on 1/7 d only
peak 202k km² on 2007-06-08 · max +11.9 °C · mean +7.9 °C · burden 949k km²·d · drift 458 km (57.5 N 10.3 E → 53.6 N 12.4 E)
Event #10 — 2007-06-17 → 2007-06-26 10 dayshigh on 5/10 d only
peak 144k km² on 2007-06-24 · max +12.1 °C · mean +6.9 °C · burden 944k km²·d · drift 294 km (35.8 N 6.4 E → 35.7 N 9.7 E)
Event #8 — 2007-06-14 → 2007-06-17 4 dayshigh on 1/4 d only
peak 284k km² on 2007-06-15 · max +9.9 °C · mean +6.7 °C · burden 863k km²·d · drift 358 km (48.9 N 28.5 E → 50.7 N 32.7 E)
Event #9 — 2007-06-15 → 2007-06-18 4 dayshigh on 1/4 d only
peak 206k km² on 2007-06-16 · max +9.8 °C · mean +7.5 °C · burden 634k km²·d · drift 227 km (45.8 N 41.7 E → 47.7 N 42.7 E)
Event #12 — 2007-07-01 → 2007-07-09 9 dayshigh on 1/9 d only
peak 125k km² on 2007-07-05 · max +11.6 °C · mean +7.5 °C · burden 506k km²·d · drift 91 km (67.8 N 14.8 E → 68.6 N 15.1 E)
Event #19 — 2007-08-25 → 2007-08-30 6 daysno overlying high
peak 126k km² on 2007-08-28 · max +9.9 °C · mean +6.2 °C · burden 449k km²·d · drift 606 km (36.2 N 1.2 E → 36.2 N 8.0 E)
Event #15 — 2007-07-27 → 2007-08-01 6 dayshigh on 1/6 d only
peak 120k km² on 2007-07-28 · max +11.8 °C · mean +6.1 °C · burden 397k km²·d · drift 90 km (37.5 N -6.1 E → 37.2 N -5.2 E)
Event #20 — 2007-08-26 → 2007-08-29 4 daysno overlying high
peak 127k km² on 2007-08-27 · max +10.0 °C · mean +6.3 °C · burden 385k km²·d · drift 283 km (43.5 N 2.6 E → 41.3 N 0.8 E)
Event #17 — 2007-08-06 → 2007-08-08 3 daysheat dome · 3/3 d · Z500 +257 m
peak 119k km² on 2007-08-06 · max +9.6 °C · mean +7.2 °C · burden 354k km²·d · drift 5 km (63.8 N 15.2 E → 63.9 N 15.3 E)
Event #13 — 2007-07-09 → 2007-07-12 4 daysno overlying high
peak 102k km² on 2007-07-10 · max +10.0 °C · mean +5.4 °C · burden 323k km²·d · drift 167 km (39.3 N 28.8 E → 39.7 N 30.6 E)
Event #7 — 2007-06-14 → 2007-06-18 5 daysno overlying high
peak 110k km² on 2007-06-16 · max +5.7 °C · mean +4.2 °C · burden 313k km²·d · drift 426 km (38.0 N 43.6 E → 36.7 N 39.0 E)
Filled area is the event footprint in km² (left axis); the solid line is the peak anomaly inside it and the dashed line the mean (right axis). The small panel is the centroid path, circles sized by area and the ring marking day one. Drift is the straight-line start-to-end distance, so a dome that wandered and returned reports a small number.