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6 S. J. Harrison August Generally warm, but cool at wet at times The first two days were warm and dry but rain moved in from the west late on the 2nd. The weather remained dull and very unsettled up to the 7th which was dull and very wet (20.9 mm). After the 8th, the weather became warm and very humid, and the 10th was a particularly sticky day, reaching 24.1°C between short showers. After a foggy start to the 11th, unsettled, wet and windy weather persisted until the 16th. After a brief interlude of cool clear weather on the 17th and 18th, unsettled weather took over again on the 19th, and the 23rd provided yet another dull and wet Sunday, the temperature reaching only 13.5°C. The 24th saw a return to more settled weather and the days up to the 30th were sunny and, at times, quite warm. Under clear skies the overnight minimum on the 26th/27th fell to 3.5°C and the grass minimum reached 0.9°C in a first foretaste of autumn. September Warm but a little unsettled The month started dull and very wet, the 48 h rainfall total over the 1st and 2nd being 27.8 mm. The weather remained dull until the 6th, by which time former hurricane Danielle lay off the west coast of Scotland, where it lingered for the following three days. Heavy rain began falling late on the 7th and by the morning of the 10th another 19.7 mm had fallen. In the wake of the rain, the wind veered to a cool north-westerly and the days up to the 16th were dry and bright with excellent visibility. The wind became very strong for a while late on the 16th. The weather then became settled until the 23rd. There were warm sunny days, often after early morning mist or fog, and the temperature topped 20.0°C between the 18th and 21st. Dense fog refused to clear away on the 22nd, which was, in sharp contrast, dull and cold. The remaining days were cloudy and dull. October Cool and exceptionally wet There was a spell of dry but very dull weather over the first three days before the wind freshened easterly until the 6th. In the calm settled weather which followed, night temperatures fell, resulting in the first autumnal air frost by the 8th (–0.2°C). The settled spell was, however, short-lived as unsettled conditions moved in from the west at the start of what was to be a protracted wet spell, which lasted until the 27th. Winds were frequently strong, and rainfall was registered on all but one day. The 16th was an exceptionally wet day (21.9 mm; 29.3 mm Bridge of Allan) at the end of which the Allan was in flood. Hail showers fell on the 18th. Particularly stormy conditions reached the Stirling area during the afternoon of the 20th and by the morning of the 21st 46.3 mm of rain had fallen in Bridge of Allan in less than 15 hours, and the Allan was in flood again. The heavy rain returned on the 22nd (23.2 mm) and 24th (27.1 mm) and the Allan was in flood on both days. The unsettled wet weather seemed determined to continue, and the 26th and 27th were also wet and windy. Over the 12 days between the 16th and 27th a remarkable 130.9 mm of rainfall was registered at Parkhead (156.4 mm Bridge of Allan; 161.5 mm Flanders Moss) and it was no surprise that there was widespread flooding,
especially over the Carse. Although the wind remained fresh to strong from the south-west between the 28th and 30th, the rain became showery, much of which was squally and very heavy. November Variable but generally rather wet The weather on the 1st remained clear and bright with a sharp frost (–5.1°C) but rain fell on the 2nd and 3rd. The remnants of hurricane Mitch moved to the north of Scotland between the 8th and 9th bringing severe gales. There was some respite from the wind on the 10th and 11th before unsettled weather returned late on the 11th. Brighter weather returned on the 15th but night frosts returned, the minimum air temperature falling to –5.2°C by the morning of the 17th. The weather became wet and windy again on the 20th, but the daytime temperature reached 12.5°C on the 21st. Unsettled weather continued until the 28th when the Allan was again in flood. December Very changeable with some very mild spells The 1st and 2nd were cloudy and dull, the cloud base descending to low levels by mid-day on the 1st. A northerly airstream then became established and the 4th and 6th were very cold. Snow fell late on the 4th and lay for the next two days. The air temperature in Bridge of Allan had reached only –0.9°C by 14.00 h on the 6th, after an early morning minimum of –7.7°C (–6.8°C Parkhead). Unsettled weather swept in from the Atlantic on the 7th, marking an abrupt end to the brief cold spell. By the 8th the daytime temperature had risen above 10.0°C in a mild south-westerly breeze. Rain was then a regular feature until the 17th. Air temperatures were unseasonally high, exceeding 14.0°C on both the 13th and 14th. The wind turned to a cold easterly direction on the 18th , and by the 19th cold Arctic air had spread southwards across Scotland. Although sunny, the 20th and 21st were very cold, with frost at night. After the 21st unsettled weather with occasional sleet and snow persisted for much of the rest of the month. Showers on Christmas Day were associated with hail and thunder. Conditions became very stormy late on Boxing Day and by midnight the wind was gusting to storm force. There was widespread damage throughout Scotland and the Allan was in flood again on the 27th. Gales revisited on the 29th as the temperature increased very quickly in a mild southerly breeze, which unfortunately set off avalanches in the Scottish Highlands. WEATHER NOTES Noteworthy Scottish weather events during 1998 Weather 1998 7 • Storms of January – gales and heavy rain affected most of the British Isles with winds gusting to more than 90 mph in exposed west coast locations. Tulloch Bridge (Lochaber) recorded 120 mm of rain over three days. By the morning of the 4th the wind had reached 115 mph at Mumbles Head near
Page 1 and 2: Volume 22 the Forth Naturalist and
Page 3 and 4: THE WEATHER OF 1998 S. J. Harrison
Page 5: Weather 1998 5 May Warm and mostly
Page 9 and 10: 1991 -0.98 Below average 1992 -1.04
Page 11 and 12: Weather 1998 11 Figure 1 Monthly ai
Page 13 and 14: Weather 1998 13 Figure 3 Profile of
Page 15 and 16: Forth Naturalist and Historian, vol
Page 17 and 18: efore, but we have produced for the
Page 19 and 20: Bird Report 1998 19 Month 1996/7 19
Page 21 and 22: Bird Report 1998 21 BLACK-THROATED
Page 23 and 24: Bird Report 1998 23 over Stirling a
Page 25 and 26: Bird Report 1998 25 C 2 Gartmorn 15
Page 27 and 28: Bird Report 1998 27 1 L.Dochart 29
Page 29 and 30: Bird Report 1998 29 Dunmore 18 Oct
Page 31 and 32: Bird Report 1998 31 REDSHANK Tringa
Page 33 and 34: Bird Report 1998 33 WOODPIGEON Colu
Page 35 and 36: Bird Report 1998 35 S 20 Killin 2 A
Page 37 and 38: Bird Report 1998 37 F 63 Falkirk 28
Page 39 and 40: Bird Report 1998 39 GREAT GREY SHRI
Page 41 and 42: Bird Report 1998 41 LINNET Cardueli
Page 47 and 48: Wallacebank Wood 47 Before work on
Page 49 and 50: Wallacebank Wood 49 Breeding birds
Page 51 and 52: Appendix SCOTTISH WILDLIFE TRUST FA
Page 53 and 54: Hedge Woundwort Stachys sylvatica L
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Dragonflies of the Forth Area 57 at
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Figure 1. Sympetrum striolatum (Com
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Forth Naturalist and Historian, vol
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Falkirk District Plants 63 Poa subc
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Falkirk District Plants 65 Petasite
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Brambles of the Trossachs and Stirl
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Series RADULAE R. radula Weihe: As
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Wallace Oak: Supplement 81 1771 The
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Wallace Oak: Supplement 83 the boxe
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Wallace Oak: Supplement 85 1814 At
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1866 “Captain Stobo MP is to send
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Wallace Oak: Supplement 89 of a ‘
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Appendix Wallace Oak: Supplement 91
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grass as the tenants preferred. The
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Sir George Harvey 99 It was through
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Sir George Harvey 101 Harvey and ot
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Sir George Harvey 103 Figure 5 Fami
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Figure 10 Boy Restraining Dog - Qua
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Sheriffmuir Atlantic Wall 109 lengt
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Sheriffmuir Atlantic Wall 111 assoc
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Sheriffmuir Atlantic Wall 113 Figur
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Sheriffmuir Atlantic Wall 115 Figur
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Stirling, 70 years ago 119 the pend
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Stirling, 70 years ago 121 quality
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Stirling, 70 years ago 123 restrict
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Stirling, 70 years ago 125 Riversid
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Stirling, 70 years ago 127 in my ea
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executed at the Old Bridge or the C
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Stirling, 70 years ago 131 high bus
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Bridges of the Forth 135 All of thi
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Bridges of the Forth 137 Elegant as
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Bridges of the Forth 139 passed by
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Bridges of the Forth 141 an ordinar
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Bridges of the Forth 143 been incor
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Bridges of the Forth 145 Editorial
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Braco: Ardoch Bridge Knaik NN 837 0
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Forth Figure 5 Alloa Rail - after
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Figure 13 Old Bridge, Callander. Te
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Figure 18 Bridge of Devon, Tullibod
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