Figure 1
Location of the Wrocław-Strachowice, Jelenia Góra and Śnieżka meteorological stations. Source: own study.
Table 1
Stress category according to UTCI
| Stress category | UTCI [°C] |
|---|---|
| Extreme heat stress | above 46 |
| Very strong heat stress | 38 to 46 |
| Strong heat stress | 32 to 38 |
| Moderate heat stress | 26 to 32 |
| No thermal stress | 9 to 26 |
| Slight cold stress | 0 to 9 |
| Moderate cold stress | -13 to 0 |
| Strong cold stress | -27 to -13 |
| Very strong cold stress | -40 to -27 |
| Extreme cold stress | below -40 |
[i] Source: Błażejczyk et al. 2010
Figure 2
Differences in UTCI for 12.00 UTC between 2015, 2018 and the 1971–2018 period for June, July and August in Wrocław, Jelenia Góra and Śnieżka. Source: own study
Figure 3
Frequency of thermal stress in the summer season (June–August) for 12.00 UTC in 1971–2018, 2015 and 2018 in Wrocław, Jelenia Góra and on Śnieżka, according to UTCI categories: extreme cold stress (-5), very strong cold stress (-4), strong cold stress (-3), moderate cold stress (-2), slight cold stress (-1), no thermal stress (0), moderate heat stress (1), strong heat stress (2), very strong heat stress (3). Source: own study
Figure 4
Synoptic situation over Europe on 8 August 2015, including sea level pressure field (left) and isobaric surface of 500 hPa (right). Source: The Royal Netherlands Meteorological Institute ; www.wetter3.de (R. Behrendt, H. Mahlke) (according to the conditions given by the map’s authors)
Figure 5
Course of air temperature (left) and UTCI (right) on 8–10 August 2015 in Wrocław (WR), Jelenia Góra (JG) and on Śnieżka (SN); UTCI categories: moderate cold stress (-2), slight cold stress (-1), no thermal stress (0), moderate heat stress (1), strong heat stress (2), very strong heat stress (3). Source: own study
Figure 6
Synoptic situation over Europe on 1 August 2018, including sea level pressure field (left) and isobaric surface of 500 hPa (right). Source: The Royal Netherlands Meteorological Institute ; www.wetter3.de (R. Behrendt, H. Mahlke) (according to the conditions given by the map’s authors)
Figure 7
Course of air temperature (left) and UTCI (right) on 31 July – 3 August 2018 in Wrocław (WR), Jelenia Góra (JG) and on Śnieżka (SN); UTCI categories: moderate cold stress (-2), slight cold stress (-1), no thermal stress (0), moderate heat stress (1), strong heat stress (2), very strong heat stress (3). Source: own study